Transactions of Materials and Heat Treatment

Title：Bending springback prediction on 90° elbow half plate

Authors： Liu Jingbo Duan Mingde Zhang Zhuangya Yang Baoxu

Unit： School of Mechanical and Electrical Engineering Henan University of Science and Technology

KeyWords： 90° elbow theory of thick wall shear deformation bending springback

ClassificationCode：TG301

year,vol(issue):pagenumber：2019,44(10):71-77

Abstract：

For the problem of large springback for 90° elbow half plate in bending, a method combining theoretical analysis and finite element analysis was proposed, and the process of formula derivation was simplified to calculate the theoretical springback easily. Based on the theory of thick wall and considering the influence of shear deformation, the undetermined coefficients in the analytical formula was determined by analyzing the feature of analytical formula, setting undetermined coefficients, reducing the model hypothesis and combining the result of FEA, and the theoretical springback after bending was calculated. Then the,bending experiment of 90° elbow half plate was carried out, and the theoretical analysis results without and with considering shear deformation were compared with the results of experiment. The results show that the theoretical analysis results relatively match the experimental results, and the theoretical results with considering shear deformation are closer to the experiment results as well. Thus, the correctness of this prediction method for springback is verified to provide a reference for the condition prediction and the calculation springback of 90° elbow half plate in bending.

Funds：

河南省重点科技攻关项目（152102210281）; 河南省高等学校重点科研项目（16A460017）

作者简介：刘静波（1994-），男，硕士研究生 E-mail：liujing_bo@yeah.net 通讯作者：段明德（1966-），男，博士，教授 E-mail：duan_mingde@163.com

Reference：

［1］居大伟，张建. 大口径弯头挤压弯曲成形数值模拟分析
［J］. 机械设计，2010，27(10)：82-85.

Ju D W, Zhang J. Numerical simulation and analysis on extrusion and bending process of large diameter elbow
［J］. Journal of Mechanical Design, 2010, 27(10): 82-85.

［2］Panthi S K, Ramakrishnan N. Semi analytical modeling of springback in arc bending and effect of forming load
［J］. Transactions of Nonferrous Metals Society of China, 2011, 21(10): 2276-2284.

［3］Xue P, Yu T X, Chu E. Theoretical prediction of the springback of metal sheets after a double-curvature forming operation
［J］. Journal of Materials Processing Technology, 1999, 89-90(3): 65-71.

［4］Yang X, Choi C, Sever N K, et al. Prediction of springback in air-bending of advanced high strength steel (DP780)considering Young′s modulus variation and with a piecewise hardening function
［J］. International Journal of Mechanical Sciences, 2016, 105: 266-272.

［5］段永川，官英平，赵军. 拼焊宽板V形自由弯曲回弹预测及试验验证
［J］. 机械工程学报，2012，48(20)：63-69.

Duan Y C, Gan Y P, Zhao J. Prediction and experiment verification of spring-back of tailor welded blanks air bending process
［J］. Journal of Mechanical Engineering, 2012, 48(20): 63-69.

［6］张冬娟，崔振山，李玉强，等. 宽板大曲率半径纯弯曲回弹量理论解析
［J］. 工程力学，2006，23(10)：77-81.

Zhang D J, Cui Z S, Li Y Q, et al. The springback of wide metal sheet after large radius pure bending
［J］. Engineering Mechanics, 2006, 23(10): 77-81.

［7］刘贞伟，郭运. 基于Yoshida_Uemori材料模型的整形工艺超高强钢地板纵梁的回弹分析
［J］. 锻压技术，2018，43(10)：62-67.

Liu Z W, Guo Y. Springback analysis on sizing process of longitudinal floor beam for super high strength steel based on Yoshida_Uemori material model
［J］. Forging & Stamping Technology, 2018, 43(10): 62-67.

［8］余同希，章亮炽. 塑性弯曲理论及其应用
［M］. 北京：科学出版社，1992.

Yu T X，Zhang L C. The Theory and Application of Plastic Bending
［M］. Beijing: Science Press, 1992.

［9］赵长明. 宽厚板压弯回弹预测模型研究
［D］. 河北：燕山大学，2016.

Zhao C M. Study on Prediction Model of Plate Bending Springback
［D］. Hebei: Yanshan University, 2016.

［10］薛克敏，孙大智，李萍，等. 22MnB5超高强钢热冲压成型工艺及试验
［J］. 中国机械工程，2017，28(12)：1498-1503.

Xue K M, Sun D Z, Li P, et al. Hot stamping forming process and experiments of 22MnB5 ultra-high strength steels
［J］. China Mechanical Engineering, 2017, 28(12): 1498-1503.

［11］朱旭霞，彭大暑，黎祚坚. 船体中厚钢板局部热压成形中的回弹仿真分析
［J］. 中国舰船研究，2017，(4)：914-918.

Zhu X X, Peng D S, Li Z J. Numerical simulation of springback of medium-thick plates in local hot rolling
［J］. Chinese Journal of Ship Research, 2017，(4): 914-918.

［12］姜志琳，赵均海，吕美彤，等.基于线性强化模型的双层厚壁圆筒极限内压统一解
［J］.工程力学，2018，35(S1)：6-12.

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