Distortion is caused by

Distortion is caused by

• A. Forces that compress the component along its length
• B. Forces that bend the component without twisting
• C. Forces which twist the component from its original shape
• D. Forces that heat the material

Answer: (C)

Distortion is about a change in shape caused by shear deformation. When a component is twisted, torque makes adjacent layers rotate relative to each other, creating shear stresses and altering the angles inside the material. This change in geometry is what we call distortion. In contrast, pure compression or tension changes the length of the part rather than its shape, bending creates curvature with opposing tension and compression but not the same shear-based shape change, and heating can cause dimensional changes but isn’t the mechanical distortion described here unless there’s uneven heating.

Distortion is about a change in shape caused by shear deformation. When a component is twisted, torque makes adjacent layers rotate relative to each other, creating shear stresses and altering the angles inside the material. This change in geometry is what we call distortion. In contrast, pure compression or tension changes the length of the part rather than its shape, bending creates curvature with opposing tension and compression but not the same shear-based shape change, and heating can cause dimensional changes but isn’t the mechanical distortion described here unless there’s uneven heating.