PLASTICS - DETERMINATION OF TENSION - TENSION FATIGUE CRACK PROPAGATION -LINEAR ELASTIC FRACTURE MECHANICS(LEFM) APPROACH (ISO 15850:2002, IDT)
This standard specifies a method for measuring the propagation of a crack in a notched specimen subjected to a cyclic tensile load varying between a constant positive minimum and a constant positive maximum value. The test results include the crack length as a function of the number of load cycles and the crack length increase rate as a function of the stress intensity factor and energy release rate at the crack tip. The possible occurrence of discontinuities in crack propagation is detected and reported.
