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Instron
2505 Series Flexural and
Interlaminar Shear
Test Fixture
Reference Manual - Equipment
M26-14151-EN Revision A
www.instron.com
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Electromagnetic Compatibility
Where applicable, this equipment is designed to comply with International Electromagnetic Compati-
bility (EMC) standards.
To ensure reproduction of this EMC performance, connect this equipment to a low impedance ground
connection. Typical suitable connections are a ground spike or the steel frame of a building.
Proprietary Rights Notice
This document and the information that it contains are the property of Instron Corporation. Rights to
duplicate or otherwise copy this document and rights to disclose the document and the information that
it contains to others and the right to use the information contained therein may be acquired only by
written permission signed by a duly authorized officer of Instron Corporation.
Trademarks
Instron®, Instron Logo, Dynatup®, Shore®, Wilson®, Rockwell®, and Brale® are registered trademarks
of Instron Corporation. Satec™ and other names, logos, icons, and marks identifying Instron products
and services referenced herein are trademarks of Instron Corporation. These trademarks may not be
used without the prior written permission of Instron.
Other product and company names used herein are trademarks or trade names of their respective
companies.
© Copyright 2004 Instron Corporation
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iii
Preliminary Pages
General Safety Precautions
Materials testing systems are potentially hazardous.
Materials testing involves inherent hazards from high forces, rapid motions and
stored energy. You must be aware of all moving and operating components that
are potentially hazardous, particularly the actuator in a servohydraulic testing
system or the moving crosshead in an electromechanical testing system.
Whenever you consider that safety is compromised, press the Emergency Stop
button to stop the test and isolate the testing system from hydraulic or electrical
power.
Carefully read all relevant manuals and observe all Warnings and Cautions. The
term Warning is used where a hazard may lead to injury or death. The termCaution is used where a hazard may lead to damage to equipment or to loss of
data.
Ensure that the test set-up and the actual test you will be using on materials,
assemblies or structures constitutes no hazard to yourself or others. Make full
use of all mechanical and electronic limits features. These are supplied to enable
you to prevent movement of the actuator piston or the moving crosshead beyond
desired regions of operation. Limits provide protection for your specimen and
machine and reduce potential hazard.
The following pages detail various general warnings that you must heed at all
times while using materials testing equipment. You will find more specificWarnings and Cautions in the text whenever a potential hazard exists.
Your best safety precautions are to obtain training in the testing equipment that
you are using and to read your Operating Instructions and Reference Manual(s)
to gain a thorough understanding of that equipment.
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Preliminary Pages M26-14151-EN
iv
Warnings
High/Low Temperature Hazard - Wear protective clothing when handlingequipment at extremes of temperature.
Materials testing is often carried out at non-ambient temperatures using ovens,
furnaces or cryogenic chambers. Extreme temperature means an operating
temperature exceeding 60 °C (140 °F) or below 0 °C (32 °F). You must use
protective clothing, such as gloves, when handling equipment at these
temperatures. Display a warning notice concerning low or high temperature
operation whenever temperature control equipment is in use. You should note
that the hazard from extreme temperature can extend beyond the immediate area
of the test.
Crush Hazard - Take care when installing or removing a specimen,assembly or structure.
Installation or removal of a specimen, assembly or structure involves working
inside the hazard area between the grips or fixtures. Keep clear of the jaws of a
grip or fixture at all times. Keep clear of the hazard area between the grips or
fixtures during actuator or crosshead movement. Ensure that all actuator or
crosshead movements necessary for installation or removal are slow and, where
possible, at a low force setting.
Explosion Hazard - Wear eye protection and use protective shields or
screens whenever any possibility exists of a hazard from the failure of a
specimen, assembly or structure under test.
Wear eye protection and use protective shields or screens whenever a risk of
injury to operators and observers exists from the failure of a test specimen,
assembly or structure, particularly where explosive disintegration may occur.
