Modelling Analysis on Mechanical Damage of Kenaf Reinforced Composite Plates under Oblique Impact Loadings

Abstract

Abstract. This research focuses on the study of oblique impact on kenaf reinforced composite plate. This study summarizes modeling analysis of targets subjected to certain angle of collisions which ranging from 0"-45". Due to the low density, natural fiber such as kenaf fiber provides relatively good mechanical properties than glass fiber. Thus, natwal fibers have high potential for better reinforcement in light weight structures such as aircraft, automobile. In this research, the velocity impact analysis is conducted by using the commercial finite element analysis software, ANSYS. A few finite element models of the nonwoven composite panel and a rigid impactor is developed using ANSYS software. Experimental investigations in determining mechanical properties and validating purposes are conducted in earlier study by using Universal Testing Machine and High Speed Impact Puncher. Total force, total energy, deformation, and energy absorption of kenaf reinforced composite for oblique impact are analyzed and discussed. The rise of oblique angle will increase the energy absorption of the composite. IntroductionOver the past few decades, there has been a growing interest in the use of natural fibers in composite applications. These types of composites present many advantages compared to synthetic fibers, such as low tool wear, low density, cheaper cost, availability, and biodegradability [I-21. The response of composite materials to ballistic impact has been investigated by many researchers [3-61. It is obvious from the open literature that research on ballistic impact has been focused on the high performance fibres, metals and ceramics. In replacing metals and ceramics, syntactic fiber such as aramid fiber was used to produce more lightweight composites. But, it's consumes to increasing cost of composite to be produced. Therefore, many researches had been done on natural fiber based composite [4-71. Producing composite samples and performing the experimental will consume much time and cost. By using finite element analysis software, the natural composite model can be numerically created in short time and many tests can be virtually performed. But, it is important to do a validation process by comparing the experimental and numerical results obtained before any hither work conducted. Natural impacts in which the projectile strikes the target vertically (90" towards plane) are virtually nonexistent. Its normally occurs in oblique impact by which the impacting occurs in a certain angle of collision.

Influence of Stacking Sequences on Tensile Behaviour of Areca-Kenaf Hybrid Epoxy Composite

“…In recent decades, the awareness towards sustainable product design made the composite industries to replace the synthetic fiber with natural fiber based material for automotive structural and semi-structural applications [1] Natural fibers are of low cost, have good mechanical properties and require less power for production [2].Among the available natural fibers Kenaf is one of the important plant that is cultivated around the world next to cotton. Kenaf fiber has comparatively good mechanical properties than glass fiber due to their low density [3].Few car parts like bumper beams, dashboards are replaced with Kenaf fiber [4]. It is used along with synthetic polymers in wall-boards, ceilings, furniture and interior lining, in automobiles [5].Similarly, areca fiber which is light weight, eco-friendly in nature also has good thermal and acoustic properties.…”

Oblique Perforated Impact Strength of Woven Kenaf Fiber Reinforced Composites

“…More specifically, such composites are also used to withstand under perforated impact loading [1,4,5]. However, lack of works found on investigating the perforated impact especially when loaded obliquely [4].…”

“…Tremendous amount of works can be found in open literature [1][2][3][4][5][6] discussing on the applications of natural fibers reinforced composites in engineering structures. More specifically, such composites are also used to withstand under perforated impact loading [1,4,5].…”

Perforated Impact Strength of Woven Kenaf Fiber Reinforced Composites

“…This is due to a growing environmental awareness across the world to use environmentally friendly and sustainable materials [1][2][3][4]. The potential use of natural fibers also due to their low density and low cost in comparison with conventional fibers.…”