| 焊接数值模拟材料新模型的建立及应用 |
| |
| 引用本文： | 张增磊,史清宇,刘园,鄢东洋.焊接数值模拟材料新模型的建立及应用[J].焊接学报,2009,30(2):45-48. |
| |
| 作者姓名： | 张增磊 史清宇 刘园 鄢东洋 |
| |
| 作者单位： | 清华大学,机械工程系,北京,100084 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 在焊接数值模拟中建立了材料性能依赖于温度及温度过程并考虑加工硬化效应的材料新模型,从而可以更加真实地研究焊接过程中应力应变的变化,并更准确地预测焊后残余应力和应变的分布.热力模拟试验结果表明,从热循环峰值温度至室温的冷却过程中,铝合金5A06材料性能变化遵循一系列不同于加热过程的曲线.考虑加工硬化效应后,焊接热循环过程中不同的屈服应力变化过程,导致了不同的纵向残余应力演变历程.考虑焊接热循环历史对材料性能影响,经历了较高温度焊接热循环以后,焊缝区金属的性能有所降低,焊缝区金属的纵向压缩塑性应变在冷却过程中的恢复程度大于常规模型,最终导致焊缝附近残余拉应力水平低于常规模型.
|
| 关 键 词： | 焊接 数值模拟 材料模型 温度过程 加工硬化 |
| 收稿时间： | 2008/9/15 0:00:00 |
Establishment and application of material models for numerical simulation of welding process |
| |
| ZHANG Zenglei,SHI Qingyu,LIU Yuan and YAN Dongyang.Establishment and application of material models for numerical simulation of welding process[J].Transactions of The China Welding Institution,2009,30(2):45-48. |
| |
| Authors: | ZHANG Zenglei SHI Qingyu LIU Yuan and YAN Dongyang |
| |
| Affiliation: | 1.Department of Mechanical Engineering;Tsinghua University;Beijing 100084;China |
| |
| Abstract: | Temperature and temperature history dependent material model and temperature history dependent work hardening model were established based on the thermal-mechanical experimental results.The results of thermal-mechanical experiments indicated that material properties of aluminum alloy 5A06 during the cooling stage of typical thermal cycles followed one set of curves,which were different from those during the heating stage.The established models were applied in numerical simulation to study the evolution of s... |
| |
| Keywords: | weld numerical simulation material model temperature history work hardening |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《焊接学报》浏览原始摘要信息 |
|
点击此处可从《焊接学报》下载全文 |
|
