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光弹性单向应变计和双向应变计是根据光弹涂层的基本原理,用环氧树脂薄板制成的实测应力(应变)的工具。它具有轻便、成本低、粘贴方便等优点,较适用于矿井及地下坑道等条件下大量观测的需要。做环氧树脂薄板的材料比<重量比>为:6101~#环氧树脂 100顺丁烯二酸酐 30苯二甲酸二丁脂 5二甲基苯胺 0.3环氧树脂薄板的弹性模量E=4.16×10~4公斤/厘米~2,泊松比μ=0.37,材料条纹
Photoelastic one-way strain gages and two-way strain gages are based on the basic principle of photoelastic coating, and are made of epoxy resin sheets for measuring the stress (strain) of the tool. It has the advantages of light weight, low cost, convenient paste, etc. It is more suitable for large-scale observations under the conditions of mines and underground tunnels. The ratio of materials used to make epoxy resin sheets is <=weight ratio>: 6101~# epoxy resin 100 maleic anhydride 30 dibutyl phthalate 5 dimethylaniline 0.3 elastic modulus of epoxy resin sheet E=4.16 ×10~4 kg/cm~2, Poisson’s ratio μ=0.37, material streaks