Studies On The Properties Of Short Okra-glass Fibers Reinforced Epoxy Hybrid Composites

 

Studies On The Properties Of Short Okra-glass Fibers Reinforced Epoxy Hybrid Composites

 

Abstract

In this work, theproperties of short okra- glass filaments corroborated epoxy resin mongrel mixes were studied. Critical fiber length of the okra fiber was studied at different lengths( 10 mm, 20 mm, 30 mm, 40 mm and 50 mm). Fiber length of 20 mm displayed the stylish optimal property values. The parcels attained were Tensile strength value of10.7 MPa, MoE value of698.8 MPa, impact strength of 20kJ/ m2, hardness of39.7 HRF and the least water immersion capacity of4.3. Grounded on these results, 20 mm was named as the critical length of the okra fiber. Hybridization of okra fiber with the glass fiber was grounded on the established 20 mm length of okra fiber. The stylish hybridization rate of okraglass was determined by varying the mongrel rate( 9010, 8020, 7030, 6040 and 5050). The 5050 okraglass rate was observed to have the stylish tensile strength value of12.4 MPa, MoE of 752MPa, extension and energy at break values of2.5 mm and4.6 J, impact strength of27.8 kJ/ m2, hardness of56.8 HRF and the least chance water immersion capacity of2.6. To ameliorate on the parcels of the compound, the okra fiber was treated with varying attention of NaOH result( 5, 10, 15 and 20) to determine the stylish treatment attention. The result showed that the 10 attention treated fiber compound displayed the stylish tensile strength, extension at break, MoE, hardness and energy at break with values of24.5 MPa, 29 mm, 786MPa,68.6 HRF and5.8 J independently. The 5 attention treated fiber compound displayed the loftiest impact strength, flexural modulus( MoR) and the least water immersion with values of64.3 kJ/ m2,50.4 MPa and1.9 independently.

 

 

 

 

 

Chapter One

Preface

Preamble

mongrel mixes involve two or further types of filaments set in common matrix( Dixit and Verma, 2012). The particular combination of fiber is generally named to balance strength and stiffness, give dimensional stability, reduce cost, reduce weight or ameliorate fatigue and fracture resistance( Moriteiro etal., 2005). The idea of mongrel fiber corroborated compound has been delved for a series of material combination. Hybridization ofcomposites made of natural filaments and synthetic filaments, can ameliorate the parcels of the natural fiber corroborated compound significantly( Mubarak etal., 2009).

The implicit advantages of combining two kinds of fiber in a singlepolymer matrix have been described by numerous experimenters. Jawaid and Abdul Khalil( 2011) reported that the geste of mongrel mixes appeared to be simply aweighted sum of the individual factors in which there’s a more favourable balance between the essential advantages and disadvantages. While using a mongrel compound in which two or further types of filaments are employed, the advantages of one type of fiber could congratulate what the other hybridized fiber lacks( Maya and Thomas 2008).

It’s generally accepted that the parcels of hybridcomposites are controlled by numerous factors similar as the nature of matrix, nature of the fiber, hybrid design, length and relative composition of the individual filaments, the fiber- matrix interface cling, arrangement of both the filaments and also on the failure strain of individual filaments( Sreekalaetal., 2002).