Due to the wide range of specimen materials, assemblies or structures that may
be tested, any hazard resulting from the failure of a test specimen, assembly or
structure is entirely the responsibility of the owner and the user of the
equipment.
Hazard - Ensure components of the load string are correctly pre-loaded to
minimize the risk of fatigue failure.
Dynamic systems, especially where load reversals through zero are occurring,are at risk of fatigue cracks developing if components of the load string are not
correctly pre-loaded to one another. Apply the specified torque to all load string
fasteners and the correct setting to wedge washers or spiral washers. Visually
inspect highly stressed components such as grips and threaded adapters prior to
every fatigue test for signs of wear or fatigue damage.
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v
Preliminary Pages
Table of Contents
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Upper Roller Assembly for the Three-Point Bend Application. . . . . . . . . . . . . 1-5
Upper Roller Assembly for the Four-Point Bend Application. . . . . . . . . . . . . . 1-6
Chapter 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Flexure Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Interlaminar Shear Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Fixture Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2505-249 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Forming Rollers 2506-491. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Forming Rollers 2506-492. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Forming Rollers 2506-493. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
3 to 4-Point Conversion Kit 2506-494 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Chapter 3 Installation and Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Installing the Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Installing the Upper Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Setting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Selecting the Correct Rollers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Fitting the Lower Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Setting the Lower Rollers Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Fitting the Upper Roller (3-Point Bend Only). . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Fitting the Upper Rollers (4-Point Bend Only). . . . . . . . . . . . . . . . . . . . . . . . . 3-7
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Preliminary Pages M26-14151-EN
vi
Setting the Upper Rollers Span (4-Point Bend Only) . . . . . . . . . . . . . . . . . . . 3-7
Chapter 4 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Positioning a Test Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Running a Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Before Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Changing your Test Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
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vii
Preliminary Pages
List of Illustrations
Figure 1-1. Fixture Set Up for ASTM Flexure Test with 150 mm Specimen . . . . . . . . . . . 1-3
Figure 1-2. Lower Roller Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure 1-3. Upper Roller Assembly for the Three-Point Bend Application . . . . . . . . . . . . 1-5
Figure 1-4. Optional Four-Point Bend Conversion Upper Anvil Assembly . . . . . . . . . . . . 1-6
Figure 2-1. Forming Rollers 2506-491 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figure 2-2. Forming Rollers 2506-492 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Figure 2-3. Forming Rollers 2506-493 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Figure 2-4. Forming Rollers 2506-494 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Figure 3-1. Installing the Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Figure 3-2. Installing the Upper Anvil Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Figure 4-1. Positioning a Test Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
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Preliminary Pages M26-14151-EN
viii
Three-Point Bend Fixture
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1-1
I
ntroductionChapter 1
Introduction
Outline
This chapter introduces the Instron 2505 Series Flexural and Interlaminar Shear
Test Fixture. It describes the purpose of the fixture, the difference between the
three and four-point upper roller assemblies, and describes each fixture
component and its relationship with other components. It includes the following
sections:
• About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
• Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
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About This Manual M26-14151-EN
1-2
About This Manual
This manual provides you with descriptions, specifications, and installation
procedures for the following Instron catalog numbers:
Note: Illustrations in this manual are generic unless labelled otherwise and
therefore do not necessarily show the exact roller size for your application.
Catalog Number Description
2505-429 10kN Flexural and Interlaminar Shear Test Fixture
2506-491
Forming rollers to:
ASTM D790
and
D2344
Lower Radius
3.2mm (0.125 in)
and
1.6mm (0.063 in)
Upper Radius
3.2mm (0.125 in)
2506-494
Optional Four-Point
Bend Conversion Kit
for ASTM D790
Span adjustable 60 mm (2.36 in) max
2506-492Forming rollers to:
BS2782
Lower Radius
2mm
and
3mm
Upper Radius
5 mm
and
3 mm
2506-493
Forming rollers to
DIN29971
CRAG2.1, 2.2
Lower Radius
5 mm
and
3mm
Upper Radius
12.5 mm,
5 mm and
3 mm
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1-3
Purpose
I
ntroductionPurpose
The flexural and interlaminar shear test fixture is designed primarily to perform
tests to measure the modulus, flexural strength and interlaminar shear strength of
unidirectional and crossply fibre composites. The fixture is easy to install and set
up. An optional kit facilitates easy conversion from 3-point to 4-point loading.
