| 摘要: |
| 采用数值模拟方法对不锈钢薄板电弧焊接塑性应变演变过程进行了分析.结果表明,在焊接过程中焊缝及近缝区内无论是纵向塑性应变还是横向塑性应变均为压缩塑性应变,熔池凝固冷却产生的拉伸回复不足以完全抵消加热过程已产生的压缩塑性应变,最终残留在焊缝及近缝区内的塑性应变仍保持压缩状态,压缩塑性区的宽度明显大于材料"力学熔化区"宽度. |
| 关键词: 不锈钢 焊接 塑性应变演变 有限元 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(50935008,50505019和50975268);教育部新世纪优秀人才项目(NCET-07-0503);浙江省科技计划项目(2009C21019) |
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| Fundamental research of welded plastic strain evolution process II:Evolution process of welded plastic strain in thin stainless steel plate |
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WANG Peng1, XIE Pu1, ZHAO Haiyan1, GUAN Qiao2
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1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2.Beijing Aeronautical Manufacturing Technology Research Institute, Bejing 100024, China
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| Abstract: |
| A numerical simulation method was used to analyze the evolution process of arc welded plastic strain in thin stainless steel plates. The calculated results demonstrate that both of longitudinal and transverse plastic strains in the weld and its periphery during welding process were compressive. The tensile unloading generated in the cooling stage could not cancel the pre-existing compressive plastic strain,which made the residual plastic strain in the weld and its periphery remain in compressive state. The width of compressive plastic strain area was obviously wider than that of "mechanics melting zone" in the stainless steel. |
| Key words: stainless steel welding plastic strain evolution finite element |
