摘要
Effect of specimen geometry on fracture toughness is investigated based on the local approach for the welded joints of pipeline steel.The Weibull stress σ w emerges as a probabilistic fracture parameter to define the condition leading material failure.Unstable crack propagation occurs at a critical value of σ w .The fracture behavior for the double edge notched tension specimen is transferred effectively from the fracture toughness test of the standard 3 point bend specimen using the local approach.It has been shown that the Weibull stress σ w is suitable to describe the fracture behavior of material.
Effect of specimen geometry on fracture toughness is investigated based on the local approach for the welded joints of pipeline steel.The Weibull stress σ w emerges as a probabilistic fracture parameter to define the condition leading material failure.Unstable crack propagation occurs at a critical value of σ w .The fracture behavior for the double edge notched tension specimen is transferred effectively from the fracture toughness test of the standard 3 point bend specimen using the local approach.It has been shown that the Weibull stress σ w is suitable to describe the fracture behavior of material.
出处
《压力容器》
1999年第5期10-13,共4页
Pressure Vessel Technology
