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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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中子衍射和有限元法研究不锈钢复合板补焊残余应力
DOI: 10.3724/SP.J.1037.2012.00341, PP. 1525-1529
Keywords: 不锈钢复合板,补焊,残余应力,中子衍射,有限元
Abstract:
利用中子衍射和有限元法分析不锈钢复合板补焊残余应力,结果表明计算结果与测试结果具有一致性.焊缝和热影响区产生了较高的残余应力,远离热影响区,残余应力逐渐降低.由于局部补焊加热,沿厚度方向产生了弯曲应力;在不锈钢覆层,最大残余应力位于热影响区,由于加工硬化的影响,其值已超过屈服强度.因此,采用常规标准假设会使评定结果与实际存在差异,利用中子衍射与有限元法相结合,不仅可以准确获得残余应力大小,而且可以获得沿厚度方向分布的残余应力,满足安全评定标准有关处理焊接残余应力的要求.
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