压力容器2017，Vol.34Issue(3)：17-23,43,8.DOI:10.3969/j.issn.1001-4837.2017.03.003
几何和材料拘束与高匹配焊接接头断裂韧性的统一关联
Unified Correlation of Geometry and Material Constraints with Fracture Toughness of Welded Joint with High Mismatch
摘要
Abstract
The capability of the constraint parameter Ap for characterizing in-plane,out-of-plane and material constraints in welded joints with high mismatch and narrow gap has been investigated by numerical calculations,and the unified correlation of the Ap with fracture toughness of the welded joints was also studied.The results show that the geometry and material constraints have significant effects on the J-R curve and fracture toughness JC of the welded joints with high mismatch and narrow gap.The parameter Ap can uniformly characterize in-plane and out-of-plane constraints and material constraint caused by strength mismatches for the cracks with different positions in the welded joints.Based on the constraint parameter Ap,the unified correlation of constraints with fracture toughness of the welded joint can be established.The correlation formulas of the normalized fracture toughness JC/Jref with Ap have been obtained by calculations.关键词
几何拘束/材料拘束/焊接接头/断裂韧性/裂纹Key words
geometry constraint/material constraint/weld joint/fracture toughness/crack分类
机械制造引用本文复制引用
查媛媛,王国珍,轩福贞,涂善东..几何和材料拘束与高匹配焊接接头断裂韧性的统一关联[J].压力容器,2017,34(3):17-23,43,8.基金项目
国家自然科学基金项目(51575184,51375165) （51575184,51375165）
