铝合金型材拉弯有限元模拟

发布时间：2018-06-03 09:03

本文选题：有限元模拟 + 拉弯　；参考：《锻压技术》2015年04期

【摘要】：型材拉弯成形过程模拟属于高度非线性准静态问题,选择动力显示模块进行数值模拟时,需要考虑模拟分析步时间的敏感性。针对通用的型材拉弯工艺,在模拟分析步时间的敏感性分析基础上,采用ABAQUS/Explicit模块,建立了型材拉弯成形的准静态分析有限元模型。并采用ABAQUS/Standard模块分析预测回弹、侧壁厚度和截面畸变。为验证模拟方法的有效性,采用A-7B数控拉弯成形机完成2024-O铝合金Z型截面型材拉弯试验,测量试验件的回弹量、厚度和截面畸变情况。试验与模拟结果对比表明:补拉伸量对回弹量、厚度和截面畸变的影响趋势一致,其中,回弹量和厚度的平均相对误差分别为13.74%,1.66%。建立的模型能有效地应用于铝合金型材拉弯成形模拟。
[Abstract]:The simulation of profile bending process is a highly nonlinear quasi-static problem. When selecting dynamic display module for numerical simulation, the sensitivity of simulation analysis step time should be considered. Based on the sensitivity analysis of simulation and analysis of step time, the quasi-static finite element model of profile bending forming is established by using ABAQUS/Explicit module in allusion to the general profile bending process. The ABAQUS/Standard module is used to predict the springback, the thickness of the side wall and the distortion of the section. In order to verify the effectiveness of the simulation method, A-7B numerical control bending machine was used to complete the tensile bending test of 2024-O aluminum alloy Z section profile, and the springback, thickness and section distortion of the test piece were measured. The results of experiment and simulation show that the effect of supplementary tensile amount on springback, thickness and section distortion is the same, and the average relative error of springback and thickness is 13.7474 and 1.66, respectively. The established model can be effectively applied to the simulation of aluminum alloy profile forming.
【作者单位】：中航工业江西洪都航空工业股份有限公司;西北工业大学机电学院;
【基金】：国家自然科学基金资助项目(51275420) 航空科学基金资助项目(2008ZE53037)
【分类号】：TG306

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