The specimen is supported on two lower rollers while a single upper roller applies
the load for a three-point bend test. For a four-point bend test, an upper roller
assembly comprising twin upper rollers to apply the load. Figure 1-1 illustrates
the Three-Point Bend Fixture.
Figure 1-1. Fixture Set Up for ASTM Flexure Test with 150 mm Specimen
55 1515 2525 3535 4545 5555 6565 7575
Upper Roller Assembly
Lower Roller Assembly
Specimen
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Description M26-14151-EN
1-4
Description
The fixture comprises two major components:
• The Lower Roller Assembly
• The Upper Roller Assembly. This assembly has two variants:
• 3-point bend
• 4-point bend
Lower Roller Assembly
Referring to Figure 1-2, the Lower Roller Assembly supports the specimen on
two hardened stainless steel Lower Forming Rollers. Each roller has two sizes of
Figure 1-2. Lower Roller Assembly
55 1515 2525 3535 4545 5555 6565 7575
Lower Forming RollersThumb Screw
Specimen Stop
Anvil Mounting
Lower Adaptor
M48 x 2 RH Lock Nut
Knurled Hand Wheel
Lead Screw
(Left Hand Thread)
Lead Screw
Right Hand Thread)
End Plate
Slide Plate
Locking Slide
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1-5
Description
I
ntroduction
roller and is reversible to allow you to conduct both flexure and interlaminar shear
tests according to the standards. Each roller is held in an Anvil Mounting which
rests on the Slide Plate. A Knurled Hand Wheel is fixed to a Lead Screw which is
supported by End Plates that are attached to the Slide Plate.
The Lead Screw has a left hand thread one end and a right hand thread the other
that engage the left hand and right hand Anvil Mountings respectively. Rotating
the Lead Screw drives the Anvil Mountings in opposite directions. An engraved
scale on the Slide Plate on the Anvil Mountings indicate the distance in
millimeters between the centre of each of the inner lower rollers and the centre of
the Slide Plate, i.e. When the scale reads 30mm the rollers are 60mm apart.
The lower anvils also feature Specimen Stops that can be fitted to either end of
each roller. The stops facilitate repeatable specimen alignment with respect to the
rollers.
The Lower Roller Assembly terminates in a standard Instron clevis connector. See“Installing the Lower Roller Assembly” on page 3-4. The lock nut gives
rigidity to the load string when tightened as instructed.
Upper Roller Assembly for the Three-Point Bend Application
When attached to the load cell of the load frame, the Upper Roller Assembly for a
three-point bend application applies the load on the specimen via a single
hardened stainless steel roller.
Figure 1-3. Upper Roller Assembly for the Three-Point Bend Application
Upper Roller Housing
Lock Nut
Upper Roller
Male Clevis
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Description M26-14151-EN
1-6
Referring to Figure 1-3, The Roller is a push fit in the Roller Housing. The Male
Clevis has groove at the bottom to accept a grub screw located in the Roller
housing.
The Upper Roller Assembly terminates in a standard Instron clevis connector. The
Upper Roller is aligned with the lower rollers during set up and then locked in
place. See “Installing the Upper Roller Assembly” on page 3-5. The lock nut
gives rigidity to the load string when tightened as instructed.
Upper Roller Assembly for the Four-Point Bend Application
The Upper Roller Assembly for the Four-Point Bend Application is shown in
Figure 1-4. When attached to the load cell, it applies the load on the specimen
via two hardened stainless steel rollers.
