Tensile, impact and fatigue properties of fiber glass reinforced polyester composites

E-fiber woven glass (EFWG) reinforced composites have made great progress in the last few decades due to their useful properties, and have been used in many areas as an airspace, in aircraft, marine, sporting goods and automobile industry due to high strength compared to weight and lower cost. The properties mentioned in this article for composite materials such as high tensile strength in relation to weight, high fatigue resistance, which give excellent advantages to leaf springs when used instead of leaf springs made of steel, and therefore this type of composites can be applied in leaf springs used in cars instead of steel springs without any reduction on the load carrying capacity and stiffness in automobile suspension system. This article deals with the study of two types of glass fibers, the first type is regular (0-90) and another type is random, immersed in polyester. Both types are tested under stable load (tensile test, impact test) to obtain mechanical specifications and test under opposing dynamic load (tensile-compression) which is the fatigue test to obtain the fatigue life curve. The results showed that the tensile strength in the regular type is higher than the tensile strength in the random type, the impact test showed an increase in the energy required for fracture in the random type relative to the regular type and the number of cycles required to resist filar fatigue is higher in the regular type than in the random type.