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Showing 1 to 5 of 5 for “"user-defined subroutine"”.
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Elastic-Damaging Plasticity Model for Ductile Fracture
… proposed model is implemented in ABAQUS using a user-defined subroutine, i.e. UMAT. Applications to four-point plane strain bending specimens with a key hole notch and to double-tee circular hollow section tubular joints are presented. The proposed model appears to be capable of simulating, with …
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Progressive damage and failure of unidirectional fiber reinforced laminates under impact loading with composite properties derived from a micro-mechanics approach
… by implementing the material damage model as a user defined subroutine in the FE software ABAQUS. From strains supplied by ABAQUS the subroutine uses the free shear traction technique and values of material parameters of the constituents to find average stresses in a FE, and checks for Hashin's …
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Optimal Blast-Resistant Sandwich Structures with Transversely Isotropic, Elasto-plastic Polymeric Foams as Cores
… The material model is implemented as a VUMAT (user defined) subroutine in the commercial finite element software ABAQUS Explicit. We show that the model works robustly in uniaxial deformations as well as in sandwich problems using the test data available in the literature. We provide values of …
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Quasi-Static and Creep Behavior of Enhanced SIC/SIC Ceramic Matrix Composites
… behavior. The model, which was input via a user defined subroutine into the ANSYS finite element program uses the concept of state or internal variables to define the unloading portion of the stress-strain curve. The results were compared with the test data and they show very good agreement. …
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Finite Deformations of Fiber-Reinforced Rubberlike Solids, and of Adhesively Bonded T-peel Joints
Fiber-reinforced rubberlike materials (FRRM) commonly used in tires undergo large deformations, and exhibit different response in tension and compression along the fiber direction. Assuming that the response of a fiber-reinforced rubberlike material can be modeled as transversely isotropic with the …