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<p>The experimental studies of strain development, acoustic emission, and accumulation of microdamages in plain weave fabric CFRP under repeated static tension along the warp was presented. Measurements of strain were carried out by an optical extensometer. The loading scheme included up to 50-100 tension cycles with <i>R</i> = 0.1 followed by failure. The stress amplitudes were 25-90% of the static tensile strength. It was shown that cyclic tension led to cyclic creep, accumulation of microdamages, and straightening of warp threads. It was also noticed that the tangential modulus of elasticity and residual strength were increased. Acoustic emission phenomena were presented both in half-cycles of loading and unloading, so the Kaiser effect was not observed. The rupture of samples occurred at longitudinal strain of 1.50±0.6%.</p>

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Strain and Damage Kinetics in Woven CFRP at Ultra-Low Cycling Tension

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • E. V. Leshkov,
  • S. B. Sapozhnikov,
  • D. S. Lobanov,
  • E. A. Chebotareva

摘要

The experimental studies of strain development, acoustic emission, and accumulation of microdamages in plain weave fabric CFRP under repeated static tension along the warp was presented. Measurements of strain were carried out by an optical extensometer. The loading scheme included up to 50-100 tension cycles with R = 0.1 followed by failure. The stress amplitudes were 25-90% of the static tensile strength. It was shown that cyclic tension led to cyclic creep, accumulation of microdamages, and straightening of warp threads. It was also noticed that the tangential modulus of elasticity and residual strength were increased. Acoustic emission phenomena were presented both in half-cycles of loading and unloading, so the Kaiser effect was not observed. The rupture of samples occurred at longitudinal strain of 1.50±0.6%.