A cohesive zone model to predict fatigue-driven delamination in composites

Autor(es)

de Oliveira, Lucas Amaro ^[1] ; Donadon, Mauricio Vicente ^[1]

Afiliação do(s) autor(es)

^[1] Aeronaut Inst Technol, Dept Aeronaut, Sao Jose Dos Campos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENGINEERING FRACTURE MECHANICS; v. 235, AUG 1 2020.
• Citações Web of Science: 0

Resumo

A cohesive zone model is proposed to analyse composite delamination propagation under high-cycle fatigue loading. A new method to compute the strain energy release rate at any point within the element fatigue life cycle range is presented. The proposed scheme is based on the J-integral method evaluated at an estimated position of the crack-tip within the element, instead of the element integration points. Furthermore, a new fatigue damage evolution law is proposed to account for the unwanted quasi-static damage during the element fatigue degradation process. The model prediction capabilities were verified against experimental data available in the literature and theoretical solutions using a double cantilever beam configuration for mode I loading, four-point end-notched flexure configuration for mode II loading, and mixed-mode bending configuration for mixed-mode loading. The simulations were performed at both constant and variable amplitude loading. The numerical predictions obtained using the proposed model correlated very well with literature's experimental data. (AU)

• Processo FAPESP: 15/16733-2 - Modelagem de Junções Coladas para Aplicações em Estruturas Aeronáuticas de Materiais Compósitos
• Beneficiário: Mariano Andrés Arbelo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado