HIGH PRESSURE RESISTANT GLASS FIBER REINFORCED POLYAMIDE MATRIX COMPOSITE PIPE DESIGN

Abstract

In this study, a total of 6 different composites were obtained by adding 10%, 20% and 30% short glass fiber in 6 mm dimensions to each of the polyamide 12 and polyamide 6 matrix elements under the same production method and same conditions. Unlike the studies in the literature, in this study, a more reliable comparison was made between composite materials produced under the same production method and under the same conditions. The reinforcement and matrix materials were mixed using the extrusion method and then formed into plates by the press molding technique. Tensile and 3-point bending tests of these composites were performed and their mechanical properties were examined. As a result of the study, it was observed that the mechanical properties of the materials increased with increasing fiber ratios, but the mechanical effect on the material decreased as the fiber ratio increased. S/N ratios were calculated for the mechanical properties of the composites and the effect of matrix, fiber and additive ratios on mechanical properties was determined using analysis of variance (ANOVA). According to the Signal/Noise (S/N) ratios and ANOVA results, it was observed that the composites had different effects on the mechanical properties. Looking at the test results, it was seen that the increased fiber ratio improved the mechanical properties of the materials. Therefore, pipes are designed considering the mechanical properties of composite materials with 30% glass fiber added to each matrix element. The composite pipe design to be pressure tested was designed in Solidworks program with a length of 500 mm according to ISO 1167 standards. Pipe dimensions with an outer diameter of 125mm, which are used as a standard in natural gas infrastructure works, are taken as reference