铝合金材料断裂形式变化规律的试验分析  

The Experiment Analysis for Fracture Laws of Aluminum Alloy Materials

作　　者：汤安民[1] 刘泽明[1] 

机构地区：[1]西安理工大学理学院机械与精密仪器工程学院,陕西西安710048

出　　处：《西安理工大学学报》2003年第3期226-229,共4页Journal of Xi'an University of Technology

基　　金：陕西省自然科学基金资助项目(2000C28);陕西省教育厅科研基金资助项目(01JK140)。

摘　　要：分析了铝合金材料在常规破坏试验过程中的断裂现象和在不同复合比载荷状态下的断裂力学试验结果,讨论了不同应力三维度下铝合金材料的断裂形式变化规律。研究结果表明,材料在受力过程中的塑性变形是影响材料断裂形式的主要因素,当塑性变形较小时,材料内孔洞易于扩张,材料断裂形式为拉断;当塑性变形较大时,材料内局部剪切带产生扩展,材料断裂形式为剪断。The fracture phenomena of aluminum alloy material in the process of the usual breakage tests are studied. The fracture mechanics test results in the loading state with different compound ratios are analyzed. The ductile fracture modes and change laws of aluminum alloy materials in the case of different stress triaxicity are discussed. It is found that the material fracture mode is mainly effected by the plastic deformation produced in the process of fractures of materials subject to different forces, while the plastic deformation varies from small few to big, the material fracture mechanism is transformed mainly from the hole expansion to the local shearing belt generation and development. 

关 键 词：铝合金 应力三维度 断裂规律 

分 类 号：O346.1[理学—固体力学] TG111.91[理学—力学]