复合材料全寿命范围E -N 曲线方程与S-N 曲线方程

基金项目: 国家自然科学基金资助项目(19802001)

详细信息

S-N EQUATION AND E-N EQUATION OVER ALL-LIFE RANGE OF COMPOSITE MATERIAL

Research Center of Solid Mechanics, Beijing University of Aeronautics &|Astronautics, Beijing 100083, China

摘要

摘要: 首先提出了两个新的复合材料全寿命范围的E -N 曲线方程与S -N 曲线方程, 与过去的双参数和三参数曲线公式相比, 此二方程因均有四个参数而具有更好的物理性质; 然后采用相关系数最优法, 分别给出了两个方程的参数估计公式和求解方法, 最后给出了该二方程的应用实例, 通过实例发现: 两个方程均具有良好的拟合效果, 且便于实际应用。
- 复合材料 /
- 全寿命范围 /
- S-N 曲线 /
- E-N 曲线
Abstract: Two new equations of the S N curve equation and the E N curve equation are presented in this paper. These equations are with four parameters, therefore they have better physical properties than those with two or three parameters. By means of the optimization method of correlation coefficient the parameter estimation formulas and numerical solutions of these equations are established. Finally, two examples of these equations application are given. From these examples, iTis shown that the equations are not only of excellent fitting effect, but also convenient for application.
- composite material /
- all life range /
- S N curve /
- E N curve