Topic
Fracture toughness
About: Fracture toughness is a research topic. Over the lifetime, 39642 publications have been published within this topic receiving 854338 citations.
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TL;DR: In this paper, a new uncoupled anisotropic fracture criterion based on the magnitude of stress vector (MSV) was proposed to simulate the ductile fracture of Al2024-T351 alloy.
152 citations
TL;DR: In this paper, two fracture criteria are proposed and applied to blunt-notched components made of brittle materials loaded under mixed mode; the former is based on the averaged strain energy density over a given control volume, the latter on the cohesive crack zone model.
Abstract: Two fracture criteria are proposed and applied to blunt-notched components made of brittle materials loaded under mixed mode; the former is based on the averaged strain energy density over a given control volume, the latter on the cohesive crack zone model. In both instances use of the equivalent local mode I hypothesis is made. Only two material properties are needed: the ultimate tensile strength and the fracture toughness. Numerical predictions of rupture loads from the two criteria are compared with experimental measurements from more than 160 static tests with notched beams. The samples are made of PMMA and tested at − 60°C to assure a bulk behaviour almost linear elastic up to rupture. Notch root radii range from 0.2 to 4.0 mm and load mixicity varies from pure mode I to a prevailing mode II. The good agreement between theory and experimental results adds further confidence to the proposed fracture criteria.
152 citations
TL;DR: In this paper, the fracture behavior of a Zr{sub 41.25}Ti{sub 13.75}Ni{sub 10}Cu{sub 12.5}Be{sub 22.5] bulk metallic glass observed using a single edge notched fracture sample loaded in tension (SEN(T)).
152 citations
TL;DR: In this paper, a physical model of fracture in materials is developed which features a brittle crack imbedded in a plastically deformed medium, and general criteria for the existence of an atomically sharp crack is that the dislocation content near the crack tip be limited by the inhomogeneous character of dislocation slip.
Abstract: A physical model of fracture in materials is developed which features a brittle crack imbedded in a plastically deformed medium. This model is presented as an alternative to fully ductile failure by hole growth, and general criteria for the two alternatives are discussed. One of these criteria for the existence of an atomically sharp crack is that the dislocation content near the crack tip be limited by the inhomogeneous character of dislocation slip in the crystal. With the dislocation distribution characteristic of Mode III fracture, we derive expressions for the fracture toughness as a function of material parameters. We have extended the theory to the case of hydrogen embrittlement in steels and compare our theoretical predictions with experimental work by others.
152 citations
TL;DR: Comparing the yielding, plastic flow, and fracture behavior of two implantable grades of UHMWPE showed that the hardening and plastic flow behavior clearly discriminated between the GUR 1120 and 4150 HP, and a statistically significant difference between the fracture toughness of the two resins was also evident.
152 citations