|
|||||
|
|
| 铝合金 2A12韧性断裂机制的实验研究 | |
| 引用本文： | 李棠,王清远,岳珠峰.铝合金 2A12韧性断裂机制的实验研究[J].实验力学,2006,21(6):763-768. |
| 作者姓名： | 李棠 王清远 岳珠峰 |
| 作者单位： | 1. 西南科技大学,土木工程与建筑学院,绵阳,621010;四川大学,建筑与环境学院,成都,610065 2. 四川大学,建筑与环境学院,成都,610065 3. 西北工业大学,力学与土木工程学院,西安,710072 |
| 基金项目： | 教育部新世纪优秀人才计划项目(NECT-04-0877) |
| 摘 要： | 用轴对称圆棒静拉伸实验研究了铝合金2A12韧性断裂的特点,并探讨了临界空穴扩张比参数-VGC在实验材料上的适用性。实验测试了实验材料的拉伸特性参数及VGC参数。实验证实实验材料在不同应力状态下会发生断裂形式的转变,光滑试样表现为剪切破坏,而缺口试样为拉伸破坏,VGC参数对材料的断裂形式较为敏感。用SEM观测了试样断口显示缺口试样为空穴聚合型断裂机制。VGC参数只适用于以拉伸型断裂为主的缺口试样,对以剪切断裂为主的光滑拉伸试样不适用。 |
| 关 键 词： | 铝合金 剪切断裂 拉伸断裂 临界空穴扩张比参数V_(GC) 应力三维度 |
| 文章编号： | 1001-4888(2006)06-0763-06 |
| 收稿时间： | 2005-08-24 |
| 修稿时间： | 2006-10-13 |
Experimental Studies on Ductile Fracture Mechanism of Aluminum Alloy 2A12 |
|
| LI Tang,WANG Qing-yuan,YUE Zhu-feng.Experimental Studies on Ductile Fracture Mechanism of Aluminum Alloy 2A12[J].Journal of Experimental Mechanics,2006,21(6):763-768. | |
| Authors: | LI Tang WANG Qing-yuan YUE Zhu-feng |
| Abstract: | In the present paper, axisymmetric bars were tensioned as static load for investigating the ductile fracture behavior and evaluating the suitability for the critical void growth ratio, V_(GC) of aluminum alloy 2A12. The tensile properties and V_(GC) parameter of the material were studied. It's found that fracture morphology of the material is different under different stress states; the ductile fracture parameter V_(GC) is sensitive to the fracture mode. The SEM was adopted to study the micro-fracture mechanism of the material. It is identified that the notched specimen has the void coalescence mechanism, while V_(GC) is only applicable to this case. |
| Keywords: | aluminum alloy shear fracture tensile fracture critical void growth ratio V_(GC) stress triaxiality ratio |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《实验力学》浏览原始摘要信息 | |
| 点击此处可从《实验力学》下载免费的PDF全文 | |