Shear Evolution of Fiberglass Composites Under Compression

摘要: Woven composites can offer mechanical improvements over more traditional engineering materials, yet understanding the complex interplay between fiber-matrix architecture during loading remains a challenge. This paper investigates evolution of shear failure behavior compression high performance fiberglass with varying resin binders at both quasi-static and dynamic strain rates. All samples are comprised commercially available woven glass cloth approximately 56 % fiber volume fraction. Laminates thermosetting silicone, melamine, epoxy were examined. High-speed imaging reveals that occurs within localized band region through multiple fiber-weave matrix interface characteristic macroscopic angle. The was spatially mapped using grayscale histograms light intensity in regions, resulting angles measured analyzed context Mohr-Coulomb criterion. Optical microscopy high-speed formation shows initiation appears due to local instabilities from kinking microbuckling, influenced by stacking interlacing regions tows.