Failure theories: identify Guest’s (maximum shear stress) theory statement. Statement: Failure occurs when the maximum shear stress in a biaxial stress state reaches the shear stress at the elastic limit in a simple tension test. Choose the correct option (True/False).
Mechanical Engineering
Machine Design
Difficulty: Easy
Choose an option
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ATrue
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BFalse
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CTrue only for brittle materials
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DFalse; that is distortion energy theory
Answer
Correct Answer: True
Explanation
ConceptGuest's (Tresca) theory, also called the maximum shear stress theory, states that yielding begins when the maximum shear stress in a complex state equals that at yield in simple tension. The statement given is exactly this criterion.
ContrastDistortion energy (von Mises) is a different criterion based on second deviatoric invariant.
Final AnswerTrue