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The present work focuses on comparing the damage mechanisms within the broader realm of Glass Fiber Reinforced Polymer composites when subjected to tension-tension (T–T), compression-compression (C–C) and tension–compression (T–C) fatigue loadings. Chopped Strand Mat (CSM) and Woven Roving Mat (WRM) composites were tested at room temperature with a stress ratio of R = 0.5 (T–T), 2 (C–C) and −1 (T–C). The Scanning Electron Microscopy analysis of edge sections revealed the formation of perpendicular microcracks in both composites under all cyclic loads. Notably, in the case of CSM composite, a key novel observation was the development of fatigue cracks parallel to the direction of loading. Finite Elements analysis of a single fiber Representative Volume Element revealed that fibers perpendicular to the loading direction are the most likely to form interface cracks. The analysis also highlighted the role of shear stress in the matrix in initiating parallel cracks in CSM composite. These findings highlight the distinct damage mechanisms arising from the differing fiber arrangements in CSM and WRM composites, providing valuable insights for optimizing their performance under cyclic loading conditions.

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Damage Mechanisms in Chopped Strand Mat and Woven Roving Mat Composites Subjected to Tension-Tension, Compression-Compression and Tension–compression Cyclic Loads

  • 会议论文

  • 发表日期：

    2026年

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  • Mritunjay M. Hiremath,
  • Timo Bernthaler,
  • Pascal Anger,
  • Sushil K. Mishra,
  • Anirban Guha,
  • Asim Tewari

摘要

The present work focuses on comparing the damage mechanisms within the broader realm of Glass Fiber Reinforced Polymer composites when subjected to tension-tension (T–T), compression-compression (C–C) and tension–compression (T–C) fatigue loadings. Chopped Strand Mat (CSM) and Woven Roving Mat (WRM) composites were tested at room temperature with a stress ratio of R = 0.5 (T–T), 2 (C–C) and −1 (T–C). The Scanning Electron Microscopy analysis of edge sections revealed the formation of perpendicular microcracks in both composites under all cyclic loads. Notably, in the case of CSM composite, a key novel observation was the development of fatigue cracks parallel to the direction of loading. Finite Elements analysis of a single fiber Representative Volume Element revealed that fibers perpendicular to the loading direction are the most likely to form interface cracks. The analysis also highlighted the role of shear stress in the matrix in initiating parallel cracks in CSM composite. These findings highlight the distinct damage mechanisms arising from the differing fiber arrangements in CSM and WRM composites, providing valuable insights for optimizing their performance under cyclic loading conditions.