Analytical elastic stiffness model for 3D woven orthogonal interlock composites

Abstract

This research presents the development of an analytical model to predict the elastic stiffness performance of orthogonal interlock bound 3D woven composites as a consequence of altering the weaving parameters and constituent material types. The present approach formulates expressions at the micro level with the aim of calculating more representative volume fractions of a group of elements to the layer. The rationale in representing the volume fractions within the unit cell more accurately was to improve the elastic stiffness predictions compared to existing analytical modelling approaches. The models developed in this work show good agreement between experimental data and improvement on existing predicted values by models published in literature.

Effect of shallow straight-joint braided fabric geometrical parameters on fiber volume fraction

“…Figure 2 shows the microstructure of the 2.5D shallow straight-joint structure and illustrates geometry parameters of the fabric and RUC. In this work, the unit cell is representative of one repeat of the 2.5D shallow straight-joint architecture [18] , and takes into account the actual geometry including the yarn cross-sectional area. It can be seen from Figure 2 that the spatial path of warp yarn is sinusoidal and the spatial path of weft yarn is straight, and the crosssectional shape of weft yarn is lenticular and rhombus, respectively.…”

Internal geometric modelling of 3D woven composites: A comparison between different approaches

“…In most of these models, different geometries have been assumed for the cross-section shapes of the yarns such as rectangular (Tan et al [8]), lenticular (Quinn et al [9]) and ellipsoidal (Brown and Wu [10], Wu [11] and Buchanan et al [12]). However, more recent models [13,14] take into account the undulation of the yarns along the fill and warp directions induced by the binder yarn and how it affects their cross-section.…”

Multi‐scale modeling of three‐dimensional angle interlock woven composite subjected to ballistic impact using FEM

“…The multi-scale models can be characterized as constitutive models in which composite's global constitutive response is defined simultaneously throughout the simulation. Moreover, several analytical solutions 9,[28][29][30][31] for practical issues are restricted to basic geometries and simplified simulations. For the subsequent analysis did not represent the progressive damage growth as predicted by many researchers, 32,33 which promotes the adaptation of several multi-scale models and finite element method.…”