In this paper we develop a finite deformation micromechanical framework for modeling rate-dependent failure in unidirectional composites under off-axis loading. The model performance is compared with original experiments on thermoplastic carbon/PEEK tested at different strain-rates and angles. To achieve quantitative agreement the experiments, microcrack initiation criterion based local stress ...

A three-dimensional micromechanical finite element model is developed to study the viscoelastic behavior of the silica nanoparticle/polyimide nanocomposites. The representative volume element (RVE) of the model consists of three phases including silica nanoparticle, polyimide matrix and interphase which surrounds the nanoparticle. The interphase region is created due to the interaction between ...

Martensite banding in dual-phase steels is an important research topic the field of materials design, since it affects local damage properties material largely. Therefore, necessary to quantify amount and geometrical details bands a specific microstructure, for example, simulative approaches. A convolutional neural network trained on manually labeled scanning electron microscopy images DP800 st...

Diffusion behaviors of heterogeneous materials are paramount importance in many engineering problems. Numerical models that take into account the internal structure such robust but computationally very expensive. This burden can be partially decreased by using discrete models, however even then practical application is limited to relatively small material volumes. paper formulates a homogenizat...

The development of new type hydrogels featuring enhanced properties is a recent topic and particular interest for wide range industrial applications, especially in biomedical sector. present contribution focuses on the mutliscale modeling that are treated by enzymatic mineralization thus enriched with calcium phosphate. More specifically, phosphate forms spherical or honeycomb structures hydrog...

The FE 2 $$ {}^2 computational homogenization method is a predictive multi-scale without the need for constitutive assumptions and/or potential function postulates at macro engineering scale. Instead, effective micro-structural responses are extracted directly from representative volume element (RVE) underlying each point. However, still computationally too expensive most practical uses, since ...

This study presents a hybrid method based on artificial neural network (ANN) and micro-mechanics for the failure prediction of IM7/8552 unidirectional (UD) composite lamina under triaxial loading. The ANN is trained offline by numerical data from high-fidelity micromechanics-based representative volume element (RVE) model using finite (FEM). RVE adopts identified constituent parameters inverse ...

This paper presents a new multi-scale method for the homogenization analysis of hyperelastic solids undergoing finite strains. The key contribution is to use an incremental nonlinear homogenization technique in tandem with a model reduction method, in order to alleviate the complexity of multiscale procedures, which usually involve a large number of nonlinear nested problems to be solved. The p...

1. Abstract The integrated lightweight design optimization of structural layout and material microstructures are discussed in this paper. By analyzing the basic features of such a two-scale problem, it is found that the optimal solution strongly depends upon the scale of the material unit cell (UC) or named representative volume element (RVE). In fact, the effective material properties predicte...