Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Finite Element based Micromechanical Model to Simulate Fatigue Damage Development in Open-Hole Laminated Composites

Version 1 : Received: 6 September 2020 / Approved: 7 September 2020 / Online: 7 September 2020 (07:21:35 CEST)

How to cite: ghalandari, M.; Toozandehjani, H.; Mahariq, I. A Finite Element based Micromechanical Model to Simulate Fatigue Damage Development in Open-Hole Laminated Composites. Preprints 2020, 2020090158 (doi: 10.20944/preprints202009.0158.v1). ghalandari, M.; Toozandehjani, H.; Mahariq, I. A Finite Element based Micromechanical Model to Simulate Fatigue Damage Development in Open-Hole Laminated Composites. Preprints 2020, 2020090158 (doi: 10.20944/preprints202009.0158.v1).

Abstract

A micromechanical model is implemented to indicate the progressive fatigue problem of a laminated composite with a central circular hole under fatigue loading based on a finite element model. The mechanical properties of the composite lamina are represented based on the characteristics of the fiber and the matrix through a micromechanics model. An appropriate algorithm is then adopted to simulate fatigue damage development in the composite lamina. According to this algorithm, the stress field of the composite subjected to fatigue load is initially obtained using the finite element method. Finally, the predicted results of the stresses in the constituents i.e. fiber and matrix are determined according to the micromechanical bridging model. Finally applying proper damage driving relations leads to damage degree in each element. The proposed model is proven to be successful in the observation of the fatigue behavior with stiffness degradation in each element of the composite in each cycle. Results are reported and validated using those micromechanical models and experimental data available in the literature.

Subject Areas

progressive fatigue model; micromechanical model; finite element simulation; composite laminate

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