Question:

The failure theory which is the most conservative for ductile materials is

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For ductile materials, the maximum principal stress theory is the most conservative and commonly used for failure analysis.
Updated On: Sep 24, 2025
  • Maximum principal stress theory
  • Maximum shear stress theory
  • Maximum shear strain energy theory
  • Maximum principal strain theory
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Failure Theories.
The maximum principal stress theory is considered the most conservative failure theory for ductile materials. This theory assumes that failure occurs when the maximum principal stress reaches the material's ultimate tensile strength.
Step 2: Conclusion.
Thus, the most conservative failure theory for ductile materials is the maximum principal stress theory, making option (1) the correct answer.

Final Answer: \[ \boxed{1. \, \text{Maximum principal stress theory}} \]
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