Al_2O_3纤维增强Al合金复合材料界面孔隙率测定及复合材料应力分布有限元计算

Measurement of Interfacial Porosity and Finite Element Analysis of Stress Distribution in Al_2O_3-Fiber-Reinforced Aluminium Alloy Composites

利用挤压铸造法制备了 Al2 O3纤维增强 Al合金复合材料 ,对其界面孔隙率进行了测定 ,结合拉伸强度数据 ,讨论孔隙率对复合材料强度的影响 ;并通过有限元计算 ,分析了与拉伸轴平行、成 45°及与拉伸轴垂直的 3种纤维模型 ,得出纤维、基体、界面处应力分布。

Al2O3-fiber-reinforced aluminium alloy composites were prepared using squeeze cast method, and porosity of the composites was measured. The influence of the porosity on tensile strength of the composites is discussed. Three models of the composites (fiber being parallel, perpendicular and at an angle of 45 degrees to tensile axis) are analyzed using finite element, and the stress distribution in fiber, matrix and at interface are discussed in detail.