Up to now a large number of models have been developed to measure or predict the damage in equipments. Some of these models have been implemented in ABAQUS software. To implement damage parameters in the software, it is necessary to perform complex and expensive practical tests. One of these damage models is Forming Limit Diagram (FLD).The purpose of this research is deriving required parameter...

It is controversial whether the plastic Poisson’s ratio and ellipticity are invariable in Deshpande–Fleck model, which describes constitutive behavior of foam materials. In this paper, model modified by a variable plasticity based on nonassociated flow rule. The measured situ digital image correlation (DIC) technology during uniaxial compression experiment aluminum foam. then determined through...

In latest years small scale machining has been widely used in advanced engineering applications such as medical and optical devices, micro- nano-electro-mechanical systems. micromachining of metals, a depth cut becomes usually smaller than an average crystal size polycrystalline structure; thus, the cutting process zone can be localized fully indoors single grain. Due to crystallographic anisot...

Pressurized hybrid composite pipe structures, produced by filament wound subjected to impact loads, were numerically investigated. A combined 3D-FE Model based on the use of interlaminar and intralaminar damage models is established. Intralaminar damages such as matrix cracking fibre failures are predicted using 3D Hashin criteria, whereas (delamination) was evaluated cohesive zone elements. Th...

A micro-meso-macro analysis framework based on the multi-scale method was employed to analyse mechanical behaviour of marine GFRP stiffened panels. The study aims establish a procedure for assessing impact material composition and weave ultimate strength assessment an essential step in design process, investigation construction materials has great benefit lightweight composite structures. micro...

A size effect is exhibited by metals in cutting processes at small scales: a nonlinear escalation the energy per unit volume with decrease thickness of uncut chip. To understand this phenomenon, numerical model orthogonal micro-cutting f.c.c. single-crystal copper was developed, and three different depths cut (0.8 μm, 1.4 μm 2.0 μm) were considered. Enhanced models crystal plasticity (EMCP) str...

Carbon fiber reinforced thermoplastic polymer (CFRTP) laminates can be used in packaging electronics components to reduce weight and shield external disturbance. The CFRTP structures operation are inevitably suffer dynamic loading conditions such as falling rocks, tools impacts. In this study, a strain rate dependent material model for accurately evaluating the response of with different stacki...

In the present work, large deformation rate-dependent constitutive behavior of isotactic polypropylene is studied via an experimentally validated macroscale model. To analyze nonlinear response material, mechanical tests are conducted at room temperature and a phenomenological model proposed to describe viscoplastic yielding damage semicrystalline polymer. The based on finite elastic-viscoplast...

The paper presents a simple but efficient new numerical scheme for the integration of nonlinear constitutive equations. Although it can be used for integration of system of algebraic and differential equations in general, the scheme is primarily developed for use with direct solution methods for solving boundary value problems, e.g. explicit dynamic analysis in ABAQUS/Explicit. In the developed...

In the present work, a set of physically-based failure criteria are applied to cross-ply Non-Crimp Fabric (NCF) composite. The proposed account for stitch reinforcement and induced in- out-of-plane fibre misalignment. A distinction between matrix failures in tension compression is introduced, while in-plane shear non-linear response directly incorporated model as well. constitutive associated w...