Evaluating the fracture strength of welded joints based on their limit states under high-cycle stresses

Abstract

The research presented here aims at evaluating the strength of the welded joints of spheroidal cast iron of large mineral crushers based on the limit states under very high-cycle loading. Several experiments were performed using semi-natural and standard specimens. This study derived the summary fracture process diagram, including the test results for compact tension specimens and semi-natural specimens, for all fracture process stages. A method for evaluating the strength of these welded joints based on safety factors, when the number of loading cycles exceeds 108, is proposed.