应变
对于承受力作用的构件，指该构件的相对变形（例如长度变化量与原始长度之比，或由剪切变形引起的角度变化量）。
Strain
For a member on which a force acts, the relative deformation of the member (e.g., change in length divided by the original length or change in angle due to shear deformation).
对于承受力作用的构件，指该构件的相对变形（例如长度变化量与原始长度之比，或由剪切变形引起的角度变化量）。
For a member on which a force acts, the relative deformation of the member (e.g., change in length divided by the original length or change in angle due to shear deformation).