A New Pair of Cumulative Fatigue Damage Models for Composite Materials

Peng Gang Mu; Xiao Peng Wan; Mei Ying Zhao

doi:10.4028/www.scientific.net/AMR.160-162.226

Paper Titles

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The Study of High-Voltage Insulation Space-Components Applying Resin Composites Modeling Technology
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Numerical Simulation of Welding for Vice-Frame Components
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A New Pair of Cumulative Fatigue Damage Models for Composite Materials
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The Strength of Vacuum-Free Diffusion Bonding Joints of Ni-Bi Alloys and ZrO₂ Ceramic
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Influences and Mechanisms of Ordinary Portland Cement on Properties of Asphalt Emulsion Composites
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Surface Yield Strength Gradient versus Residual Stress Relaxation of 7075 Aluminum Alloy
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Improving Life Cycle Human Toxicity Assessment in Pre-Training Electrolytic Aluminum Industry for Polycyclic Aromatic Hydrocarbons
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 160-162A New Pair of Cumulative Fatigue Damage Models for...

A New Pair of Cumulative Fatigue Damage Models for Composite Materials

Abstract:

Fatigue damage growth can be described by the gradual reduction of the stiffness and strength, and damage expressed by the two degradation methods are equivalent. According this assumption, a pair of cumulative fatigue damage models based on residual stiffness and residual strength is proposed, and then the connection between the two damage indices is established. The two damage models follow equation with the same form, but the parameters in them are not equal. Each of the two models contains three unknown parameters which have pertinent effect on the damage growth rates, in addition, the models also take into account of the effects of stress levels and stress ratios. By fitting the experimental data, it is observed that the parameters in damage functions obey the linear relation well, and the unknown constants are deduced with finite tests easily. Finally, the models are found to give a good description of fatigue damage evolutions of different stacking sequence for both of the stiffness and strength.