Compressive Stress description

Compressive Stress description

• A. It stretches the material
• B. Adjacent parts press against each other, shortening the specimen
• C. It causes layers to slide parallel
• D. It increases cross-sectional area

Answer: (B)

Compressive stress is the internal resistance that develops when external forces push toward each other along the length of a material, causing it to shorten in the loading direction. The idea of adjacent parts pressing against one another captures this inward squeezing and the resulting shortening of the specimen. This is different from stretching (tensile stress), which would lengthen the material, and from sliding of layers (shear stress), which involves parallel interlayer movement. Changes in cross-sectional area aren’t the defining aspect of compression, though materials can exhibit transverse expansion due to Poisson’s effect.

Compressive stress is the internal resistance that develops when external forces push toward each other along the length of a material, causing it to shorten in the loading direction. The idea of adjacent parts pressing against one another captures this inward squeezing and the resulting shortening of the specimen. This is different from stretching (tensile stress), which would lengthen the material, and from sliding of layers (shear stress), which involves parallel interlayer movement. Changes in cross-sectional area aren’t the defining aspect of compression, though materials can exhibit transverse expansion due to Poisson’s effect.