摘要
本文从引入虚元的热弹性板元有限元计算和试验测定两方面分析研究了平板堆焊时平面外变形的形态及产生机制.从量级和趋势上看,计算和试验结果吻合良好.结果表明:一端固定的焊缝平面外变形是由横向收缩引起的角变形和纵向收缩引起的纵向弯曲共同作用的结果.纵向拘束的焊缝平面外变形主要是横向收缩引起的角变形,两端固定的焊缝,由于横向收缩和纵向收缩一定程度上都受到拘束,因而降低了整个板的挠度值.
In present paper, the form and mechanism of formation of out-of-plane distortion during bead-on-plate welding was studied by thermal clastic analysis with introduction of dummy element and experiment. Calculation result is fairly well agreed with experiment both in tendency and quantity order. Analysis shows that the out-of-plane distortion of weld fixed at one end is produced by angular distortion caused by transverse shrinkage and longitudinal bending caused by longitudinal contraction jointly, and that of longitudinal restrained weld is mainly produced by angular distortion caused by transverse shrinkage. For the weld fixed at both end, the deflection value of the whole plate is cut down. It is because that both transverse shrinkage and longitudinal contraction arc restrained to a certain extent.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1993年第2期91-97,共7页
Transactions of The China Welding Institution
关键词
虚元
板
堆焊
平面外变形
有限元
dummy clement
bead-on-plate welding
out-of-plane distortion
finite element analysis
