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应力应变与温度响应规律是热辐射与应力应变之关系的基础,当前的研究初步揭示了热场对变形场的响应,显示岩石在常温条件下也有受热膨胀材料的特点,温度作为一种标量对变形有很灵敏的响应.然而并没有给出变形与温度响应之间的物理关系.本文根据热力学原理,弹性理论以及理想材料和岩石样本力学实验,对应力应变与温度响应之间的物理规律进行研究.结果表明,在介质弹性变形阶段,对于各向同性材料,应力应变与温度响应之间存在下列关系:1)温度响应与体应变变化成正比.静水压增加,体积变小,标本处于挤压状态,温度上升;静水压减小,体积增加,标本处于拉张状态,温度下降.2)纯剪变形不引起温度变化.样本的形状改变并不引起温度变化.另外,纯剪状态下,样本的局部存在相对拉张与挤压区,其温度会随着外载荷的变动出现一定变化,且相对拉张和挤压区的温度变化趋势刚好相反.
The stress-strain and temperature-response laws are the basis of the relationship between thermal radiation and stress-strain. The current research initially reveals the response of the thermal field to the deformation field. It shows that the rock is also characterized by thermal expansion at room temperature. Temperature as a scalar pair However, the physical relationship between deformation and temperature response is not given.Based on the thermodynamics theory, the elasticity theory and the mechanical experiments of ideal materials and rock samples, the physical laws between stress and strain and temperature response The results show that there exists the following relationship between the stress and strain and the temperature response for the isotropic material in the phase of elastic deformation: 1) The temperature response is proportional to the change of bulk strain, the hydrostatic pressure increases, the volume decreases, Squeeze state, the temperature rise; hydrostatic pressure decreases, the volume increases, the specimen is stretched, the temperature decreases .2) pure shear deformation does not cause temperature changes .Sample change does not cause temperature changes.In addition, the pure shear state , The local existence of the specimen relative to the tension and compression zone, the temperature will change with the external load changes, and relative tension and compression zone The trend of temperature changes just the opposite.