细化钨合金力学性能研究与数值模拟  

Experimental Study and Numerical Simulation on the Mechanical Behavior of Tungsten Alloys

作　　者：宋卫东[1] 刘海燕[2] 宁建国[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]北京理工大学理学院,北京100081

出　　处：《北京理工大学学报》2007年第9期756-760,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(10602008)

摘　　要：针对晶粒度分别为1-3μm,10-15μm,30-40μm的细化钨合金材料,采用单轴拉伸实验研究了3种材料在准静态条件下的力学性能,获得了3种材料在不同加载速率下的应力-应变曲线和静力学基本参数.在实验的基础上,运用有限元计算软件ANSYS,建立了能够反映钨合金材料微观结构特征的计算模型,模拟了不同体积分数、不同颗粒形状、不同晶粒度钨合金材料在静态拉伸载荷作用下的力学性能,给出了钨合金材料的应力-应变曲线,分析了钨合金力学性能与钨合金各微观参量之间的关系.The tensile tests have been conducted to investigate the mechanical behavior of tungsten alloys with three kinds of grain sizes 1- 3 μm, 10-15 μm and 30- 40 μm. The stress-strain curves and the quasi-static parameters under different loading velocities were obtained. Based on the experimental results, the finite element program ANSYS was adopted to build the numerical model of the tungsten alloys with the microstructure characteristics. Dozens of cases were performed to analyze the effect of W content, grain shape, and grain size on the mechanical behavior of the tungsten alloys under quasi-static tension load. The stress-strain curves were given and the relation between the mechanical characteristics of the tungsten alloys and the micro-parameters of the tungsten alloys was explored.

关 键 词：钨合金 晶粒度 力学性能 数值模拟 

分 类 号：O344.1[理学—固体力学]