| 引用本文: | 于成龙,王俊彪,王永军.基于指数强化模型的预拉力影响角型材拉弯的回弹分析[J].材料科学与工艺,2011,19(1):131-134,138.DOI:10.11951/j.issn.1005-0299.20110126. |
| YU Cheng-long,WANG Jun-biao,WANG Yong-jun.The analysis on the effect of pre-stretch force on spring-back of rotary stretch bending of L-section extrusions based on power-law hardening model[J].Materials Science and Technology,2011,19(1):131-134,138.DOI:10.11951/j.issn.1005-0299.20110126. |
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| 摘要: |
| 为从理论上研究预拉力对角型材拉弯回弹的影响,采用指数强化材料模型,在分析角型材截面应力应变分布的基础上,建立了型材转台式拉弯解析模型.分析讨论了预拉力对角型材截面应力分布和加载弯矩的影响规律,并计算得到了回弹角随预拉力变化的规律曲线.与采用双线性强化材料模型的解析计算结果比较表明:采用指数强化材料模型计算的回弹结果与实验数据更吻合. |
| 关键词: 回弹 解析模型 转台式拉弯 预拉力 |
| DOI：10.11951/j.issn.1005-0299.20110126 |
| 分类号:TG115.52 |
| 基金项目:国家高技术研究发展计划资助项目(2001AA421130) |
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| The analysis on the effect of pre-stretch force on spring-back of rotary stretch bending of L-section extrusions based on power-law hardening model |
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YU Cheng-long1, WANG Jun-biao2, WANG Yong-jun2
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1.School of Mechanical Engineering and Automation,Beihang University,Beijing 100083 China;2.School of Mechatronics,Northwestern Polytechnic University,Xi’an 710072 China
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| Abstract: |
| To theoretically study of pre-stretch force effect on spring-back of L-section extrusions in rotary stretch bending,an analytical model of stress and strain distributions in section is presented with using power-law harden material constitutive model.The variations of stress distributions with pre-stretch force in section are analyzed and discussed as well as applied bending moment,and also a curve that spring-back angle varying with pre-stretch force is presented.The results compared with experimental data show that the analytical model is more accurate to predict spring-back than another one built by using bilinear harden constitutive model in rotary stretch bending. |
| Key words: spring-back analytical model rotary stretch bending pre-stretch force |
