双金属复合板材辊式矫直的数值模型<sup>*</sup>

doi:10.11901/1005.3093.2014.020

材料研究学报

2014, Vol. 28

Issue (4): 308-313 DOI: 10.11901/1005.3093.2014.020

本期目录 | 过刊浏览

双金属复合板材辊式矫直的数值模型^*

王效岗(

),李乐毅,王海澜,周存龙,黄庆学

太原科技大学冶金设备设计理论与技术省部共建国家重点实验室培育基地太原 030024

Numerical Modeling for Roller Leveling Process of Bimetal-Plate

Xiaogang WANG(

),Yueyi LI,Hailan WANG,Cunlong ZHOU,Qinxue HUANG

Shanxi Provincial Key Laboratory of Metallurgical Device Design Theory and Technology (State Key Laboratory Cultivation Base of Province-Ministry Co-Construct), Taiyuan University of Science and Technology, Taiyuan 030024

引用本文:

王效岗,李乐毅,王海澜,周存龙,黄庆学. 双金属复合板材辊式矫直的数值模型^*[J]. 材料研究学报, 2014, 28(4): 308-313.
Xiaogang WANG, Yueyi LI, Hailan WANG, Cunlong ZHOU, Qinxue HUANG. Numerical Modeling for Roller Leveling Process of Bimetal-Plate[J]. Chinese Journal of Materials Research, 2014, 28(4): 308-313.

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摘要:

将弯曲分层矫直数值计算和实验验证相结合, 研究了双金属复合板材辊式矫直过程中的连续弯曲变形和力能参数。结果表明, 使用弯曲分层矫直计算模型是计算双金属复合板材矫直过程的有效方法, 分层算法的结果与实验数据有较好的一致性; 双金属复合板材弯曲应变的中性层与几何中间层产生偏离, 中性层位置随弯曲程度和材料比例而变化; 同时, 由于材料的力学性能不同, 在同一弯曲单元内各组元材料的塑性层比例也不同; 计算模型所给出的在双金属复合板材矫直过程中应力应变的演化, 与单一材料有明显的不同; 在不考虑原始曲率的前提下, 矫后残余应力随着弯曲单元的增加而减小。

关键词 ：材料科学基础学科, 矫直模型, 数值计算, 中性层, 残余应力

Abstract：

The bending stress and strain of bimetal plate during roller leveling process are studied by means of both numerical analysis and experimental verification. The results show that the calculated results are agreed fairly well with the measured data. There is a deviation between the positions of the neutral layer of strain and the geometric middle of the plate thickness. At the same time this deviation changes with the ratio of the thickness of the two metallic materials, as well as the bending degree of bimetal plate. Furthermore, the percentage of the plastic layer for each of the two metallic materials in one bent unit is different owing to the difference of their mechanical property, while the roller leveling induced residual stress decreases with the increasing number of bent units.

Key words： foundational discipline in materials science leveling model numerical calculation neutral layer residual stress

收稿日期: 2014-01-09

基金资助:*国家青年科学基金51104101, 973计划前期研究专项2012CB722801,山西省基础研究计划项目2011021019-4 以及山西省回国留学人员科研项目2013-099 资助。

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https://www.cjmr.org/CN/10.11901/1005.3093.2014.020 或 https://www.cjmr.org/CN/Y2014/V28/I4/308

图1 双金属复合板材(阴影-覆盖层, 白色-基层)

图2 双金属复合板材弯曲变形和弯曲单元的分层

图3 算法采用的材料应力应变模型

表1 试验材料组元的力学性能

图4 截面内应力应变的分布

图5 截面内应力应变的分布

图6 实验用试样

表2 矫直力的实验数据与理论计算

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