The Upper Rollers rest against the Roller Supports and are held in place by the
Upper Springs. The supports can slide laterally in the Upper Body to allow
adjustment of the span. Each support is secured in position by two socket head cap
screws.
Figure 1-4. Optional Four-Point Bend Conversion Upper Anvil Assembly
110 11090 9070 7050 5030 30
Roller Support
Upper Roller
Upper Spring
Lock Nut
Upper Body
Adaptor Nut
Adaptor
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1-7
Description
I
ntroduction
The scale on the Upper Body indicates the span between the two Upper Rollers in
millimeters. The scale is read against the inside edge of the supports and is
graduated such that when each support position is the same on the scale, the roller
centres are that distance apart, e.g. 30 mm as illustrated.
The Adaptor Nut is attached to the Upper body and the Adaptor Screws into the
Adaptor Nut.
The Upper Roller Assembly terminates in a standard Instron clevis connector. The
Upper Rollers are aligned with the lower rollers during set up and then locked in
place. See “Installing the Upper Roller Assembly” on page 3-5. The lock nut
gives rigidity to the load string when tightened as instructed.
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Description M26-14151-EN
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2-1
Specifications
Chapter 2
Specifications
Outline
This chapter contains data for the 2505 series Flexural and Interlaminar Shear Test
Fixture and accessories. It includes the following sections:
• Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
•Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
• Fixture Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
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Catalog Numbers M26-14151-EN
2-2
Catalog Numbers
Applicable Standards
Caution
Always refer to the published standards
The data in this section is given in good faith as a quick reference. Instron does
not accept liability for faulty test results caused by using the data. Always check
with the officially published standards.
Catalog Number Description
2505-429 10kN Flexural and Interlaminar Shear Test Fixture
2506-491
Forming rollers to:
ASTM D790
and
D2344
Lower Radius
3.2mm (0.125 in)
and
1.6mm (0.063 in)
Upper Radius
3.2mm (0.125 in)
2506-494
Optional Four-Point
Bend Conversion Kit
for ASTM D790
Span adjustable 60 mm (2.36 in) max
2506-492Forming rollers to:
BS2782
Lower Radius
2mm
and
3mm
Upper Radius
5 mm
and
3 mm
2506-493
Forming rollers to
DIN29971
CRAG2.1, 2.2
Lower Radius
5 mm
and
3mm
Upper Radius
12.5 mm,
5 mm and
3 mm
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2-3
Applicable Standards
Specifications
Flexure Tests
Interlaminar Shear Tests
Method
SpecimenSpan Ratio
(Span:Height)
Lower
Roller
Diameter
(mm)
Upper
Roller
Diameter
(mm)r
Speed
(mm/min)
Width
(mm)
Height
(mm)
Length
(mm)
ASTM 3pt
25 2 50 16:1 6.4 6.4 0.9
25 2 80 32:1 6.4 6.4 3.4
25 2 100 40:1 6.4 6.4 5.3
25 2 150 60:1 6.4 6.4 12.0
ASTM 4pt
(1/3, 1/3, 1/3)
25 2 150 Upper 20:1 6.4 6.4 13.3
25 2 150 Lower 60:1 6.4 6.4 13.3
ASTM 4pt
(1/4, 1/2.,1/4)
25 2 150 Upper 30:1 6.4 6.4 12.0
25 2 150 Lower 60:1 6.4 6.4 12.0
BSI 3pt 15 2 50 16:1 4 10 1.0
DIN 3pt 10 2 100 40:1 10 25 6.0
AFNOR 3pt 10 2 100 40:1 10 25 5.0
CRAG 3pt 10 2 100 40:1 10 25 5.0
Method
SpecimenSpan Ratio
(Span:Height)
Lower
Roller
Diameter
(mm)
Upper
Roller
Diameter
(mm)
Speed
(mm/min)Width
(mm)
Height
(mm)
Length
(mm)
ASTM 10 2 14 5:1 3.2 6.4 1.3
BSI 10 2 12 5:1 6 6 1.0
DIN 10 2 20 5:1 6 6 1.0
AFNOR 10 2 20 5:1 6 6 1.0
CRAG 10 2 210 5:1 6 6 1.0
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Fixture Components M26-14151-EN
2-4
Fixture Components
2505-249
Note: Fixture needs at least one set of forming rollers
Forming Rollers 2506-491
