在工程结构应力分析中,经常遇到由不同弹性模量部件组成的结构物或各部分弹性模量(以下简称弹模)不同的构筑物。众所周知,结构物各部件弹模的差异对结构物的应力状态有显著的影响,所以在这类问题的模型试验中,可变弹模的光弹材料研制具有实际意义。国内外很多人在这一方面作了大量工作。 In the stress analysis of engineering structures, structures with different elastic modulus components or structures with different elastic moduli (hereinafter referred to as elastic modes) are often encountered. It is well known that the difference in the elastic modulus of each component of the structure has a significant influence on the stress state of the structure. Therefore, in the model test of this type of problem, the development of a photoelastic material of a variable elastic mold has practical significance. Many people at home and abroad have done a lot of work in this area.