SEDL / STP / STP700-EB / STP36990S

Ductile Fracture Behavior of Wrought Steels

Cox, EP
Senior research engineer, Caterpillar Tractor Co., Peoria, Ill.

Lawrence, FV
Professor of Civil and Metallurgical Engineering, University of Illinois, Urbana, Ill.

Pages: 23    Published: Jan 1980

Download this paper for $25 PDF (332K)          View License Agreement
Abstract

A two failure criteria model based on plasticity limit load (LL) theory and linear elastic fracture mechanics (LEFM) is proposed for characterizing the fracture behavior of ductile structural metals. Failure is considered to occur at the lower load predicted by the two failure criteria. The variables involved in the two failure criteria model are: fracture toughness (K^c), tensile strength (Su), relative crack length (a/W), and geometry. A dimensionless parameter, K^c/SuW^1/2 was defined. The fracture toughness failure criterion was found to dominate at low values of K^c/SuW^1/2, and the LL failure criterion controls fracture at large values.