निम्नलिखित में से कौन सी अधिकतम विकृति ऊर्जा सिद्धांत (maximum strain energy theory) की एक सीमा है?

In shaft design, maximum principal stress theory is reasonably applicable when the material is:

Which theory states that failure or yielding occurs at a specific location within a member when the maximum principal stress reaches the material's limiting strength as determined in a simple tension test?