Table 2-1. General Specifications
Parameter Specification
Capacity 10 kN (2250 lb)
Span Distance (Adjustable) 10 mm to 150 mm (0.4 in to 5.9 in)
Upper Roller Assembly Load Frame Fitting 6 mm (0.24 in) Clevis Pin (Type 0m)
Lower Roller Assembly Load Frame Fitting 16 mm (0.63 in) Clevis Pin (Type 1m)
Temperature Range -70° to 350° C (-94° to 662° F)
Width 225 mm (8.86 in)
Weight 8 kg (19 lb)
Figure 2-1. Forming Rollers 2506-491
Item T8593R-1003
6.4 mm
DiameterItem T8593R-1002
Item T8593R-1001
3.2 mm
Diameter
6.4 mm
Diameter
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2-5
Fixture Components
Specifications
Forming Rollers 2506-492
Forming Rollers 2506-493
Figure 2-2. Forming Rollers 2506-492
Item T8594R-1003
6.0 mm
DiameterItem T8594R-1002
Item T8594R-1001
4.0 mm
Diameter
6.0 mm
Diameter
Figure 2-3. Forming Rollers 2506-493
Item T8595R-1003
6.0 mm
DiameterItem T8594R-1002
Item T8594R-1001
10.0 mm
Diameter
Item T8595R-1002
Item T8595R-1001
10.0 mm
Diameter
25.0 mm
Diameter
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Fixture Components M26-14151-EN
2-6
3 to 4-Point Conversion Kit 2506-494
Figure 2-4. Forming Rollers 2506-494
6 mm Diameter Roller
Item T10 mm Diameter Roller
Item T1122-2043
25 mm Diameter Roller
Item T1122-1041
Upper Spring
25 mm Diameter RollerItem T1122-1047
Upper Spring
10 mm Diameter Roller
Item T1122-1049
Upper Spring
6 mm Diameter RollerItem T8600-10001
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3-1
Installation and
Set Up
Chapter 3
Installation and Set Up
Outline
This chapter contains instructions for installing and setting up the fixture on a load
frame. It includes the following sections:
• General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
•Installing the Lower Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
• Installing the Upper Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
• Setting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
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General M26-14151-EN
3-2
General
Warning
The installation of the fixture on a load frame comprises:
• Installing the Lower Roller Assembly
• Installing the Upper Roller Assembly for 3-point bend or 4-point bend.
Setting up the fixture for testing comprises:
• Selecting and fitting the correct upper and lower rollers for your test.
• Setting the lower roller span
• 4-point bend only - Setting the upper roller span
Refer to the following sections for detailed information on the above procedures.
Equipment
You need the following items:
A soft cloth
A metric hex key wrench set
4-point bend only - A flat bladed screwdriver
Before You Begin
Check for the following conditions:
There is enough room between the load cell and the load frame base to install
the fixture.
Crush Hazard - Take care when installing or removing a fixture or its
components.
Installation or removal of a fixture or its components involves working insidethe hazard area between the fixture rollers. Keep clear of the fixture rollers at alltimes. Keep clear of the hazard area between the fixture rollers during actuatoror crosshead movement. Ensure that all actuator or crosshead movementsnecessary for installation or removal are slow and, where possible, at a lowforce setting.
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3-3
General
Installation and
Set Up
The testing system is in standby mode.
The testing system extension limits are set to prevent the upper and lower
anvil assemblies from colliding.
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Installing the Lower Roller Assembly M26-14151-EN
3-4
Installing the Lower Roller Assembly
1. Use the soft cloth to wipe any dirt or debris from mating surfaces of the anvil
assemblies, load cell and load frame base.
