Response of short jute fibre preform based epoxy composites subjected to low-velocity impact loadings

• DOI: 10.1016/j.jcomc.2024.100488
• Publication Date: 2024-07-01T17:57:50Z
• Authors: Ariful Islam; Bashir Ahamed; Abu Saifullah; Anamul Hoque Bhuiyan; Emdadul Haq; Abu Sayeed; Hom N. Dhakal; Forkan Sarker
• Keywords: Brittleness; Hemicellulose; Impact energy

This work aimed to investigate the low velocity impact behaviour of short jute fibre non-woven preform epoxy matrix composites experimentally. Dry preforms were developed using an optimised process and a laboratory made preforming device. The effects alkali poly vinyl alcohol (PVA binder) treatments on performances investigated compared at 3 J 6 energy levels. To identify failure modes tested composites, X-ray µCT tomography was employed. results demonstrated that untreated reinforced absorbed higher energy, when they treated (alkali or PVA composites. For maximum forces energies, found as ⁓2478 N ⁓2319 N, respectively; for treatment these values measured ⁓2457 ⁓2216 while, same levels, showed lowest ⁓1683 ⁓1440 respectively. Untreated contains natural matrices such hemicellulose, lignin waxes, which ensured positive response absorb more upon loading. In contrast, facilitates highly packed composite structure, accelerated crack propagation in resulting lower resistance energy. Although, reduced properties due polymer brittleness surface during incidents, this better responses over treatment. application binder alkali-treated fibres provided extra support fibre/matrix interface hence, combined slightly (⁓2027 ⁓1874 respectively) only SEM fracture images damage analysis revealed different modes, supported observed results. obtained from investigation could be helpful various load demanding applications where incidents are likely happened.