Effect of Thickness and Loading Rate on Mode I Fracture Toughness of Epoxy Resin
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Nowadays, polymer materials have begun to play a greater role in human life. Epoxy resin is one of the most widely used polymer materials because of its relatively high mechanical properties and can be easily molded due to its presence in the liquid state before forming. Epoxy resin has various used in many sections of industries due to its easily forming and making. A wide variety of applications result in different load characteristics or dimension of parts made from epoxy resin. In the use of parts made from epoxy resin or containing epoxy resin, it is found that the parts are mostly damaged under the lower load designed. Due to the design of those complex parts, it does not take into account the crack occur on the part. If the parts are complex, the important factor to consider is the fracture toughness of the material used to make the parts. Therefore, this research aims to study the fracture toughness of epoxy resin under mode I loading, which simulates a variety of applications by changing the range of variables, loading rates, and thickness of the specimen. For calculating the fracture toughness of epoxy resin, it is calculated using the finite element method. From the result, it was found that the loading rate and thickness of the specimen clearly affected the fracture toughness and fracture behavior of the epoxy resin under mode I loading.