吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (3): 864-871.doi: 10.13229/j.cnki.jdxbgxb201503026

• • 上一篇    下一篇

压印接头强度的有限元模型及理论计算方法

杨慧艳, 何晓聪, 周森   

  1. 昆明理工大学 机电工程学院, 昆明650500
  • 收稿日期:2013-08-23 出版日期:2015-05-01 发布日期:2015-05-01
  • 通讯作者: 何晓聪(1955-),男,教授,博士生导师.研究方向:新轻型薄板材料连接新技术.
  • 作者简介:杨慧艳(1989-),女,博士研究生.研究方向:汽车轻量化-薄板材料连接新技术.
  • 基金资助:
    国家自然科学基金项目(50965009)

Simulation and calculation methods for clinched joint strength

YANG Hui-yan, HE Xiao-cong, ZHOU Sen   

  1. Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
  • Received:2013-08-23 Online:2015-05-01 Published:2015-05-01

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摘要： 建立了压印接头拉剪强度模型并提出接头强度的理论计算方法。建立了压印连接成形的二维模型,模拟压印成型过程并分析金属流动规律,模拟结果与试验结果一致。由压印连接过程的模拟结果得到压印接头的三维模型,由此三维模型模拟接头的拉剪过程,得到接头的载荷-位移曲线和失效形式,模拟结果与试验结果一致,求解误差为3.4%。根据压印接头拉剪的两种失效形式(颈部断裂失效和上下板分离失效),提出了压印接头的理论计算公式。并由12种压印接头对计算公式进行验证,求解结果与试验结果吻合,最大强度误差为8.9%。

关键词: 工程力学, 压印连接, 接头拉剪强度, 计算公式, 数值模拟, 微观组织分析

Abstract: A finite element (FE) model and a theoretical calculation method for the tensile-shear strength of clinched joint were proposed. First, a 2D model for clinching process was established in ANSYS to simulate the performing process and analyze the metal flow law; the simulation results are in accord with the test results. Then, a 3D model for tensile-shear process was constructed from the results of the 2D model; the load-displacement curve and the failure mode were obtained. The simulation results are in good agreement with test results with an error of 3.4%. Finally, theoretical formulas for the calculation of the joint strength was proposed based on the two failure modes in tensile-shear tests, which are neck-fracture failure mode and button separation mode. The formulas were verified by the tests of twelve types of clinched joints. Results show that the calculation error of the joint strength is 8.9%.

Key words: engineering mechanics, clinching, tensile-shear strength, calculating formula, simulation, microscopic analysis

中图分类号: 

  • TG4
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