fatigue analysis guide
TRANSCRIPT
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Quick Fatigue
Analysis Guide This guide is made for non-experienced FEA users. It provides basic knowledge needed to start your fatigue calculations quickly. Experienced FEA can also use this guide to get used to NFX workflow.
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TABLE OF CONTENTS:
What is Fatigue? 3
Fatigue Design Philosophy 4
Life Estimation Methods 5
Fatigue Loading 6
-N Curve 7
Stress Life approach 8
Strain Life approach 9
Strain Life Curve 10
Fatigue Workflow in midas NFX 11
Fatigue Module 12
Approach Selection, Stress Option 13
Fatigue Property, Mean Stress Correction 14
Load/Stress History 15
Fatigue Results 16
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Fatigue failure is defined as the tendency of a material to
fracture by means of progressive brittle cracking under
repeated alternating or cyclic stresses of an intensity
considerably below the normal strength.
Although the fracture is of a brittle type, it may take some
time to propagate, depending on both the intensity and
frequency of the stress cycles.
All structures and mechanical components that are cyclically
loaded can fail by fatigue.
Fundamental requirements during design and manufacturing
to avoid fatigue failure are different for each different case
and should be considered during the design phase.
What is Fatigue Failure?
Page 3
Examples of fatigue failure
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