Structure-Related Non-uniformities in Composite Bars Made of Hybrid Dammar-Based Resin and Reinforced with Natural Fiber Fabrics

Abstract

The paper presents the factors characterizing the non-uniformities that might occur during the technological process of making composite materials. These factors were analyzed in cases of two types of composite materials made of hybrid Dammar-base resin and reinforced with hemp and linen fabric, respectively. Multilayer composite-made specimens with one or more interrupted layers of 2 cm or 4 cm were built. In the aftermath of a certain tensile stress applied on each and every composite material specimen, the elasticity factor, the strength factor and the uniformity factor (even factor) were experimentally found out.