摘要
焊接应力变形具有高度非线性大梯度特征,其数值计算涉及到材料、几何与组织的非线性问题.基于热弹塑性有限元的焊接应力变形计算能全面反映焊接的温度场、应力变形场及其变化规律,对深入理解焊接过程起着越来越重要的作用.然而焊接热弹塑性有限元的复杂计算过程和高耗时性使得如何进行高效的焊接计算成为备受关注的学科前沿,正在逐步形成具有严格科学性的焊接应力变形高效计算技术.研究了这一领域的研究成果与进展,对焊接应力变形高效计算技术进行了分类,并探讨了其发展趋势.
The stress and deformation of welding have strong nonlinear and gradient characteristics,which calculation involves the nonlinear properties of materials,geometry and microstructures in the welded joint.It is extraordinarily important for understanding the mechanism of welding stress and deformation to investigate the welding thermal process and stress-strain development based on thermal elastic-plastic finite element method(FEM).However,the complicated process and high time-consuming for calculating the welding stress and deformation by the thermal elastic-plastic FEM need to be taken much attentions to research high efficient calculation technologies,and some calculation technologies have become the high efficient calculation technologies with strict academic and practical significance.The paper discusses and summarizes the state of the art,the classifications and development trend of the high efficiency calculation technologies.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第6期107-112,共6页
Transactions of The China Welding Institution
基金
国家自然科学基金项目(50475200)
国家教育部博士点基金(20070698088)
关键词
焊接应力变形
焊接数值模拟
高效计算技术
welding stress-strain
welding digital simulation
high efficient calculation
