Experimental investigation and numerical simulation of granite powder filled polymer composites for wind turbine blade: A comparative analysis

Abstract

This paper describes the mechanical, thermomechanical, and thermal behavior of unfilled E-glass fiber (10-50 wt%) reinforced polymer (GFRP) composites and granite powder filled (8-24 wt%) GFRP composite in different weight percentages, respectively. The void fraction of unfilled glass epoxy composite is decreased from 7.71% to 3.17% with the increase in fiber loading from 10 to 50 wt%. However, void fraction for granite powder filled GFRP composites show reverse in trend. The granite powder addition in glass-epoxy composites show significant improvement in hardness (37-47 Hv), impact strength (31.56-37.2 kJ/m 2 ), and stress intensity factor (by 14.29% for crack length of 5 mm) of the composites. The thermo-mechanical analyses also show strong correlation with the mechanical performance of the composites. The minimum difference of 0.17 GPa in storage and flexural moduli are observed for unfilled 20 wt% glass epoxy composite; whereas, maximum difference of 0.71 GPa is recorded for unfilled 50 wt% glass epoxy composite. Moreover, the numerical and experimentally measured thermal conductivity of unfilled and granite powder filled epoxy composites are within the lower and upper bound values. Hence, a successful attempt is presented for mechanical analysis of full scale model by finite element analysis. The results show that finite element analysis predicted reasonably actual stress value and tip deflection of wind turbine blade. POLYM. COMPOS.,

Waste marble dust‐filled glass fiber‐reinforced polymer composite Part I: Physical, thermomechanical, and erosive wear properties

“…The maximum E″ value was lowest for the composite EGM0 (0.669GPa) but increased considerably to remain at 0.777, 1.19, and 1.18 GPa for the 10, 20, and 30 wt% of marble dust‐filled composites, respectively. This may be attributed to the mobility of the epoxy resin molecules, where marble dust act as a barrier so that the movement in the resin molecules was slowed down thereby enhancing the E″ of the composites as found experimentally .…”

“…Amalgamation of increased marble dust restricts the mobility of the resin molecules under deformation, and thus, raises the values of E′ (30–91%) and E″ (59–161%) as shown in Fig. which resulted in increase in T g value .…”

Mechanical, dielectric, and thermal properties of polyarylene ether nitrile and boron nitride nanosheets composites

“…Comparing with the organic polymers, the metals and inorganic materials show much higher thermal conductive property. Hence, the most common way to increase the thermal conductivity of the polymers is the introducing of high thermal conductive fillers into the polymeric matrixes [21][22][23][24][25][26]. However, most of the metals and inorganic materials show poor compatibility with organic polymers, and the other properties of the resulting composite materials will significantly be affected.…”

Behavior of sisal fiber concrete cylinders externally wrapped with jute FRP

“…Most of the research mentioned focused on G/CFRP, to the best of authors' knowledge, in the literature, for natural FRP composites, only flax fibers in the form of pre‐fabricated tube were considered as confinement of concrete , so far, no studies have dealt with concrete specimens confined with wrapping jute fibers. Compared with conventional synthetic glass or carbon fibers, jute and sisal fibers offer further advantages such as lower cost, high impact resistance, high tensile and flexural strength‐to‐weight ratios, high toughness and fracture energy . Among these fibers, sisal is of particular interest because its composites have high impact strength as well as moderate tensile and flexural properties compared to other natural fibers .…”

“…Compared with conventional synthetic glass or carbon fibers, jute and sisal fibers offer further advantages such as lower cost, high impact resistance, high tensile and flexural strength-to-weight ratios, high toughness and fracture energy [25][26][27]. Among these fibers, sisal is of particular interest because its composites have high impact strength as well as moderate tensile and flexural properties compared to other natural fibers [25][26][27]. Therefore, an experimental investigation is performed to investigate the compressive behavior of sisal fiber reinforced concrete (SFRC) composite cylinders wrapped by jute FRP (termed as SFRC-JFRP).…”