探究橡皮泥的弹性形变实验

Exploring the elastic deformation of plasticene

教学过程中,通常用弹簧演示弹性形变和范性形变,用橡皮泥演示范性形变.而橡皮泥是否会有弹性形变过程,本文将利用激光器和平面镜等材料,采用放大法,对该问题进行了研究.结果发现在橡皮泥的弹性限度以内,也会发生弹性形变,超过它的弹性限度,它将发生范性形变.

Usually, spring was used to demonstrate elastic deformation and plastic deformation, while plasticene was only used to demonstrate plastic deformation. In order to explore whether plasticene possessed elastic deformation, an amplification method was adopted by using laser and mirror. The experiment results indicated that within the elastic limit, it really had elastic deformation process, but after the elastic limit was exceeded, the plastic deformation occurred.