一、壳体中几种典型的热应力对于不受任何约束的壳体。经受均匀温度变化时,壳体可以自由膨胀或收缩,因而,温度变形不引起热应力。若温度分布不均匀,或壳体某部分位移受到限制,壳体中将产生热应力。 1 均匀温度场内双层圆柱壳中的热应力若两壳体由不同材料做成,弹性模量和热膨胀系数分别为:E_1、α_1;E_2、α_2。由于 First, the shell of several typical thermal stress For any unrestricted shell. When subjected to a uniform temperature change, the housing is free to expand or contract, so that the temperature deformation does not cause thermal stress. If the temperature distribution is not uniform, or the displacement of a part of the shell is limited, the shell will generate thermal stress. Thermal stress in a double-layer cylindrical shell in a uniform temperature field If the two shells are made of different materials, the elastic modulus and thermal expansion coefficient are respectively E_1, α_1; E_2, α_2. due to