真空吸渗挤压二维正交铺层Cf/Al 复合材料压缩失效机制

doi:10.3969/j.issn.1007-2861.2013.07.042

上海大学学报(自然科学版) ›› 2014, Vol. 20 ›› Issue (1): 75-82.doi: 10.3969/j.issn.1007-2861.2013.07.042

真空吸渗挤压二维正交铺层C_f/Al 复合材料压缩失效机制

周计明, 郑武强, 齐乐华, 马玉钦

西北工业大学机电学院, 西安 710072

收稿日期:2013-11-27 出版日期:2014-02-28 发布日期:2014-02-28
通讯作者: 周计明(1976—), 男, 副教授, 博士, 研究方向为金属基复合材料成形工艺及仿真技术等. E-mail:zhoujm@nwpu.edu.cn
基金资助:
国家自然科学基金资助项目(51275417, 51221001); 2013 年度留学人员科技活动择优资助项目(2013164)

Investigation on Compressive Failure Mechanism of 2D Cross-ply C_f/Al Composites by Extrusion Directly Following Vacuum Pressure Infiltration Process

ZHOU Ji-ming, ZHENG Wu-qiang, QI Le-hua, MA Yu-qin

School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China

Received:2013-11-27 Online:2014-02-28 Published:2014-02-28

摘要/Abstract

摘要： 采用真空吸渗挤压技术制备了二维正交铺层碳纤维增强铝基(2D-C_f/Al)复合材料, 研究了室温下2D-C_f/Al 复合材料沿不同方向的压缩性能及其失效行为. 研究结果表明: 利用真空吸渗挤压技术制备的复合材料的浸渗质量良好, 微观组织致密, 基体铝合金和纤维分布均匀, 无明显缺陷存在; 沿垂直于纤维铺层方向的压缩屈服强度约为平行方向的2.5 倍, 比基体铝合金的压缩强度提高了57%. 复合材料的压缩破坏机制与纤维铺层方向密切相关: 当压缩载荷垂直于纤维铺层方向时, 主要以剪切失效为主; 当压缩载荷平行于纤维铺层方向时, 主要以界面脱粘和纤维弯折失效为主.

关键词: 二维正交铺层C_f/Al 复合材料, 失效机制, 压缩性能, 真空吸渗挤压

Abstract: 2D cross-ply carbon fiber reinforced aluminum matrix composites were fabricated by extrusion directly following vacuum pressure infiltration. The compressive property and failure mechanism of 2D-C_f/Al composites were investigated at room temperature by applying loadings along different directions with respect to the fiber layer. The results show that the composite with ideal infiltration quality and dense microstructure could be fabricated successfully by extrusion directly following vacuum pressure infiltration the aluminum alloy and fibers are evenly distributed, and seldom defects can be found in composite. The compression yield strength perpendicular to the fiber layer is almost 2.5 times as that parallel to the fiber layer. Further analysis shows that the different properties are caused by different failure mechanisms. When the loading direction is perpendicular to the fiber layer, composites failure is mainly caused by shear fracture. When the loading direction is parallel to the direction of fiber, interface debonding and fiber bending failure are the main failure mechanism.

Key words: 2D crossply C_f/Al composite, compressive property, extrusion directly following vacuum pressure infiltration technique, failure mechanism

中图分类号:

TB 331

周计明, 郑武强, 齐乐华, 马玉钦. 真空吸渗挤压二维正交铺层C_f/Al 复合材料压缩失效机制[J]. 上海大学学报(自然科学版), 2014, 20(1): 75-82.

ZHOU Ji-ming, ZHENG Wu-qiang, QI Le-hua, MA Yu-qin. Investigation on Compressive Failure Mechanism of 2D Cross-ply C_f/Al Composites by Extrusion Directly Following Vacuum Pressure Infiltration Process[J]. Journal of Shanghai University（Natural Science Edition）, 2014, 20(1): 75-82.

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真空吸渗挤压二维正交铺层C_f/Al 复合材料压缩失效机制

Investigation on Compressive Failure Mechanism of 2D Cross-ply C_f/Al Composites by Extrusion Directly Following Vacuum Pressure Infiltration Process

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真空吸渗挤压二维正交铺层Cf/Al 复合材料压缩失效机制

Investigation on Compressive Failure Mechanism of 2D Cross-ply Cf/Al Composites by Extrusion Directly Following Vacuum Pressure Infiltration Process

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真空吸渗挤压二维正交铺层C_f/Al 复合材料压缩失效机制

Investigation on Compressive Failure Mechanism of 2D Cross-ply C_f/Al Composites by Extrusion Directly Following Vacuum Pressure Infiltration Process