Abstract
<jats:p>This research aims to study the effect of fiberglass layers of skin and core thickness of ethylene vinyl acetate (EVA) foam cored sandwich composites on its interlaminar shear strength. The sandwich composite consists of fiberglass woven roving reinforced unsaturated polyester resin skin and EVA foam core, where the skin serves to resist shear loads, and the core serves as a structural support and reduces the overall weight of the composite. This study varied the EVA foam core thickness to 5 mm, 8 mm, and 10 mm, and the number of fiberglass skin layers to 2, 4, and 6 layers. The tests were conducted with a 500 kN capacity Universal Testing Machine (UTM) in accordance with ASTM D2344 standard. The test results showed that the interlaminar strength increased significantly as the number of skin layers increased. However, an increase in core thickness leads to a decrease in interlaminar strength. The main failure mode observed was delamination within the fiberglass skin layers.</jats:p>