CHARACTERIZATION OF COMPOSITE PLATE USING STRAIN INDICATOR WITH CYCLIC LOADING

Abstract

This work presents the development and testing of a composite specimen to analyze its fatigue behaviors of specimens with strain indicator and also identify the failure modes on composite specimens using Scanning Electron Microscope (SEM). A composite laminate made from glass fiber and epoxy, following ASTM standards, is subjected to cyclic loads using a laboratory scale model of fatigue testing machine. Strain values in the X, Y, and Z directions are measured during testing. By analyzing the relationship between stress and the number of loading cycles, the fatigue properties of the composite material are determined. This investigation offers valuable insights into how the material's mechanical properties change under repeated loading, ultimately leading to fatigue failure, and provides valuable data for assessing the durability and performance of composite materials under cyclic loading conditions. After post yielding, SEM as a microscopic observation is used to identify the failure modes of such as matrix cracking, fiber matrix debonding, fiber broken (crack propagation) from the tested specimens.

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