Investigating the Effect of Mechanical Properties of Composite Material under the Influence of Different Commercial Oils

In this work, with the purpose of studying the effects of oil absorption behavior on flexural and tensile strength properties, the glass fiber/epoxy composites were subjected to oil immersion tests, using universal multi-grade engine oil (20W-40) and an extra high performance hydraulic brake fluid (DOT3). The study has been accomplished by observing the weight changes, and how it affects the flexural properties and the tensile strength, after and before immersion in both the solutions. Flexural and tensile behaviour are the main mechanical properties evaluated, while they are supplemented with Rockwell hardness test, obtaining comprehensive mechanical information. However, for all tests performed, the automotive brake fluid (DOT 3) exhibited lower values compared to the automotive engine oil (20W40). These days, composite materials are used in several engineering applications, as a significance of their high specific strength and stiffness, viable cost, good static and dynamic properties, good resistance to corrosion and easy fabrication. In this perspective, these materials are exposed at diverse environment conditions, which influence notably their mechanical properties.