A REVIEW OF THE INFLUENCE OF CONSTRAINT ON FRACTURE TOUGHNESS PREGLED UTICAJA GRANIČNIH USLOVA NA ILAVOST LOMA

Only constraint and stress gradient approaches to transferability of fracture toughness are examined. Different constraint parameters are defined and discussed, and one example is given in each case. Factors that influence the constraint are studied. Special attention is given to the actual trends to use the plastic constraint in the Material Failure Master Curve (MFMC) and the Material Transition Temperature Master Curve (MTTMC). The paper also deals with the influence of T stress on the crack path and out-of-plane constraint and on the influence of thickness on fracture toughness. Uses of plasticity with gradient and the relative stress gradient in local fracture approaches are also examined. Kljucne reci