双金属复合板矫直过程的弯曲及弹复解析

发布时间：2018-01-07 20:37

本文关键词：双金属复合板矫直过程的弯曲及弹复解析　出处：《工程科学学报》2016年09期 　论文类型：期刊论文

【摘要】：基于工程弹塑性力学建立了不同组坯方式下双金属复合板弯曲矫直过程截面弹塑性状态演变路径的解析模型.基于该模型分析不锈钢复合板矫直过程中的弯曲回弹特性,解释复合板弯曲回弹过程中截面的反向屈服现象,并将不锈钢复合板与单一材料板材弯曲过程进行对比.研究结果表明:双金属复合板在弯曲过程中截面会经历五种弹塑性状态,并伴随着不同的中性层偏移规律,弯曲回弹后的残余应力分布与单一材料板相比更加不均匀且可能进入反向屈服状态;复合板与单一材料板材的弯矩相对差值随着屈服强度比的增大而增大,其绝对值随着弯曲曲率先增大后减小.
[Abstract]:Based on the engineering elastoplastic mechanics, an analytical model of elastic-plastic state evolution path of the section of bimetallic composite plate in bending straightening process is established under different blank groups. Based on this model, the bending return of stainless steel clad plate during straightening process is analyzed. Bomb properties. The reverse yield phenomenon of the section in the springback process of composite plate is explained. The bending process of stainless steel clad plate and single material plate is compared. The results show that the section of bimetallic composite plate will undergo five elastic-plastic states during the bending process. Along with different neutral layer migration law, the residual stress distribution after bending springback is more uneven than that of single material plate and may enter into reverse yield state. The relative difference of bending moment between composite plate and single material plate increases with the increase of yield strength ratio, and the absolute value increases first and then decreases with bending curve.
【作者单位】：北京科技大学机械工程学院;
【基金】：国家高技术研究发展计划资助项目(2013AA031302) 中国博士后科学基金资助项目(2014M550611) 北京市自然科学基金青年科学基金资助项目(3154036)
【分类号】：TG301
【正文快照】： 金属复合板是使用各种复合技术使金属板材在界面上实现冶金结合的一种复合材料,相比于传统单一材料板材,它具有优异的服役性能与高性价比的特点.石油、化工、海洋工程及造船等领域对高品质大规格金属复合板具有广泛的市场需求[1-2].双金属复合板由于其层间材料物理性能及力学

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