The main goal of this study is to investigate the drop‐weight impact analysis sisal fiber–reinforced epoxy resin composite materials for automotive applications using Abaqus/CAE software based on ASTM D‐7136 standard. For simulation, a [0/0] s unidirectional sisal/epoxy laminate with an overall thickness 2.16 mm was used, and 0.5, 1, 2, 3 kg rigid hemispherical impactor mass m/s velocities were used deal their effects laminates. result revealed that initial damage mechanism in event...

Rubble-stone masonry structures are found abundantly in the Asian countries along Himalayan range. Such usually constructed dry-stone or mud mortar, which makes them susceptible to damage and collapse earthquakes. In order study seismic behavior of these structures, dynamic shake table tests on three reduced-scale rubble-stone models were conducted. The comprised a representative school building, residential model incorporating simple cost-effective features form horizontal vertical...

Concrete is a quasi-brittle material and generally fails in mixed mode I-II fracture. The fracture energy release I II during crack propagation usually different. However, the tensile test toughness has been considered most of numerical models to study concrete. In this paper, phase field model presented which considers for simulations. addition, it uses controlling parameter χ which, sense, controls governing failure criterion. post-peak response modeled using cohesive zone approach. effect...

Extensive research has explored cracking in asphalt mixtures under pure mode-I conditions; however, heavy traffic loads often lead to crack formation mixed-mode fracture conditions pavements. This paper presents a phase field damage model simulate I-II phenomena observed concrete. In contrast the conventional approach employing cohesive zone models, which restrict propagation exclusively peripheries of interface elements within computational mesh, presented herein can evolution throughout...

Understanding the process of prenucleation clustering at supersaturating stage is significant importance to envisage polymorphism in crystalline materials. Preferential formation a thermodynamically stable crystal form suggests energetically favored patterns interactions which control molecular aggregation during nucleation. Introduction additives crystallization sometimes used as suitable strategy obtain metastable polymorphs cases where it not easy capture same by conventional methods....

SUMMARY The performance of partition‐of‐unity based methods such as the generalized finite element method or extended is studied for simulation cohesive cracking. focus investigation on bilinear quadrilateral elements using these methods. In particular, approximation displacement jump field, representing cracks, by method/generalized and its effect overall behavior at structural level investigated. A single test performed with two different integration schemes, namely Newton‐Cotes/Lobatto...

Unlike the cohesive interface element model, phase field model (PFM) is a newly developed computational which provides unified approach to predicting crack nucleation, propagation, coalescence and branching without any ad-hoc criterion. Over years, several variants of are presented. This paper aims investigate suitability different models determine optimal characteristic functions/model parameters for low-temperature fracture in asphalt mixtures. The analysis results method (which belongs...

This research intends to numerically study the out-of-plane behaviour of confined dry-stacked masonry (CDSM) walls against blast loading. CDSM is a mortarless interlocking system consisting Hydraform blocks laid in stretcher bond with reinforced concrete (RC) confining elements. A nonlinear numerical model developed using advanced finite element hydrocode ANSYS-Autodyn response subjected explosive loads. Four different test cases charge weight 4 kg, 8 12 and 16 kg Wabox are investigated...

A mesoscopic, time-dependent finite element model for the simulation of dynamic fracture in laminated composite plates is presented. The computational allows mesh-objective multiple matrix cracking and delamination plates. analyses are performed with an emphasis on quantification effect loading rate interacting damage mechanisms, i.e. delamination. In particular, effects initiation, propagation, interaction between under low high velocity impact studied. Moreover, paper addresses issues...

A numerical homogenization scheme is presented to model glass particle-toughened polymer materials under dynamic loading. constitutive law developed for the material and validated by comparing results experimental test data. similar as that of with unknown parameters assumed polymer. used determine from boundary value problem (BVP) a representative volume element. Unlike standard computational scheme, proposed can be after localization occurs in material. The multiscale then verified against...

In this work, a phase field approach to modelling fracture in asphalt mixtures is presented. More specifically, cohesive zone-based model used. The crack the material modelled as regularised damage, smeared over region of finite length, using damage variable. variable takes on value 1 for fully damaged surface 0 an intact solid. energy dissipated due inelastic behaviour zone concept and associated traction-separation constitutive law. implemented element framework. Several numerical examples...

Abstract Bridges are among the most vulnerable structures to earthquake damage. Most bridges seismically inadequate due outdated bridge design codes and poor construction methods in developing countries. Although expensive, experimental studies useful evaluating piers. As an alternative, numerical tools used evaluate piers, many techniques can be applied this context. This study employs Abaqus/Explicit, a finite element program, model piers nonlinearly validate proposed computational method...

Rigid Inclusions have been increasingly used as a successful technique for improving soft clay deposits. This was first introduced by Menard in the 1990s and is known commercially Controlled Modulus Columns (CMC’s) [1]. Unlike ordinary piles that transfer entire external loads to stiffer-bearing soil layers, rigid inclusions are mainly reduce total differential settlements reducing transferred layers. One of challenging tasks associated with this type improvement reasonably estimate ground...

A mesoscopic, geometrically and physically nonlinear finite element model based on solid-like shell elements is presented for the simulation of impact damage in laminated composite structures. To matrix cracking, a discontinuous (DSLS) utilized. partition unity approach exploited to incorporate discontinuity mid-surface, director internal stretching field. This enables arbitrary propagating cracks through mesh. The has only displacement degrees freedom, thus avoid need complicated update...

In order to arrive at safe and reliable design of composite structures, understanding the mechanisms mechanics damage growth in these materials is paramount significance. Numerical models, if designed, implemented used carefully, can be helpful not only understand but also predict susceptibility a structure failure. this thesis, advanced finite elements numerical methods are explored develop an integrated, computationally efficient framework for analysis interacting laminated plates/shells...