Study of the relationship between fracture toughness (JIC) and bulge ductility

A theoretical model relating fracture toughness expressed as JIC and bulge ductility {ie71-1} for a material exhibiting linear elastic behavior at low temperature and elastic-plastic behavior at higher temperatures is proposed. This model shows a variation of JIC with {ie71-2} for linear elastic behavior and JIC with {ie71-3} for elastic-plastic behavior. The model contains three constants to be determined experimentally for a given material, …