论文部分内容阅读
The size effect of tension round bars with circumferential crack was described and used tomeasure the plane-strain fracture toughness K_(1c) of median or low strength steel.The size ofcylindrical specimen required for K_(1c) measurement is much smaller than that of standardspecimen.The J-integral values of the cylindrical sqecimens were calculated to characterizethe size effect.The finite element calculution and fracture morphology analysis have beenconducted to eyplain the fact that smaller cylindrical specimen could be used to measureK_(1c) of median or low strength steel.
The size effect of tension round bars with circumferential crack was described and used to measure the plane-strain fracture toughness K_ (1c) of median or low strength steel. The size ofcylindrical specimen required for K_ (1c) measurement is much smaller than that of standardspecimen The J-integral values of the cylindrical sqecimens were calculated to characterizethe size effect. The finite element calculution and fracture morphology analysis have beenconducted to eyplain the fact that smaller cylindrical specimen could be used to measureK_ (1c) of median or low strength steel.