Effect of strain rate on compression loading of 3D woven composites in three directions

Abstract

PurposeThis study sets out to compare the response of three‐dimensional (3D) woven composites subjected to high strain rate (HSR) compression loading with the dynamic response.Design/methodology/approachThe 3D composites were manufactured using Kevlar woven fabrics with epoxy resin system utilising vacuum bag moulding approach. Samples were subjected to HSR compression loading in three directions using a modified split Hopkinson's pressure bar.FindingsPeak stress and stiffness of 3D composites were higher for dynamic loading when compared with static loading in case of both in‐plane direction and out‐of‐plane direction. The peak stress and modulus increased with the increase in strain rate for both in‐plane direction and out‐of‐plane direction. Peak stress and dynamic modulus were higher when the samples were loaded in the fill direction compared with the warp direction loading. The failure strain in through‐the‐thickness direction was far higher than in in‐plane warp and fill direction.Research limitations/implicationsOther strength parameters of 3D composites could be studied.Practical implicationsThe study provided the strength comparison of 3D composites in different situations.Originality/valueThe paper provide data on 3D composites for engineering applications.