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一、前言在光测弹性试验中,当模拟结构物各部位具有不同的弹性系数时,在荷载作用下对结构物应力的影响(如水工建筑物中坝体与基础、坝体內不同区域不同的混凝土标号,和不同材料构成的机械另件等。),就要求制造出具有各种不同弹性系数的光测弹性材料,粘合在一起进行试验。其理想条件如下: 1.能制得不同弹性系数的材料,使其比值为一常数,同时泊松比和原型相同,无光学力学蠕动,并且具有足够高的弹性系数,使得试验中不致产生较大的变形。
I. INTRODUCTION In the photoelastic test, when the simulated structure has different elastic coefficients in different parts, the influence of the stress on the structure under the load (such as the dam body in the hydraulic structure and the different areas in the dam body Concrete markings, mechanical parts made of different materials, etc.) require that photoelastic materials with various elastic coefficients be fabricated and bonded together for testing. The ideal conditions are as follows: 1. The material with different elastic coefficients can be made to have a constant ratio, while the Poisson’s ratio is the same as the prototype, no optical mechanics creep, and a sufficiently high elasticity coefficient, so that the test will not produce a comparison. Big deformation.