MECHANICAL AND PHOTOPLASTICITY RESEARCH OF POLYMETHYL METHACRYLATE

Mechanical and optical functions of polymethyl methacrylate are analyzed in this paper.The function data of polymethyl methacrylate at normal temperature and freezing temperature were got in the experiments.The viewpoints that the fringe at normal temperature was strain fringe and the fringe at freezing temperature was stress fringe are given out .Polymethyl methacrylate was used to stimulate squeezing.The results prove that polymethyl methacrylate is one of the hot plastic materials which has good optical properties to simulate the plastic processing technology.