Design And Analysis Of Sandwich Beam Make By Combination Of Kenaf Core And Bast

Noor Aliah, Nordin (2008) Design And Analysis Of Sandwich Beam Make By Combination Of Kenaf Core And Bast. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The purpose of doing this research is to study the properties of kenaf stem to make kenaf sandwich beam with a suitable thickness based on the simulation of actual kenaf stem. Also study and finds the best parameter for the composite structure. This sandwich beam laminates consist of the bast and core fiber of kenaf stem and the polyester composite thermoset. The kenaf fiber is supplied by Forest Research Intitutes Malaysia (FRIM), Kepong, Kuala Lumpur and separated by using Vibratory Screen Machine in FRIM Bioresource Composite Laboratory. The composite panel is fabricated by cold press techniques. For the mechanical testing, the standard of the testing is referred to ASTM D5083 for tensile testing and ASTM C393-00 for flexural testing. This sandwich beam will be made with laminates of different size of bast and core. The fiber is dried in the oven for half an hour at temperature 80 °C. The preparation for open mould is done by using mild steel to fabricate the specimen. The techniques of compression molding is used to fabricate the kenaf fiber reinforce polyester composite specimens. The composite is compressed at 10 Bar pressure at room temperature and left it cured in 24 hours. The removal composite panel is then left at room temperature for 2 weeks to ensure the composite is well dried before cutting process into desired size based on ASTM standard and deciding size. The same procedure is done for fabricating sandwich beam. From the previous research, the homogenous composite panel from the weight of fiber is 20%. Based on the results of the mechanical testing for single material, the sandwich beam was fabricated from the calculation and analysis before. The optimum and suitable thickness from calculation is done for sandwich beam. The two specimen for sandwich beam was fabricated which are the specimen from the calculation and the other one is from the random thickness. Based on mechanical testing between specimen from calculation and random, it shows that the specimen from calculation can support higher load compared to specimen from random thickness.

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