PREDICTION OF STRESS-STRAIN CURVES OF WOVEN CARBON FIBER REINFORCED PLASTICS COMPOSITE THROUGH MULTI-SCALE ANALYSIS

초록

In this study, the method to predict the mechanical properties of woven carbon fiber reinforced plastics (CFRP) using multi-scale analysis was proposed. Recently, woven CFRP composites have been widely applied to structures due to their high strength and excellent fracture toughness. As the properties of these composites are determined by various factors such as yarn width, space, thickness, it has been difficult and time-consuming to evaluate their properties through experiments for each condition. We developed multi-scale analysis method of plain and twill woven composites using stress amplification factor (SAF) to predict the stressstrain curves of composites. Then, mechanical tests of composite specimens fabricated by resin transfer molding (RTM) were performed, and the results of tests were compared with multi-scale simulation result. With the proposed simulation modeling, it is expected to predict the mechanical properties of composites in a fast time and with high accuracy.

키워드