We first improve the complementary variational principle.
首先改进互补变分原理。
By the use of the variational principle of complementary energy, the closed form of the stresses of double-layer composite bar is obtained.
运用最小余能原理，求得了双层复合材料杆温度应力的封闭解。
Finite Elemnent-Linear Complementary Equation is established for analysis of elastoplastic thin plate-bending problems based on variational inequality principle.
从变分不等式出发，结合有限元，建立了按增量求解薄板弹塑性弯曲问题的线性互补方程。
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