Geometric modelling of kink banding in laminated structures

TL;DR

This paper introduces an analytical geometric and energy-based model to understand kink banding in laminated composite structures, adapting geological layer folding models to predict deformation behavior.

Contribution

It presents a novel analytical model specifically designed for kink banding in laminated composites, extending previous geological models to engineered materials.

Findings

Model captures key features of kink banding behavior

Quantitative predictions align well with experimental data

Provides insights into deformation mechanisms in laminated structures

Abstract

An analytical model founded on geometric and potential energy principles for kink band deformation in laminated composite struts is presented. It is adapted from an earlier successful study for confined layered structures which was formulated to model kink band formation in the folding of geological layers. The principal aim is to explore the underlying mechanisms governing the kinking response of flat, laminated components comprising unidirectional composite laminae. A pilot parametric study suggests that the key features of the mechanical response are captured well and that quantitative comparisons with experiments presented in the literature are highly encouraging.