Microstructure modelling and prediction of effective elastic properties of 3D multiphase and multilayer braided composite

Abstract

This paper is focused on the microstructure modelling and evaluation of effective elastic properties of three-dimensional multiphase and multilayer braided composite. Regarding the multiscale characteristics of the composite, the microstructure modelling is carried out sequentially from fibre to tow scale. The geometrical configuration of the microstructure is first analysed, and mathematical relations among different geometrical parameters are derived on each scale. Second, effective elastic properties are obtained based on the sequential homogenisation from fibre to tow scale. A strain energy based method is proposed to evaluate effective elastic properties with specific boundary conditions imposed on the microstructure. Numerical results obtained by the proposed method and the microstructure model show a good agreement with the results measured experimentally.

Micro-XCT-based finite element method for predicting the elastic modulus of needle carbon-fiber-reinforced ceramic matrix composites

“…The elastic moduli of each element are determined by using Eqs. (1) to (4). The gray levels of the fiber bundle, matrix, and void (g b , g m , and g v ) are equal to 10, 18, and 0, respectively.…”

“…To calculate these elastic parameters, a variety of methods have been developed in recent years. The typical methods include the homogenization method [1,2], the finite element method [3][4][5][6], and the general method of cell [7][8][9], all of which require a representative volume element (RVE) [10] as an input. The most common RVE is the minimum periodic structure after simplifying the real microstructure of composite.…”

An integrated micromechanical model and BP neural network for predicting elastic modulus of 3-D multi-phase and multi-layer braided composite

“…. , nÀ1) can be used to adequately describe the RVC model with n layers of matrices [19]. In this paper, a 3-D braided C/C-SiC composite is considered as a case study.…”

“…In comparison, the studies for 3-D MPML braided composite are limited and inadequate owing to the fact that MPML composite has just been developed in recent decades. The authors have published few works about the RVC microstructure modeling and finite element computation of the effective properties of MPML composite [18,19]. However due to the complex multi-layer microstructure and large heterogeneity of multi-phase materials, a detailed RVC finite element model usually involves hundreds thousands of elements http://dx.doi.org/10.1016/j.compstruct.2014.11.052 0263-8223/Ó 2014 Elsevier Ltd. All rights reserved.…”

Structural optimization in ESAC: annals 2011

“…This work presents a microstructural modeling method considering the oxidation effect. Further studies on the prediction of material properties were carried for the multiphase and multilayer braided composite [5]. Regarding the multi-scale characteristics of the composite, the microstructure modeling is carried out sequentially from fiber to tow scale.…”