Effect of fatigue testing on the properties of Glass-Epoxy composites using the acoustic tool

Abstract

Abstract. This study presents the experimental results of the influence of mechanical fatigue on composite material. The plates of Glass fiber with SR 1500 epoxy resin with SD 2505 composite were realized by vacuum molding. Experimental tests were carried out on a standard hydraulic machine INSTRON 8516. The machine is interfaced with a dedicated computer for controlling and data acquisition. The fatigue tests were performed using sinusoidal type of waveform at a displacement control with frequency of 10 Hz. The evolution of Young's modulus and strain based on fatigue gives us an idea about the resistance of the material. Degradation of mechanical properties was observed, and the results have showed that the Young's modulus of plates undergo only minor changes. In fact, the residual stiffness and residual strength decrease when the cycle number of fatigue increase (100 to 50000 cycles), indicating that the studied composites have experienced some forms of mechanical damage.The mechanical tests were backed by Acoustic Emission Monitoring (AEM) during the load cycle, in order to understand the nature of the failure process in the composites such as fiber breakage, matrix crazing, matrix debonding and delamination etc.

Study of Bending Property for Epoxy / Kevlar - Glass Fibers and Hybrid Composite

“…The crack and delaminating appears in the samples as a result of shear stresses in the layers which is characteristic of bending test [10]. [11]. Fig.…”

Three‐point bending fatigue behavior of basalt‐carbon‐glass/epoxy hybrid composites under saltwater environment

“…Moreover, water absorption increases with the conditioning period. 14 Furthermore, the environmental effect of carbon/venylester composites under flexural fatigue shows fatigue life degradation; however, the morphology of the damaged region reveals a similarity between the dry and seawaterconditioned samples. 15 In addition, the microstructural behavior of composites under bending/flexural loading has been investigated by different researchers to formulate the fracture criteria of fiber-reinforced composites.…”

“…Several types of research were conducted to replace ship components with corrosion-resistant materials, like composites. 14,[22][23][24][25][26][27] Among these, Wei et al 28 investigated the effect of a corrosive environment (seawater treatment) on the tensile and bending of basalt/epoxy and glass/epoxy composites. The author reported that the mass gain on this composite is due to soluble material withdrawal and water absorption.…”