試験及び解析による構造物の局部破損の支配因子に関する研究
概要
Experimental and analytical study was carried out with notched specimens which simulated multiaxial stress state in structural discontinuity, in order to reveal the mechanism and dominant parameters of “local failure”. Both the tensile test and finite element analyses (FEA) exhibited, notch strengthening. Furthermore, in the tensile test, failures of notched specimens were progressed from inside, where hydrostatic stress showed the maximum value in the FEM, whereas Mises stress did not show the maximum value. Based on above results of the tensile test and the FEA, author investigated the relationship between the degree of notch strengthening and the maximum value of hydrostatic stress, which turned out to be proportional. Therefore, it was revealed that both Mises stress and hydrostatic stress are dominant parameters of local failure.
