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Strength of Materials

Thermal Stresses in Composite Bars

Two bars one ...

Question

Two bars one of material A and the other of material B of same length are tightly secured between two unyielding walls. Coefficient of thermal expansion of bar A is more than that of B. When temperature rises the stresses induced are

A

tension in both the materials

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B

tension in material A and compression in material B

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C

compression in material A and tension in material B

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D

compression in both the materials

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Solution

The correct option is D compression in both the materials
Since both the supports are fixed and both bars will try to expand, so rise in temperature will cause compressive stresses in the bars.

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