First , mathematical expressions for hoop strain based on linear elasticity theory and deformation plasticity theory , and thus diametral strain is derived 模型推导过程是:首先根据线性弹性理论和变形塑性理论推导出周向应变的数学表达式,进而导出径向应变。
Many scholars have done extensive research on spacial frame optimization design . but these studies are almost based on the theory of limited flexibility in small deformation linear elasticity theory , without considering the structure of the nonlinear element 对于空间刚架结构形状优化问题,许多学者都进行了广泛的研究,但研究内容几乎都是基于小变形线弹性理论的有限元法,而未考虑结构的非线性因素。