锻压技术

TC4钛合金连接板抽芯铆接数值模拟

英文标题：Numerical simulation on core riveting for TC4 titanium alloy connecting plate

作者：黄伟古忠涛陈薄赵天

单位：西南科技大学

分类号：TG938

出版年,卷(期):页码：2023,48(11):95-103

摘要：

以某型高速战机的TC4钛合金蒙皮的抽芯铆接工艺为研究对象，基于ABAQUS有限元软件对TC4钛合金连接板的抽芯铆接过程进行了数值模拟，并通过抽芯铆接试验验证了有限元模型的准确性，分析探讨了抽芯铆钉和连接板的变形情况、残余应力和残余应变。结果表明：在抽芯铆接过程中，钉杆断颈槽部位、锁紧环、镦头部位和铆钉孔附近产生了明显的应力集中；越靠近镦头部位，金属材料流动越剧烈。抽芯铆接完成后，残余应力主要分布在钉杆断颈槽部位、锁紧环、镦头部位、铆钉孔附近,其中，钉杆断裂位置的残余应力最大，约为1015 MPa；残余应变主要分布在镦头部位、锁紧环、铆钉孔附近，其中，镦头部位残余应变最大，约为0.49。

For the core riveting process of TC4 titanium alloy skin of a certain high-speed aircraft, the core riveting process of TC4 titanium alloy connecting plate was numerically simulated by finite element software ABAQUS. Then, the accuracy of finite element model was verified through core riveting tests, and the deformation condition, residual stress and residual strain of core rivet and connecting plate were analyzed and discussed. The results show that during the core riveting process, the obvious stress concentration occurs near the broken neck groove of nail rod, locking ring, rivet head and rivet hole. The closer to the rivet head, the more violent the metal material flows. After the core riveting is completed, the residual stress is mainly distributed in the broken neck groove of nail rod, locking ring, rivet head and rivet hole. Among them, the residual stress at the broken position of nail rod is the maximum value, namely, about 1015 MPa. The main distribution areas of residual strain are around the rivet head, locking ring and rivet hole. Among them, the residual strain at the rivet head is the maximum value, about 0.49.

基金项目：

作者简介：黄伟（1993-），男，硕士，E-mail：1366156515@qq.com；通信作者：古忠涛（1970-），男，博士，副教授，E-mail：guzhongtao2005@163.com

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