本文对工业和科研部门等领域常用的几种塑料进行了力学破坏行为的探讨.并通过试验说明了它们在机械性能上的差异及在工程中正确掌握塑料的机械性能,精确有效地设计塑料制品,具有重要意义。最后通过与传统的工程材料低碳钢进行了比较,讨论了该两种工程材料力学性质上的差异及实验方法上的不同。 In this paper, some kinds of commonly used plastics in the fields of industry and scientific research are discussed in terms of mechanical failure behavior, and their differences in mechanical properties and the correct understanding of the mechanical properties of plastics in engineering are experimentally demonstrated, and the plastic products are accurately and effectively designed , Of great significance. Finally, by comparing with the traditional engineering material low carbon steel, the differences of mechanical properties and experimental methods of the two engineering materials are discussed.