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| 铝合金泡沫金属夹层板自冲铆接头力学性能研究 |
| Study on mechanical properties of self-piercing riveted joints of aluminum alloy metal foam sandwich sheet |
| Received:February 09, 2017 Revised:March 13, 2017 |
| DOI：10.7520/1001-4888-17-020 |
| 中文关键词: 自冲铆 泡沫金属 夹层板 力学性能 断口分析 |
| 英文关键词:self-piercing riveting metal foam sandwich sheet mechanical properties fracture analysis |
| 基金项目:国家自然科学基金 (51565023, 51565022)； 云南省教育厅科学研究基金重大专项 (ZD201504) |
| Author Name | Affiliation | | LIU Yang | Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China | | HE Xiao-cong* | Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China | | ZHAO De-suo | Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China | | XING Bao-ying | Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China |
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| 中文摘要: |
| 对AA5052铝合金泡沫金属夹层板进行自冲铆接试验，对接头的可连接性进行探究。通过静力学试验对比各组接头的静力学性能，分析不同种类泡沫金属对自冲铆接头力学性能的影响；用扫描电子显微镜对接头典型断口进行研究，分析其微观失效机理。结果表明：自冲铆技术可以实现泡沫金属夹层板的有效连接，接头具有良好的成形质量；泡沫金属夹层提高了自冲铆接头的静力学性能，其中泡沫镍夹层使AA5052自冲铆接头静失效载荷提高了4.1%；夹层板自冲铆接头失效形式均为铆钉与下板分离，其中泡沫铁镍夹层自冲铆接头下板铆扣断裂区域粘附在铆钉脚底部，为韧性断裂机制；下板内锁区域失效时铆钉与下板发生剧烈刮擦，呈现具有分层现象的片状组织。 |
| 英文摘要: |
| Self-piercing riveting tests of AA5052 aluminum alloy metal foam sandwich sheet was carried out to investigate the join-ability. Static properties of each group of joints were compared by static tests, and the influnence of different kinds of metal foam on mechanical properties of self-piercing riveted joints were analyzed. Typical joint fracture was investigated by scanning electron microscope, and the microscopic failure mechanism was analyzed. Results show that self-piercing riveting can realize effective connection of metal foam sandwich sheet, and the joint has good forming quality. The metal foam interlayer improves the static performance of self-piercing riveted joint. Among them, the nickel foam interlayer makes static failure load of AA5052 self-piercing riveted joint to increase by 4.1%. The failure mode of self-piercing riveted joint of sandwich sheet is the separation of rivet from lower sheet. The fracture region of the lower sheet of self-piercing riveted joint of iron-nickel foam sandwich sheet attached at the bottom of the rivet tail, exhibiting ductile fracture mechanism; the rivet and the lower sheet scratch violently when the inner lock region fails, showing a lamellar structure with delamination. |
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