Investigation of mechanical characteristics of GFRP composites produced from chopped glass fiber and application of taguchi methods to turning operations

Abstract

Glass fiber-reinforced plastic (GFRP) composites take place in engineering materials owing to their low-weight and high-mechanical properties. In some cases, they need to be shaped by machining before using in industrial applications. However, when these composites are machined, many problems such as bad surface quality, rapid tool wear are encountered. Therefore, optimization of cutting parameters is essential to eliminate or minimize these problems. In this study, GFRP composites were produced by combining polyester matrix material with glass fibers (GF) having 6 mm, 6-12 mm, 12 mm fiber length, and 20%, 25%, 30% fiber ratio by weight. The tensile strengths of these composites were investigated. Turning tests were also performed with cutting speeds of 40, 80, and 120 m/min, feed rates of 0.1, 0.2 and 0.3 mm/rev, and depth of cut of 1, 2, and 3 mm, according to Taguchi L 27 standard orthogonal array method. The effect of fiber length and ratio, and cutting parameters on cutting forces and surface roughness were analyzed. As a result of the experiments, it was observed that the reinforced polymer matrix with GF provide to increase the tensile strength. The highest tensile strength was obtained as 55.95 MPa from the composite having a fiber length of 12 mm and a fiber ratio of 25%. Besides, the feed rate was determined as the most effective parameter among the all parameters on both cutting force and surface roughness. Therefore, the feed rate should be chosen low for lower cutting force and surface roughness values.

Modeling and optimization in turning of PA66-GF30% and PA66 using multi-criteria decision-making (PSI, MABAC, and MAIRCA) methods: a comparative study

“…V. N. [18] conducted an experimental study on machining PA66-GF30% with a metal carbide tool (K10) using Taguchi's method to obtain the optimal cutting regimes of responses (Pc and Ks) individually. Y.H çelik et al [19] applied Taguchi's approach in order to determine the optimal cutting regime of each response when turning GFRP. Also, other researches successfully applied Taguchi's approach to optimize the input factors when machining polymer [20][21].…”

Terahertz Spectroscopic Characterization and Thickness Evaluation of Internal Delamination Defects in GFRP Composites

“…lightweight, high strength, low thermal conductivity, high resistance to corrosion, good thermal and electrical insulation performance, etc. ), making them some of the most widely used materials for the manufacturing of structural parts in the aerospace, missile engine housing, electrical insulators, and construction industries [1][2][3]. However, both the design process and the material composition make GFRP composites vulnerable to several types of defects and structural damage such as cracks, fiber breakage, voids, and delamination which unavoidably affect their design performance during their in-service stage.…”

ISSI 2021: Terahertz Spectroscopic Characterization and Thickness Evaluation of Internal Delamination Defects in GFRP Composites

“…lightweight, high strength, low thermal conductivity, high resistance to corrosion, good thermal and electrical insulation performance, etc. ), making them some of the most widely used materials for the manufacturing of structural parts in the aerospace, missile engine housing, electrical insulators, and construction industries [1], [2]. However, several types of aws such as cracks and delamination will unavoidably affect the performance of these types of materials when in-service.…”