形变、畸变、应变和变形等词汇是连续介质力学中描述物体变形的、最基本的术语,它们包含着不同的概念,我国力学家们对这些力学中最基本的概念都有着明确的含义。物体在外力的作用下要发生两种运动,一种运动是物体在空间位置的变化,我们叫刚性运动,另一种运动是物体自身形状和大小的变化,称力变形。 The terms of deformation, distortion, strain and deformation are the most basic terms describing the deformation of objects in continuum mechanics. They contain different concepts. Chinese mechanics have definite meanings to the most basic concepts in these mechanics. Objects under the action of external forces to occur two kinds of sports, one kind of exercise is the change in the position of the object in space, we call the rigid movement, the other kind of movement is the object’s own shape and size changes, said the force deformation.