摘要
以T形焊接接头为算例,结合热弹塑性有限元法和映射应变分量法,研究了角焊缝角变形的产生机制。结果发现:角焊缝产生角变形的主要根源是固有剪切应变,而不是传统思维认为的横向固有正应变,且角变形的大小与固有剪切应变的分布形式密切相关。基于一系列T形焊接接头的数值试验,提出了角焊缝固有剪切应变分量的双抛物面分布模型。
Taking a welded T-joint as computing example, the forming mechanism of fillet weld＇s angle distortion was studied by combining thermal elastic plastic analysis with mapping strain component method. It is found that the main source of fillet weld＇s angle distortion is the inherent shear strain component εxy^I, but not the transverse inherent normal component. Besides, the magnitude of the angular distortion is closely related with the distribution form of εxy^I. This paper put forward double paraboloid distribution model of εxy^I basing on a series of numerical experiments on T-joints.
出处
《华中科技大学学报（城市科学版）》
CAS
2007年第4期88-91,共4页
Journal of Huazhong University of Science and Technology
关键词
角焊缝
角变形
固有剪切应变
分布模型
fillet weld
angle distortion
inherent shear strain
distribution model
