一种预测板材成形回弹的新的自适应无网格法

doi:10.13196/j.cims.2018.01.007

计算机集成制造系统 ›› 2018, Vol. 24 ›› Issue (第1): 72-79.DOI: 10.13196/j.cims.2018.01.007

一种预测板材成形回弹的新的自适应无网格法

刘红生^1,2,江开勇¹⁺,崔俊佳²,周广涛¹,刘华¹,王霏¹,郑清娟¹

1.华侨大学福建省特种能场制造重点实验室
2.湖南大学汽车车身先进设计制造国家重点实验室

出版日期:2018-01-31 发布日期:2018-01-31
基金资助:
福建省高校产学合作科技重大资助项目(2017H6012);汽车车身先进设计制造国家重点实验室开放基金资助项目(31515012);华侨大学中青年教师科研提升资助项目(Z15J0002);福建省教育厅资助项目(Z1525123);福建省自然科学基金资助项目(2017J01089);泉州市科技计划资助项目(2015Z127)。

New adaptive meshless method for springback prediction in sheet metal forming

Online:2018-01-31 Published:2018-01-31
Supported by:
Project supported by the Important Plan of Fujian Provincial Science and Technology,China(No.2017H6012),the State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,China(No.31515012),the Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University,China(No.Z15J0002),the Foundation of Education Department of Fujian Province,China(No.Z1525123),the Fujian Provincial Natural Science Foundation,China(No.2017J01089),and the Quanzhou Science and Technology Plan,China(No.2015Z127).

摘要/Abstract

摘要： 先进高强钢成形后回弹严重影响成形件形状精度,为准确预测并控制回弹,提出一种新的多尺度无网格自适应分析方法,优化工艺参数,降低回弹提高成形精度。利用无网格形函数多尺度特性将应力、应变分解为高、低尺度分量,采用应力、应变高尺度分量表征应力、应变梯度;采取自适应分析技术在高梯度区加密无网格节点;在准确构建先进高强钢本构关系的基础上建立先进高强钢板材成形自适应无网格数值模型。针对先进高强钢U形弯曲进行无网格数值模拟,数值结果表明,所构建的无网格数值模型可准确预测先进高强钢成形后的回弹,有效提高先进高强钢成形质量。

关键词: 自适应无网格法, 先进高强钢, 回弹, 金属板材成形

Abstract: The shape precision of formed part was seriously affected by springback of Advanced High Strength Steel (AHSS) forming.To optimize the process parameters and obtain the precise shape geometries of formed part,an advanced adaptive meshless method was employed to accurately predict the springback of advanced AHSS forming.Stress and strain gradients were described with multi-scale characteristic of meshless shape function by which stress and strain decomposed into high and low scale components.More nodes were distributed automatically in high gradient zone by using a developed adaptive algorithm.An adaptive meshless numerical model of AHSS forming was constructed based on building constitutive relation of AHSS accurately.Numerical simulations for U-bending process of AHSS were performed,and the numerical simulation results showed that the proposed meshless numerical model could accurately predict the springback of AHSS forming process and improve the forming quality of AHSS.

Key words: adaptive meshless method, advanced high strength steel, springback, sheet metal forming

中图分类号:

TG386

刘红生,江开勇,崔俊佳,周广涛,刘华,王霏,郑清娟. 一种预测板材成形回弹的新的自适应无网格法[J]. 计算机集成制造系统, 2018, 24(第1): 72-79.

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一种预测板材成形回弹的新的自适应无网格法

New adaptive meshless method for springback prediction in sheet metal forming

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