Abstract

For the past decades, usage of natural fiber reinforced composites in low bearing load applications are increasing tremendously due to drawbacks concerning the use of synthetic fibers. Kenaf fibers have a good potential to be used as composite reinforcements as they possesses excellent fiber strength compared to own self-weight. Current work concentrates on mechanical properties of woven fabric kenaf composites with single-lap hybrid joints configurations. Four width to diameter ratio, (W/d) of cross-ply lay-up joints as designed in testing series were tested by using quasi static mechanical testing. Experimental results showed that the failure load increased with the increasing of W/d ratios. Thinner lay-up had better bearing strength compared to thicker lay-up as found in current study.

Highlights

  • Awareness in shortage of non-renewable resources is increasing greatly worldwide and concerns of implementing renewable resources are being developed by many sectors

  • Kenaf fiber is an important source of natural fiber as reinforcing substrate in composite materials which demonstrates good specific strength

  • This study was carried out to investigate the effect of W/d (W/d = 2, 3, 4, 5) and different plate thickness (PX2 and PX4) on bearing stress at failure of woven fabric kenaf fiber composite plates under quasi-static loading

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Summary

Introduction

Awareness in shortage of non-renewable resources is increasing greatly worldwide and concerns of implementing renewable resources are being developed by many sectors. The types and shapes of washers had direct influence upon the performance of hybrid joints, whereby the applied stress are transferred through friction due to the bolt tightening. They found that adequate clamping force on the mechanical fastening with appropriate washer type can enhance the mechanical properties of the hybrid joint. Single-lap woven fabric CFRP bolted joints had been studied regarding the effects of joint geometry They found that the bearing strength increases with the W/d ratios [7]. This study is designed to investigate the effect of different W/d ratios and laminate lay-up for single-lap hybrid bonded-bolted joint on woven fabric kenaf fiber composite plates. The current testing series were designed and experimental mechanical properties were determined by using quasi-static mechanical machines following ASTM Standard D3039B [8]

Materials
Specimen preparation
Tensile tests
Results and Discussion
Conclusions
Full Text
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