Load history dependency of plastic collapse behavior of cracked piping

Abstract

The effects of the loading history and the notch interval on the plastic collapse behavior and the plastic collapse strength were investigated for SUS304 steel pipe with two notches perpendicular to the pipe axis direction. The notched SUS304 steel pipe was coated with photo-elastic material. The different combined axial tensile and bending loads were applied to the specimens. The photo-elastic fringes were observed during the loading test. The evolution of the plastic region in the ligament differed depending on the loading history and the notch interval. On the other hand, the plastic collapse strength depended on the loading history and did not depend on the notch interval. © The Society for Experimental Mechanics, Inc. 2013.