硅酸铝短纤维增强AZ91D镁基复合材料蠕变力学行为的微观数值模拟

田君; 陈洲泉; 钟守炎

doi:10.3879/j.issn.1000-0887.2014.05.006

硅酸铝短纤维增强AZ91D镁基复合材料蠕变力学行为的微观数值模拟

doi: 10.3879/j.issn.1000-0887.2014.05.006

¹东莞理工学院机械工程学院,广东东莞 523808;²华南理工大学材料科学与工程学院,广州 510640

基金项目: 广东省自然科学基金（10151170003000002）

详细信息

作者简介:
田君（1968—），男，湖南人，副教授，博士，硕士生导师(通讯作者. Tel: +86-769-22861281; E-mail: 841608534@qq.com)

中图分类号: O346;TG113
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出版历程
- 收稿日期: 2013-06-17
- 修回日期: 2014-03-21
- 刊出日期: 2014-05-15

Micro Numerical Simulation of Creep Mechanical Behavior of Aluminum Silicate Short Fiber-Reinforced AZ91D Magnesium Matrix Composite

¹School of Mechanical Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, P.R.China;²School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P.R.China

摘要

摘要: 研究了硅酸铝短纤维增强AZ91D镁基复合材料蠕变力学行为的细观机理，采用单胞模型结合有限元软件ABAQUS进行分析.有限元分析表明，纤维和基体中的应力应变大致为分段均匀分布，纤维远比基体承担的等效Mises应力大，基体和纤维的界面处存在较大的应力集中.复合材料的蠕变断裂经历3个微观进程，随着蠕变变形的增大，短纤维通过多处损伤、断裂和多重断裂来承担和传递载荷而加强了基体的蠕变抗力，弱界面产生的微裂纹不断扩大导致复合材料抗蠕变能力急剧下降而断裂.
- 镁基复合材料 /
- 单胞模型 /
- 有限元 /
- 蠕变断裂 /
- 轴应力
Abstract: A research was conducted on the micro mechanism of the creep mechanical behavior of aluminum silicate short fiber-reinforced AZ91D magnesium matrix composite. The unit cell model was applied together with the finite element method (FEM) of ABAQUS to simulate the composite. The FEM results show that the distribution of stress and strain in the fiber and matrix is roughly uniform in each segment, the fiber assumes far higher equivalent Mises stress than the matrix, and there is distinct stress concentration around the interface between the matrix and the fiber. The creep fracture of the composite goes through three microscopic processes. With the increase of creep deformation, the short fiber bears and transfers the load with various damages, fracture and multiple fracture, which strengthens the creep resistance of the matrix. The micro-cracks generated at the weak interface continue to expand, causing sharp fall of the creep resistance and in turn fracture of the composite.
- magnesium matrix composite /
- unit cell model /
- finite element method /
- creep fracture /
- axial stress

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参考文献(23)

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硅酸铝短纤维增强AZ91D镁基复合材料蠕变力学行为的微观数值模拟

doi: 10.3879/j.issn.1000-0887.2014.05.006

作者简介:
田君（1968—），男，湖南人，副教授，博士，硕士生导师(通讯作者. Tel: +86-769-22861281; E-mail: 841608534@qq.com)

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Micro Numerical Simulation of Creep Mechanical Behavior of Aluminum Silicate Short Fiber-Reinforced AZ91D Magnesium Matrix Composite

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硅酸铝短纤维增强AZ91D镁基复合材料蠕变力学行为的微观数值模拟

doi: 10.3879/j.issn.1000-0887.2014.05.006

作者简介: 田君（1968—），男，湖南人，副教授，博士，硕士生导师(通讯作者. Tel: +86-769-22861281; E-mail: 841608534@qq.com)

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Micro Numerical Simulation of Creep Mechanical Behavior of Aluminum Silicate Short Fiber-Reinforced AZ91D Magnesium Matrix Composite

计量

出版历程

目录

作者简介:
田君（1968—），男，湖南人，副教授，博士，硕士生导师(通讯作者. Tel: +86-769-22861281; E-mail: 841608534@qq.com)