INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 9, ISSUE 01, JANUARY 2020 ISSN 2277-8616 2668 IJSTR©2020 www.ijstr.org Strength And Behavior Analysis Of Honey Comb Sandwich Composite Structure SathishKumar.P, Neethimanickam.I, R.Robinston Jeyasingh Swikker, Maheswari.K.S Abstract: Composites are emerging as realistic alternatives to the metal alloys in many applications like automobiles, marine, aerospace applications, sports goods, etc. Fiber composites offer many advantages such as low specific gravity, tensile strength and modulus, compressive strength and modulus, better fatigue strength, etc. Due to the low specific gravity the strength weight ratio and modulus weight ratio of these composite materials are markedly superior to those of metallic materials. In this work it is concerned about the flexural behavior of honey comb sandwich composite plate. Jute and glass fiber as reinforcement, general purpose resin as matrix and coir pith, saw dust as fillers are used for the fabrication of composite plate. Corrugated structured glass fiber composite sheet, jute fiber sheet and glass jute hybrid composite sheets are prepared by hand layup technique. Two corrugated plates are binded together and flat face sheets are winded over it. Then resin is applied over it and allowed to cure. Thus the honey comb sandwich plate is fabricated. The prepared samples are tested in computerized universal testing machine with four point flexural fixture. Load vs. displacement curves are plotted and were recorded with digital camera. The failure pattern of the composites was analyzed and the results were compared. The samples are tested as empty and filled with saw dust and coconut coir. From the results it is observed that the composite plate filled with saw dust and coconut coir shows better flexural strength of up to 18% than the empty composite plate. Keywords : Fiber reinforced composites, honeycomb sandwich structure, flexural strength —————————— —————————— 1 INTRODUCTION Composite materials have a long history of usage. Their beginnings are unknown, but all recorded history contains references to some form of composite material. For example, straw was used by Israelites to strengthen mud bricks. Plywood was used by ancient Egyptians when they realized that wood could be rearranged to achieve superior strength and resistant to thermal expansion as well as to swelling owing to the presence of moisture. Medieval swords and armor were constructed with layers of different materials. Fiber glass, developed in the late 1940s, was the first modern composite and is still the most common. It makes up about 65 percent of all the composites produced today and is used for hulls, surfboards, sporting goods, swimming pool linings, building panels and car bodies. Fiber reinforced resin composites that have high strength to weight and stiffness-to-weight ratios have become important in weight-sensitive applications such as aircraft and space vehicles. This chapter dealt with the basic introduction about composites and the types of composites. It gives the introduction about the fiber reinforced composites. 2 EXPERIMENTAL DETAILS 2.1 Introduction This chapter describes about the proposed methodology of the project, pattern making process to fabricate the honey comb composite plate and introduction about the flexural analysis on composite plate. 2.2 Pattern making The project deals with the fabrication of honey comb sandwich composite plate. This composite plate has the structure of honey comb core and face sheets winded over it. For making the corrugated structure, a pattern made up of sheet metal is required. For this die is made in a size of 30.5cm x 30.5cm. To make this die first of all six mild steel plates of 30.5cm x 30.5cm dimension are welded together to get the flat surface and then six rods of 2.54cm diameter are placed over the flat surface at the equal center distance of 5.08 cm and welded together. Thus the die of dimension 30.5cm x 30.5cm is formed. Fig.1 Pattern used for fabrication To get corrugated structure the sheet metal is cut at a dimension of 48 cm x 30.5 cm and placed over the die and pressed over it. For obtaining the corrugated structured composite plate, the process required two corrugated shaped sheet. The final dimension of the corrugated structure pattern is 30.5cm x 30.5cm 2.3 Manufacturing of Squeegee The purpose of squeegee is to level the fiber and matrix. Composition and also remove the air bubbles from it end extra resin. The squeegee is made from a rod of 30mm diameter and 50mm of length. The MS rod is turned to required diameter of 50mm and external threads are mate on the rod hole of 12.5 mm rod drilled in the rod. As shown in figure3.3.the squeegee is manufactured. __________________________________ SathishKumar.P1, Neethimanickam.I2, R.Robinston Jeyasingh Swikker3, Maheswari.K.S4 Assistant Professor, Mechanical Engineering, Francis Xavier Engineering College, Vannarpettai, Tirunelveli, Tamilnadu. Professor, Mechanical Engineering, Francis Xavier Engineering College, Vannarpettai, Tirunelveli, Tamilnadu [email protected], [email protected], [email protected], [email protected]
Strength And Behavior Analysis Of Honey Comb Sandwich Composite Structure
Jun 24, 2023
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