航空铝钛合金自冲铆接成形机理及力学行为研究

扫码查看

原文链接

万方数据

中文摘要：自冲铆接技术作为新型连接技术，在薄板材料的连接中具有优异的连接性能，在航空工业中有着广阔的应用场景。选用5A06铝合金和TA1钛合金薄板进行自冲铆接，对其成形过程进行有限元分析，通过进行常温与-30℃环境下拉伸剪切试验，探究不同材料和温度对接头静力学性能和失效形式的影响。结果表明，同质接头铆接成形对称性良好，铆接较硬板材容易出现空腔;低温环境下，接头载荷峰值均值均有所下降，但失效位移均值和能量吸收均值都大幅提升，提高了接头的缓冲吸振能力;5A06-5A06接头(SAA接头)在-30 ℃下的载荷峰值均值降低了 13。6％，TA1-TA1接头(STT接头)在-30 ℃下载荷峰值均值降低了 6。6％，说明STT接头有较好的抗低温性能;在常温和低温环境下，SAA接头均为拉脱失效，失效点发生塑性变形，STT接头在低温下铆钉开裂数量增多，裂纹扩展起点为脆性断裂，扩展边缘为韧性断裂。

外文标题：Study on forming mechanism and mechanical behavior of self-piercing riveting of aerospace aluminum and titanium alloys

外文摘要：Self-pierce riveting technology,as a new connection technology,has excellent connection performance in the connection of thin plate materials and has a wide application scenario in the aerospace industry.5A06 aluminum alloy and TA1 ti-tanium alloy thin plate were selected for self-piercing riveting,and the forming process was subjected to finite element analysis.The effects of different materials and temperatures on the static mechanical properties and failure forms of the joint were investigated by conducting tensile-shear tests at room temperature and-30 ℃ environment.The results showed that the homoge-neous joints were formed with good symmetry,and the cavities were easy to appear in the riveted harder plates;the average peak load of the joints decreased at low-temperature environment,but the average failure displacement and the average energy absorp-tion increased significantly,which improved the cushioning and shock absorption ability of the joints;the average peak load of 5A06-5A06 joints(SAA joints)decreased by 13.6％at-30℃,and the average peak load of TA1-TA1 joints(STT joints)showed a 6.6％decrease at-30 ℃,which indicates that STT joints have better low-temperature resistance;under both room-temperature and low-temperature environment,SAA joints failed by pull-off and plastic deformation occurred at the failure point,STT joints showed an increase in the number of rivet cracks at low temperature,with brittle fracture at the beginning of crack expansion and ductile fracture at the edge of expansion.

外文关键词：

lightweightingself-piercing rivetingnumerical simulationmechanical propertiesfailure formsmicroscopic analysis

作者：

高山凤、雷乐、赵伦、叶凯、李承旺、赵升升、宋振东、鲍丹阳

展开 >

作者单位：

山西大学自动化与软件学院,太原 030006

深圳职业技术大学智能制造技术研究院,深圳 518055

关键词：

轻量化自冲铆接数值模拟力学性能失效形式微观分析

基金：

国家自然科学基金高层次人才科研启动基金深圳市优秀科技创新人才培养项目广东省普通高等学校特色创新项目博士后基金启动项目(科技类)

项目编号：

121043246022310046kRCBS20210706092213010504-6020210006T6022331003K

出版年：

2024

DOI：

10.16731/j.cnki.1671-3133.2024.04.001

现代制造工程

北京机械工程学会北京市机械工业局技术开发研究所

现代制造工程

CSTPCD北大核心

影响因子：0.374

ISSN：1671-3133

年,卷(期)：2024.(4)

参考文献量11