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
  • A
    True
  • B
    False
  • C
    True only for brittle materials
  • D
    False; 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

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