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用SHPB技术测定了20—60℃范围内,有机玻璃的应力-应变曲线。用标准线性固体粘弹模型讨论了有机玻璃log(t) 随时间近似线性衰减的特性,得到反映声抗偶合的参数κ与粘弹性常数b=Ε’/η’相一致的结论。由κ值对温度的依赖性讨论了有机玻璃声抗偶合的粘弹效应。
The SHPB technique was used to determine the stress-strain curve of plexiglass in the range of 20-60 ℃. The linear linear viscoelastic model is used to discuss the logarithm linear attenuation of p (t) with time, and the conclusion that the parameter κ is consistent with the viscoelastic constant b = Ε ’/ η’ is obtained. The viscoelasticity of plexiglass acoustic coupling is discussed by the dependence of κ on temperature.