| 宽板塑性弯曲成形过程中的板厚变化规律 |
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| 引用本文： | 罗文波. 宽板塑性弯曲成形过程中的板厚变化规律[J]. 力学与实践, 2004, 26(3): 46-47 |
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| 作者姓名： | 罗文波 |
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| 作者单位： | 湘潭大学基础力学与材料工程研究所,湘潭,411105 |
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| 基金项目： | 湖南省教育厅青年项目(O2BOO5) |
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| 摘 要： | 根据宽板弯曲过程中的变形与应力分布特征,提出了一种计算弯曲过程中板料厚度随弯曲程度变化的新的近似解答方法．该方法基于塑性增量理论,应用塑性成形过程的体积不变假设和弯曲过程的平面假设．作为算例,得到了理想刚塑性材料的板料厚度、变薄系数以及应变中性层内移系数随板料弯曲内表面曲率半径变化的规律,并与实验数据进行了比较,两吻合良好．
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| 关 键 词： | 板材弯曲成形 变薄系数 理想塑性 |
| 修稿时间： | 2003-04-23 |
THICKNESS VARIATION IN FORMING BY PLASTIC BENDING OF WIDE SHEET |
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| LUO Wenbo Institute of Fundamental Mechanics & Material Engineering,Xiangtan University,Xiangtan ,China. THICKNESS VARIATION IN FORMING BY PLASTIC BENDING OF WIDE SHEET[J]. Mechanics and Engineering, 2004, 26(3): 46-47 |
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| Authors: | LUO Wenbo Institute of Fundamental Mechanics & Material Engineering Xiangtan University Xiangtan China |
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| Affiliation: | LUO Wenbo Institute of Fundamental Mechanics & Material Engineering,Xiangtan University,Xiangtan 411105,China |
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| Abstract: | A new approximate solution to thickness re-duction of plastic bending sheet is presented by considering the characteristics of deformation and stress distribution. The proposed method is based on the incremen-tal theory,and volume invariance and planar cross-sectionare assumed. As a calculation example, the sheet reduc-tion ratio and the distance from the neutral plane to in-ner boundary are calculated and compared with publisheddata. A fairly good agreement is obtained between thecalculated results and the experimental data. |
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| Keywords: | sheet bending forming thickness reduction ratio perfect plasticity |
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