2. Referring to Figure 3-1, carefully place the Lower Roller Assembly into the
Base Adaptor located on the base of the load frame .
3. Rotate the assembly so that the scale faces the front of the load frame and the
clevis holes are aligned.
4. Insert the Clevis Pin through the holes and secure in position with the ClevisPin Clip.
5. Tighten the Lock Nut against the Base Adaptor.
Note: Before you can begin testing, you must select and fit the correct rollers.See “Setting Up” on page 3-6 .
Figure 3-1. Installing the Lower Roller Assembly
55 1515 2525 3535 4545 5555 6565 7575
Base Adaptor
Lower Roller AssemblyLock Nut
Clevis Pin
Load Frame Base
Clevis Pin Clip
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3-5
Installing the Upper Roller Assembly
Installation and
Set Up
Installing the Upper Roller Assembly
1. Referring to Figure 3-2, insert the Upper Roller Assembly (Three-Point or
Four-Point) into the Female Clevis on the load cell.
2. Rotate the Upper Roller Assembly until the Upper Roller(s) is parallel with
the Lower Rollers and the clevis holes are aligned. For the 4-Point assembly,
rotate the Upper Roller Assembly so that the scale faces the front of the
machine and the clevis holes are aligned.
3. Insert the 6 mm Clevis Pin through the holes and secure in position with the
Clevis Pin Clip.
4. Tighten the Lock Nut against the Female Clevis on load cell.
Note: Before you can begin testing, you must select and fit the correct rollers.See “Setting Up” on page 3-6 .
Figure 3-2. Installing the Upper Anvil Assembly
110 11090 9070 7050 5030 30
Lower
Roller
Assembly
Lock Nut
Female Clevis
Clevis Pin Clip
6 mm Clevis Pin
4-Point Bend
3-Point Bend
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Setting Up M26-14151-EN
3-6
Setting Up
Selecting the Correct Rollers
Consult your test standard for the required dimension of roller(s) for your test and
identify the item numbers that correspond to them by referring to the
“Specifications” chapter. The rollers have the item number or roller diameter
engraved upon them. Select the required items.
Fitting the Lower Rollers
1. Loosen and remove the cap head screw retaining the stop in each of the lower
rollers.
2. Loosen and remove the two cap head screws in each of the lower rollers.
3. Remove the existing rollers
4. Place the pair of new rollers in position. The rollers must be placed with the
size you require towards the centre of the fixture.
Note: Failiure to position the rollers correctly wil prevent you from setting the correct span.
5. Secure the rollers using the two cap head screws previously removed
6. Secure the stops to the rear of the inner rollers with the cap head screws
previously removed.
Setting the Lower Rollers Span
1. Loosen the Thumb Screws on each of the Anvil Mountings.
2. Rotate the Knurled Hand Wheel until the engraved marks on the Anvil
mountings match the desired span as shown on the scale.
3. Tighten the Thumb Screws on each of the Anvil Mountings.
Fitting the Upper Roller (3-Point Bend Only)
1. Loosen the set screw in the Roller housing until the housing is free of the
Male Clevis.
2. Position the new Roller Housing over the Male Clevis and tighten the set
screw enough to engage it in the groove of the Clevis.
3. Rotate the Housing until the Upper Roller is parallel to the Lower Rollers.
4. Tighten the set screw so that it grips the Clevis.
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3-7
Setting Up
Installation and
Set Up
5. Check the alignment of the Upper and Lower Rollers.
Fitting the Upper Rollers (4-Point Bend Only)
1. Pull the two Upper Rollers vertically downwards to free them from the UpperSprings.
2. Loosen and remove the four pan head screws that retain the Upper Springs.
3. Remove the pan head screws from the existing Springs and insert them in the
loop of the new Springs.
4. Insert the panhead screws into the Roller Supports. Do no tighten them
completely.
