Impact Strength of Different Weaving Patterns of Woven Kenaf Reinforced Polyester Composites

Colloquium of Advanced Mechanics 2016

Khalid, S.N.A.^1 ; Ismail, A.E.^1 ; Zainulabidin, M.H.^1

Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat

86400, Malaysia^1

关键词: Absorption performance;    Force-displacement diagrams;    Impact damages;    Polyester composites;    Potential effects;    Stacking process;    Weaving patterns;    Woven composite;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/165/1/012011/pdf
DOI  :  10.1088/1757-899X/165/1/012011

来源: IOP

【 摘 要 】

This paper focuses on the effect of weaving patterns and orientations on the energy absorption of woven kenaf reinforced polyester composites. Kenaf fiber in the form of yarn is weaved to produce different weaving patterns such as plain, twill and basket. Three woven mats are stacked together and mixed with polyester resin before it is compressed to squeeze out any excessive resin. There is 9 different orientations are used during stacking processes. The hardened composites are cured for 24 hours before it is shaped according to specific dimensions for imp act tests. The composites are perforated with 1m/s blunted projectile. According to the experimental findings, both weaving patterns and orientations have distinct potential effects on the force-displacement diagrams. However, fiber orientations have insignificant effect for plain woven especially in the first stage of deformations. Energy absorption performances for each composite condition are calculated and then plotted against fiber orientations for different weaving patterns. It is found there is no strong relationship between energy absorption and fiber orientations. However for each case of composites, higher energy absorption is found for the composites orientated using [+40°/-15°/+40°/+75°]. Based on the fracture observation, both plain and basket-type woven composites reveal large fragmentations occurred indicating lower energy absorption performances. While for twill condition, no obvious fragmentation is observed where the impact damage around the perforated hole is uniformly distributed leading to higher capability of energy absorptions.