双相合金钨合金的含损伤本构研究

Study on the Constitutive Relationships Involving Damage Factor for a Dual-Phase Tungsten Alloy

从 Eshelby理论出发 ,采用 Eshelby等效包容体法 ,结合 Mori- Tanaka平均场方法 ,将微孔洞考虑成不同于基体和包容体的第三相 ,建立了双相合金的含损伤本构框架 .将钨和粘结相的热粘塑性本构方程代入后 ,得到了钨合金含损伤本构方程 ,并将其编入一维 L agrange差分程序进行模拟 。

Based on Eshelby's theory and considering the micro voids inside the tungsten alloy as the third phase, a constitutive frame involving damage factor was constructed by means of Eshelby's model of equivalent inclusions and Mori Tanaka uniform field method. Then, introducing the constitutive relationship of tungsten grain and matrix into the above frame, as a result, the constitutive equation involving damage factor of tungsten alloy is obtained. By use of a one dimensional finite differential Lagrange program, the numerical computing of the spalling phenomena of tungsten alloy was made and the agreement of the computing results with the experimental data is pretty well.