摘要
针对许多结构完整性评定规范焊接接头难以得到准确的极限载荷问题,文中在理想的双材料模型基础上,通过考虑热影响区的影响,建立非匹配焊接接头"三材料"模型,利用有限元分析软件ABAQUS求解计入热影响区的非匹配焊接接头极限载荷值,再由回归分析法得到了非匹配焊接接头极限载荷的回归方程,并分析验证了回归方程的适用性、准确性.结果表明,非匹配焊接接头在相同匹配条件下,热影响区屈服强度决定了接头的极限载荷,该反映非匹配焊接接头力学性能及几何尺寸不均匀的回归方程适合计算非匹配焊接接头的极限载荷.
A tri-material model was proposed to investigate the effects of HAZ on the limit loads of mismatched welded joint. Some assumptions of materials and geometries of welded joint were given in the finite element limit analysis. The finite element analysis were carried out on the welded joint with a series of configurations of different materials properties,different widths of HAZ and different groove angles. The results show a significant influence of mismatched materials,especially the HAZ of welded joint,on the limit load ratio. The results also illustrate the changing trend of the limit load ratio with the various groove angles and widths of the HAZ of the mismatched welded joint. Numerical simulation results show that the limit load of mismatched welded joint is determined by the yield strength of HAZ. The regression equation in this paper can calculate the limit loads of mismatched welded joint.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2013年第11期17-21,114,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(50835003
10972078)
