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A hydrogen storage tank made from carbon fiber reinforced plastic (CFRP) laminates suffers from fatigue damage due to hydrogen filling and discharging during long-term operation. Accurately assessing the progression of fatigue damage to maintain the structural integrity of the composite hydrogen tank is crucial. This study investigates the effect of mesh size on assessing residual stiffness during a three-point bending fatigue simulation and finds the intra-laminar fatigue damage parameters. The composite laminate comprises of T720SC-3600-50C fiber and Bis-A type epoxy resin with \(\left[{\pm \;45} \right]_{2s}\) winding angle. Fatigue damage during simulation is implemented using continuum damage mechanics (CDM) approaches to model the intra-laminar damage. The fatigue simulation also adopts the cycle jump strategy to reduce the computational cost. The numerical method successfully obtained the fatigue damage parameters, which can capture the stiffness degradation that has a comparable result between the numerical and experimental.

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Numerical Simulation on Residual Strength of Composite Laminates After Three-Point Bending Fatigue Using Continuum Damage Mechanics

  • 会议论文

  • 发表日期：

    2025年

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  • Rachmadi Norcahyo,
  • Ryoma Aoki,
  • Tomohiro Yokozeki

摘要

A hydrogen storage tank made from carbon fiber reinforced plastic (CFRP) laminates suffers from fatigue damage due to hydrogen filling and discharging during long-term operation. Accurately assessing the progression of fatigue damage to maintain the structural integrity of the composite hydrogen tank is crucial. This study investigates the effect of mesh size on assessing residual stiffness during a three-point bending fatigue simulation and finds the intra-laminar fatigue damage parameters. The composite laminate comprises of T720SC-3600-50C fiber and Bis-A type epoxy resin with \(\left[{\pm \;45} \right]_{2s}\) winding angle. Fatigue damage during simulation is implemented using continuum damage mechanics (CDM) approaches to model the intra-laminar damage. The fatigue simulation also adopts the cycle jump strategy to reduce the computational cost. The numerical method successfully obtained the fatigue damage parameters, which can capture the stiffness degradation that has a comparable result between the numerical and experimental.