粘弹性物体非定常热应力的计算

CALCULATION OF NON STATIONARY THERMAL STRESS OF VISCOELASTIC OBJECT

考虑到材料的热粘弹性质和物体的非定常温度场分布并依据变温粘弹性松弛型本构物论和有限元方法，编写出适用于各种热粘弹性材料在变温过程中热应力、热变形计算的空间有限元程序。数值计算结果表明，本算法计算精度高。

In consideration of the thermoviscoelasticity of material and the distribuation of the non stationary temperature field of object and of the basis of relaxation constitutive theory of thermoviscoelasticity under non constant temperature and the finit element method, the space finite element program is drawn up, which can be applied to finite element calculation of thermal stress and deformation of all kinds of thermoviscoelastic matorials.Numerical calculation shows this technique may be used effectively to solve many engineering problems.