## Abstract

Fatigue damage calculations of unidirectional polymer composites is presented applying micromechanics theory. An orthotropic micromechanical damage model is integrated with an isotropic fatigue evolution model to predict the micromechanical fatigue damage of the composite structure. The orthotropic micromechanical damage model is used to predict the orthotropic damage evolution within a single cycle. The isotropic fatigue model is used to predict the magnitude of fatigue damage accumulated as a function of the number of cycles. The advantage of using this approach is the cheap determination of model parameters since the orthotropic damage model parameters can be determined using available data from quasi-static loading tests. Decomposition of the state variables down to the constituent scale is accomplished by micromechanics theory. Phenomenological damage evolution models are then postulated for each constituent and for interphase among them. Comparison between model predictions and experimental data is presented.

Original language | English |
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Pages | 101-108 |

Number of pages | 9 |

Publication status | Published - 04 Jul 2011 |

Event | AES-ATEMA’ 2011International Conference on Advances and Trends in Engineering Materials - Milan, Italy Duration: 01 Jul 2011 → 01 Jul 2011 |

### Conference

Conference | AES-ATEMA’ 2011International Conference on Advances and Trends in Engineering Materials |
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Country | Italy |

City | Milan |

Period | 01/07/2011 → 01/07/2011 |