Abstract Uncoupled ductile fracture models have gained popularity for accurate prediction of in metallic sheets due to their ease implementation. Accurate description anisotropic behavior is an active research field sheet metal forming. In the present study, two isotropic models, i.e., modified Mohr-Coulomb and Hosford-Coulomb are evaluated O-tempered aluminum alloy (AA1050-O) sheet. The plasti...

In the current paper the results of a numerical simulation that were verified by a well instrumented experimental procedure for studying the arching effect over a trapdoor in sand is presented. To simulate this phenomenon with continuum mechanics, the experimental procedure is modeled in ABAQUS code using stress dependent hardening in elastic state and plastic strain dependent frictional harden...

Abstract In the present work, numerical models are developed for shearing and cutting process of advanced high strength steel-blanks which can predict edge morphology in shear effected zone. A damage model, based on modified Mohr-Coulomb fracture surface, is calibrated. To increase predictability models, surface fine-tuned areas corresponding to stress-state cutting, a methodology called Local ...

The paper is devoted to the numerical solution of an elastoplastic constitutive initial value problem containing the Mohr-Coulomb yield criterion, a nonassociative plastic flow rule, and a nonlinear isotropic hardening. The constitutive problem is discretized by the implicit Euler method. Instead of the conventional Koiter formulations, we define the plastic flow rule using the subdifferential ...

The Savage-Hutter (SH) avalanche model is a depth-averaged dynamical model of a fluid-like continuum implementing the following simplifying assumptions: (i) density preserving, (ii) shallowness of the avalanche piles and small topographic curvatures, (iii) Coulomb-type sliding with bed friction angle delta and (iv) Mohr-Coulomb behaviour in the interior with internal angle of friction phi> or =...

This paper includes the most important findings of a series of linear analyses focusing on the development of failure that is identified through different failure criteria. The historic monument which was selected for this investigation is the church of Agia Triada, in the District of Karditsa, Greece. The numerical simulation for the church of Agia Triada includes all parts of the super-struct...

BACKGROUND Finite element simulation has been used in last years for analysing the biomechanical performance of post-core restorations in endodontics, but results of these simulations have been interpreted in most of the works using von Mises stress criterion. However, the validity of this failure criterion for brittle materials, which are present in these restorations, is questionable. The obj...

A numerical analysis of the limit state for solids, with an adequately described structural geometry, is often a computationally demanding task, and there need effective method. The existing solid elements Finite Element Limit Analysis (FELA) are either expensive or require stress cutoff yield surface triaxial states. This paper presents partially mixed lower bound tetrahedral constant element ...