Abstract
The paper present results of a numerical modelling of ductile fracture and failure of elements made of 5182H111 aluminum alloy subjected to dynamic traction. The analysis was performed using Johnson-Cook model based ABAQUS software. The infrared thermography was used to quantify deformation localization zones, also to relate the temperature changes of the specimen, continuously recorded by thermography, with the load extension diagram. The aim of the research was to specify and test the mechanical properties during numerical simulation. The experimental test results for the mechanical properties of the studies are presented with a large description of the testing facilities. The test results were used to determine the temperature dependencies of the mechanical properties, yield strength, modulus of elasticity and thermal elongation
Highlights
Ductile fracture is a geometry dependent event, whereas the fracture toughness or ductility of a material can not be directly transferred from one geometry to another
It depends on variation of geometry constraint level, conventional fracture mechanics parameters
Damage parameter is not incorporated into the constitutive equation and it is assumed that presence of voids does not significantly alter the behavior of the material
Summary
Ductile fracture is a geometry dependent event, whereas the fracture toughness or ductility of a material can not be directly transferred from one geometry to another. It depends on variation of geometry constraint level, conventional fracture mechanics parameters. Damage parameter is not incorporated into the constitutive equation and it is assumed that presence of voids does not significantly alter the behavior of the material. The von Mises criterion is most frequently used as yield criterion in uncoupled models, Damage parameter is incorporated into constitutive equation and crack growth simulation is automatically performed using a complete deterioration of elements in front of the crack tip [2].
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