5. Clip the new Upper Rollers into the Upper Springs.
6. Tighten the pan head screws.
7. Check the alignment of the Upper and Lower Rollers.
Setting the Upper Rollers Span (4-Point Bend Only)
1. Support the Upper Body, loosen and remove the cap head screw holding the
Upper Body to the Adaptor Nut.
2. Remove the Upper Body and loosen the four caphead screws holding the
Roller Supports to the Upper Body.
3. Slide the Roller supports until the required span is achieved as indicated by
the inner edge of the Support against the scale.
4. Tighten the four cap head screws finger tight only. Check that the span iscorrect and the Upper Rollers are parrallel.
5. Fully tighten the four caphead screws.
6. Replace the Upper Body under the Adaptor Nut ,insert the retaining cap head
screw and tighten finger tight.
7. Rotate the Upper Body until the Upper Rollers are parallel with the Lower
Rollers.
8. Fully tighten the cap head screw.
9. Check the alignment of the Upper and Lower Rollers.
Note: For wider spans, it is possible to gain access to the Roller Support cap head screws without removing the the Upper Body from the Adaptor Nut.
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Setting Up M26-14151-EN
3-8
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4-1
Testing
Chapter 4
Testing
Outline
This chapter includes the following sections:
• Positioning a Test Specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
• Running a Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
• Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Warnings
Crush Hazard - Take care when installing or removing a specimen.
Installation or removal of a specimen involves working inside the hazard areabetween the fixture rollers. Keep clear of the fixture rollers at all times. Keepclear of the hazard area between the fixture rollers during actuator or crossheadmovement. Ensure that all actuator or crosshead movements necessary forinstallation or removal are slow and, where possible, at a low force setting.
Explosion Hazard - Wear eye protection and use protective shields or
screens whenever any possibility exists of a hazard from the failure of a
specimen, assembly or structure under test.
Wear eye protection and use protective shields or screens whenever a risk of
injury to operators and observers exists from the failure of a test specimen,
assembly or structure, particularly where explosive disintegration may occur.
Due to the wide range of specimen materials that may be tested, any hazard
resulting from the failure of a test specimen is entirely the responsibility of the
owner and the user of the equipment.
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Positioning a Test Specimen M26-14151-EN
4-2
Positioning a Test Specimen
Caution
Failure to place the specimen against the two stops will affect your test
data.
The specimen is cut so that the direction of the fibres is longitudinal. If specimens
are not aligned correctly in the fixture your test results will be incorrect.
Place the specimen on the Lower Rollers as shown in Figure 4-1. Ensure that the
specimen is placed directly against both Stops.
Note: Lateral positioning is not critical, but you should endeavour to keep your
specimen central.
When the specimen is properly positioned in the fixture, it is ready for testing.
Figure 4-1. Positioning a Test Specimen
Lower Roller
Specimen
Stop
M3 Cap Head Screw
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4-3
Running a Test
Testing
Running a Test
Caution
Set extension limits on the load frame before starting a test. Failure to set
limits may cause damage to test fixtures.
Refer to the reference material (manuals and online help) for your load frame and
software platform to properly set up the load frame and test procedure.
Note: When using Bluehill, Merlin or Series IX software, you will need to use the Flexure Test Template to set up a test method.
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Maintenance Procedures M26-14151-EN
4-4
Maintenance Procedures
A build-up of test debris on the fixture may create unnecessary wear on
components and specimens and may cause inaccurate test results. Keep the fixture
and the surrounding test area clean.
Before Testing
• Visually inspect the rollers for any signs of wear or cracks. Do not use the
fixture if cracks or any signs of deterioration appear. Contact your nearest
Instron Service representative regarding repair or replacement services.
• Wipe the rollers with a soft cloth to remove any testing debris.
• Check that all screws are snug and tighten as necessary.
Changing your Test Set Up
• Clean all components thoroughly when changing fixture components
• Check that the Lead Screw is operating smoothly and lubricate with light oil
as necessary.
• Store the upper and lower rollers in the case provided when not in use.
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