Simplified micromechanics model to assess constraint effect on brittle fracture at weld defects
In recent years, experimental and analytical investigations were conducted to predict the occurrence of brittle fracture from weld defects. These investigations took into account the effects of a loss of plastic constraint at the crack tips. These effects are important because many of the weld defects in beam to column connections are small cracks although the material toughness is measured using a specimen with a deep notch. This paper shows the ability of the simplified model to predict brittle fracture under low plastic constraint conditions. Fracture toughness tests of SENB specimens with deep and shallow notches were performed and theWeibull stress approach and TSM were used to consider the effects of a loss of plastic constraint on fracture toughnessfor shallow-notched specimens.
T.Iwashita Y.Kurobane K.Azuma
Ariake National College of Technology, Fukuoka, Japan Kumamoto University, Kumamoto, Japan Sojo University, Kumamoto, Japan
国际会议
第12届钢管结构国际学术会议(The 12th International Symposium on Tubular Structures)
上海
英文
127-134
2008-10-08（万方平台首次上网日期，不代表论文的发表时间）