Life surface inference for endurance characterization of PETspecimens in multi-stress conditions

摘要

In this paper, the results of electrical and multi-stress lifetests performed on flat specimens of polyethylene-terephthalate areexamined taking into account the geometrical approach to combined-stresslife. This allows, besides the electrical and thermal life graphs, theisochronal lines in E vs T coordinates to be plotted. In this way, thewhole life surface of the tested material can be displayed, thusobtaining a complete description of its multi-stress behaviour