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Failure Criteria
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The purpose of failure criteria is to predict or estimate the failure/yield of machine parts and structural members.

A considerable number of theories have been proposed. However, only the most common and well-tested theories applicable to isotropic materials are discussed here. These theories, dependent on the nature of the material in question (i.e. brittle or ductile), are listed in the following table:

All four criteria are presented in terms of principal stresses. Therefore, all stresses should be transformed to the principal stresses before applying these failure criteria.

Introduction Ductile Materials Brittle Materials Failure Prevention

 

 

 

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