The finite element method has been used to simulate the properties of panels with Kagom e and tetragonal cores under compressive and shear loading. The simulation has been performed for two different materials: a Cu-alloy with extensive strain hardening and an Al-alloy with minimal hardening. It is shown that the Kagom e core is more resistant to plastic buckling than the tetragonal core under ...

The thermomechanical problem involving simple shearing of a finite slab made of an isotropic and viscoplastic material is studied with the objective of finding the e&t of the strain hardening parameter, strain-rate hardening parameters, thermal softening coeflicient and thermal conductivity on the initiation and growth of adiabatic shear bands. The body is placed in a hard loading device, i.e. ...

Asymptotic near-tip fields are analyzed for a plane strain Mode I crack propagating dynamically in non-associative elastic–plastic solids of the Drucker–Prager type with an isotropic linear strain hardening response. Eigen solutions are obtained over a range of material parameters and crack speeds, based on the assumption that asymptotic solutions are variable-separable and fully continuous. A ...

A constitutive model for the elastic-plastic behavior of plastically compressible orthotropic materials is proposed based on an ellipsoidal yield surface with evolving ellipticity to accommodate non-uniform hardening or softening associated with stressing in different directions. The model incorporates rate-dependence arising from material rate-dependence and micro-inertial effects. The basic i...

Abstract Block braked railway wheels are subjected to thermal and rolling contact loading. The loading results in high temperatures stresses which cause slow time dependent processes such as creep, relaxation static recovery of the wheel material. At same time, implies a very fast mechanical load application. This paper is focused on material modeling pearlitic steel for wide range rates at ele...

Although the prediction of earing in cup drawing process is considerably related to yield surface shape, evolution also essential for final ear form. The bending-unbending issue a fundamental subject occurring on die and punch shoulders. Since stress loading path dependent reversal loadings, conventional hardening models used monotonic conditions bring about inaccurate outcomes predicting ultim...

Constitutive modeling of material behaviour is becoming increasingly important in prediction of possible failures in highly loaded engineering components, and consequently, optimization of their design. Damage occurrence and accumulation within the material are described in this paper by means of models of kinematic and isotropic hardening according to Chaboche material model. Since the materia...

Contact between a slider and a magnetic recording disk is modeled as transient contact of a sphere on a moving flat. The sphere is assumed to be rigid, and the flat is treated as an elastic-plastic body with isotropic hardening. Heat generation is related to friction at the contact interface. Dimensionless solutions are obtained for maximum temperature rise, maximum contact force, maximum conta...

This paper is a phenomenological study representing the influence of hardening type on instrumented indentation F-h curve. Spherical and inverse analysis techniques (IAT) are used two metallic materials (DP600 AA2017) investigated. Pure isotropic (Voce) combined (Chaboche 1986) laws adopted for describing plastic behavior studied materials. The loading curve first. Kinematic results in softenin...