A Comparison Study Of Standard Test Method For The Determination Of Flexural Property Of Glass Fiber Polyester Laminates

Mohd Faiezul, Johari (2009) A Comparison Study Of Standard Test Method For The Determination Of Flexural Property Of Glass Fiber Polyester Laminates. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Glass reinforced plastic is a composite material made of a plastic reinforced by fine glass fibers. Like graphite reinforced plastic, the composite material is commonly referred to by the name of its reinforcing fibers. Whereas the plastic resins are strong in compressive loading and relatively weak in tensile strength, the glass fibers are very strong in tension but have no strength against compression. By combining the two materials, glass reinforced plastic becomes a material that resists both compressive and tensile forces well. The two materials may be used uniformly or the glass may be specifically placed in those portions of the structure that will experience tensile loads. There are lot types of mechanical property for glass reinforced plastic such as flexural strength. Flexural strength is maximum fiber stress developed in a specimen just before it cracks or breaks. Flexural properties of composite are obtained by placing a specimen on two supports span. In determining the flexural property of composite material, it has two similar standard test methods in collecting the flexural data. The two nearly similar standards have developed by two established standard organization body, American Society for Testing Material (ASTM) and British Standard Organization (BSI). Even though these two methods nearly similar, but it is not technically equivalent between them. This study will performed this two methods and comparative study will be done to identify the differences. The composite specimen will be tested according to ASTM 790, which was developed by ASTM and also based on BS ISO 178 that was developed by BSI. Three point bending test method will be used as it is the similar method that was used in ASTM 790 and BS ISO 178 which is used to determine flexural properties in plastic or composite material.

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