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February 5, 2026Polymer Composites

Fatigue Residual Stiffness Degradation of CFRP Laminates: A Probabilistic Model Considering Stress Level and Constraint Effect

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Authors

BWBoda WangJQJinhao QiuWYWeixing Yao

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Overview

A probabilistic model describes stiffness degradation in CFRP laminates, indicating its importance for structural reliability.

Key Points

  • This research aims to develop a probabilistic model to understand fatigue residual stiffness degradation in CFRP laminates under varying stress levels and constraints.
  • Developed a probabilistic model using a semi-empirical two-stage formulation.
  • Incorporated stress-dependent and constraint parameters to analyze nonlinear stiffness behavior.
  • Established probabilistic distributions of residual stiffness based on experimental data from various layup configurations.
  • Demonstrated significant dispersion in the fatigue stiffness of CFRP laminates due to complex damage mechanisms.
  • Captures the nonlinear degradation behavior of stiffness effectively.
  • Provides a unified framework for evaluating the fatigue reliability of CFRP laminates.

Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/698435f0f1d9ada3c1fb54dbhttps://doi.org/10.1002/pc.70885
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  4. 4A quantitative residual stiffness model for carbon fiber reinforced polymer tendons2024
  5. 5Prediction of CFRP longitudinal tensile strength distribution via probabilistic modeling of carbon fiber strength variability2025