منابع مشابه
Yield Criteria for Ductile Materials and Fracture Mechanics of Brittle Materials
Brittle materials are materials that display Hookean behavior (linear relationship between stress and strain) and which fail at a discrete strain. Plastic materials display a variety of yielding behaviors associated with changes in the internal structure of the material at a fixed level of strain and at a fixed rate of strain. The time dependence to yielding behavior is due to the structural ch...
متن کاملModelling metal cutting using modern ductile fracture mechanics: quantitative explanations for some longstanding problems
The assumption that negligible work is involved in the formation of new surfaces in the machining of ductile metals, is re-examined in the light of both current Finite Element Method (FEM) simulations of cutting and modern ductile fracture mechanics. The work associated with separation criteria in FEM models is shown to be in the kJ=m2 range rather than the few J=m2 of the surface energy (surfa...
متن کاملNumerical modelling of ductile fracture in blanking
• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version ...
متن کاملMeshfree simulations of thermo-mechanical ductile fracture
In this work, a meshfree method is used to simulate thermo-mechanical ductile fracture under finite deformation. A Galerkin meshfree formulation incorporating the Johnson-Cook damage model is implemented in numerical computations. We are interested in the simulation of thermomechanical effects on ductile fracture under large scale yielding. A rate form adiabatic split is proposed in the constit...
متن کاملContinuum models of ductile fracture : A review
The past 20 years have seen substantial work on the modeling of ductile damage and fracture. Several factors explain this interest. (i) There is a growing demand to provide tools which allow to increase the efficiency of structures (reduce weight, increase service temperature or load, etc.) while keeping or increasing safety. This goal is indeed first achieved by using better materials but also...
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ژورنال
عنوان ژورنال: Journal of Engineering Materials and Technology
سال: 1983
ISSN: 0094-4289,1528-8889
DOI: 10.1115/1.3225613