stress-strain matrix

In this paper, the element tangent stiffness matrix of spatial fold cable element under initial stress condition and nonlinear simultaneous equations for finite element method which can be used in nonlinear analysis and calculation of prestressed lattice structures are developed by studying the prestressed cable element.

通过对于预应力索单元的分析研究，推导了具有初始应力的空间折索单元的单元切线刚度矩阵的计算公式，并且建立了可用于预应力空间网格结构非线性有限元分析的非线性方程组。

The Precision Measure and the Criterion Matrix of Three-Dimensional Stress Parameters for Monitoring Networks

监测网的精度测度与三维应变参数的准则矩阵

The whole tension strength of steel fiber reinforced self-stressing concrete is a combination of tension strength of matrix and the self-stress value;

钢纤维自应力混凝土抗拉强度为混凝土基体的抗拉强度与自应力值之和；

The matrix and fiber are assumed elastic, and the sliding rate is proportional to the shear stress on the interface.

基体和纤维为弹性的，而界面滑动速率正比于界面剪应力。

The traditional shear lag theory of stress transfer in short fiber reinforced metal matrix composites was modified and improved.

对短纤维增强金属基复合材料应力传递的传统剪滞理论进行了修正和改进。