Question
A beam is undergoing pure bending as shown in the figure. The stress (𝜎)-strain (𝜀) curve for the material is also given. The yield stress of the material is 𝜎𝑌. Which of the option(s) given represent(s) the bending stress distribution at cross-section AA after plastic yielding?
Options :
Answer :
Solution :
If bending stress at every fibre is equal to yield strength of the material, then entire cross-section undergoes plastic bending. Then, option (c) is correct. If bending stress at inner fibres is less than yield strength and bending stress at extreme fibres is equal to yield strength, then, option (d) is correct.
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