Practical stress analysis part1

transcript

Nov 2016

Stress Analysis

Introduction/forces /supports

Adel_zekry@yahoo.com

Practical Stress analysis Part1

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Structures General

Stress Analysis

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Introduction

Stress Analysis

Aim :Road map to study and review practical stress analysisFurther study to by FEM and experiments

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Structures General

Stress Analysis

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Stress Analysis

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Stress Analysis

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Introduction

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Introduction

stress analysisIs an engineering discipline that uses many methods to determine the:

• strains is the measure of the deformation of the material of the structures subjected to forces.

• stress is a physical quantity that expresses the internal forces

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Stress analysis is a primary task for most engineering branches • civil• mechanical • aerospace engineers • …………………

stress analysis task are :

• design structures and mechanical assemblies ,…..• maintenance of such structures• investigate the causes of structural failures.

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Stress analysis calculation process of a structure may begin with the calculation of deflections or strains and end with calculation of the stresses.

stress analysis is often a tool rather than a goal in itselfthe ultimate goal being the design of structures and mechanical assemblies that can withstand a specified load, using the minimum amount of material or that satisfies some other optimality criterion.

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starting point for stress analysis are

•a geometrical description of the structure, •the properties of the materials used for its parts, •how the parts are joined,

and the maximum or typical forces that are expected to be applied to the structure( Load cases )

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The output data is typically a quantitative description of

strains and the deflections of the entire structure and each component of that structure. stresses how the applied forces spread throughout the structure, resulting in stresses,

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Note 1The analysis may consider forces that vary with time, such as engine vibrations or the load of moving vehicles. In that case, the stresses and deformations will also be functions of time and space.

Note 2Stress analysis may be performed through classical mathematical techniques, analytic mathematical modeling or computational simulation, experimental testing, or a combination of methods.

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Supports types

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Supports types

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FORCE SYSTEM

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Force system

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Stress Analysis

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Practical stress analysis part1

Design