In Situ Microscopy of Fatigue-Loaded Embedded Transverse Layers of Cross-Ply Laminates: The Role of an Inhomogeneous Fiber Distribution

• DOI: 10.3390/jcs8090366
• Publication Date: 2024-09-18T13:49:19Z
• Authors: Andreas Baumann; Miro Duhovic; Joachim Hausmann
• Keywords: Cross ply

Composites with continuous fiber reinforcement offer excellent fatigue properties but are tedious to characterize due anisotropy and the interplay of properties, processing conditions, constituents. The global volume content can affect both monotonic strength. This dependence increase necessary testing effort even when conditions constituents remain identical. work presents an in situ edge observation method, enabling light microscopy during loading. As a result, digital image correlation be employed study local strains at cracking sites on scale bundles. geometric influence damage is examined non-crimp fabrics glass carbon fibers. Two epoxy resins (one modified by irradiation) investigated verify under changed polymer properties. microscopy-based revealed that forms very low only 0.2–0.3% fiber-reinforced laminates. For epoxy, laminate was found emanate mainly from regions containing stitching Across reinforcements, irradiation treatment led delayed cracks, emanating interfaces. detailed analysis formation used as basis for proposed applications strain information.