Structural Design Code Verifier

Fatigue calculations

SDC Verifier

www.sdcverifier.com2

Other FEM programs with FEMAP inside in version 4.0

Embedded

Separate GUI

What is SDC Verifier?

3

The goal of SDC Verifier is checking structures according to standards and report generation.

Load combinations:

Standard like calculation structure

4

Individual Load = single load result

Load Set = combination of loads

Load Group = envelope of set of results

Load combinations:

Add/Edit Multiple

www.sdcverifier.com5

Import Load Sets or Load

Groups from MS Excel

Create/edit multiple Load

combinations at once.

Tools

www.sdcverifier.com6

Model recognition:

Panel Finder;

Beam Member Finder;

Joint check

Complicated Loads: Wind, Buoyancy and Tank Load;

Rule Based Selector.

Model recognition

www.sdcverifier.com7

Section and Panel finder

Frames

Decks

Longitudinals

Example Frame 36

Model recognition

8

Plate finder

Beam / Joint

finder

Weld finder

Coming in 4.0 Recognition:

Panel, Girder/stiffener and plate

www.sdcverifier.com9

What is SDC Verifier?

10

SDC Verifier calculation core

www.sdcverifier.com11

No black box but editable

Example report

www.sdcverifier.com12

What benefits for fatigue?

13

Fatigue Check example

(mean stress correction)

www.sdcverifier.com14

Classification

Rules based on standards:Load cycles

Fatigue: Multiple load cycles in load

groups

15

Delta stresses from:

- Load set with type of loading and # cycles

- Group of load sets with # cycles

Example load cycle groups

16

Make more load cycle groups

Fatigue Check example

(mean stress correction)

www.sdcverifier.com17

For single stresses

Combined

Maximum Fatigue Damage

Classification

Rules based on standards:Load cycles

18

Stress concentration at the weld

www.sdcverifier.com19

set FAT classes using Joints

Example beam model

Classifications

Fatigue damage

Weld recognition

Weld recognition

Сlassification: Weld Quality

23

24

Eurocode 3 /EN13001

Stress perpendicular to weld Stress parallel with weld

Fatigue resistance depends on

stress direction

25

K2 K1

K1 K0

W0

Steel GradePermissible stresses zulσD(-1) for k=-1 element group 5 St 52-

3

Notch group W0 W1 W2 K0 K1 K2 K3 K4

Stress

amplitude163.8 130.3 104.2 118.8 106.1 89.1 63.6 38.2

Weld classification

Example Detailed results

Weld locations

Calculated fatigue damage result

Reality check

Repair

Crack

Fatigue

www.sdcverifier.com29

The following methods are implemented:

Crane industry like standards (take into account average stress)

F.E.M. 1.001 (is referred to a lot from offshore code Loyds LAME for example)

DIN 15018

NEN 2018

JIS B 8821

CMAA

Civil engineering like code (only stress difference)

Eurocode 3

IIW

EN 13001

Conclusions SDC Verifier

www.sdcverifier.com31

Verification of structure according to standards

Model recognition facilitates the use of a standard FEM model

Translation of FEM results in (complicated) code checking results

Complete documentation of model and results

Regenerate complete calculation procedure after model changes

Focus on engineering let SDC Verifier do the bookkeeping

Use 45 days trial to check it yourself (download SDC Verifier on

www.sdcverifier.com and request trial at support@sdcverifier.com);