Simulation und experimentelle Verifikation zur entwicklungsbegleitenden Betriebsfestigkeitsbewertung von Verbundwerkstoffstrukturen

Abstract

Special-purpose vehicle manufacturing faces an increasing demand for developing lighter load-bearing structures. Fiber-reinforced plastics (FRP) are considered promising due to their exceptional strength-to-weight ratios, offering significant potential for weight reduction. The primary objective of this study is to develop a methodical approach for comprehensive static and fatigue-related strength assessment of FRP structures. Specifically, the focus is on an epoxy resin-based matrix system reinforced with continuous high-tensile carbon fibers. The methodology presented relies on a combination of component-independent expe- rimental trials and an innovative approach that integrates the method of representative volume elements (RVE) with numerical models at various scales (micro/meso/macro). This holistic approach allows for attributing the behavior of the entire system to the specific properties of the fiber and matrix. Particularly, the study emphasizes the analysis of imperfections in fiber distribution and their impact on structural integrity. The investigations offer a well-founded insight into the relevance of such imperfections and their effects on the performance of FRP structures. The presented methodology opens new avenues for practical development, especially in determining the optimal layering and fiber proportions in FRP structures. Thus, this work contributes to unlocking the full potential of fiber-reinforced plastics and establishing specific applications directly relevant to special-purpose vehicle manufacturing.