Which phenomenon involves temperature changes leading to stresses in bearings and joints?

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Multiple Choice

Which phenomenon involves temperature changes leading to stresses in bearings and joints?

Explanation:
Temperature changes cause materials to expand or contract. In a bridge, bearings and joints often restrain this movement. When it gets warmer, the member wants to lengthen; if the restraint prevents it, internal stresses develop. When it cools, contraction is restrained and opposite stresses occur. This is thermal stress. The other terms describe stresses from applied loads or general loading rather than temperature-induced restraint forces.

Temperature changes cause materials to expand or contract. In a bridge, bearings and joints often restrain this movement. When it gets warmer, the member wants to lengthen; if the restraint prevents it, internal stresses develop. When it cools, contraction is restrained and opposite stresses occur. This is thermal stress. The other terms describe stresses from applied loads or general loading rather than temperature-induced restraint forces.

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