Delamination analysis using cohesive zone model: A discussion on traction-separation law and mixed-mode criteria

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. 228, APR 1 2020.
• Citações Web of Science: 0

Resumo

A discussion on cohesive zone model formulation for prediction of interlaminar damage in composite laminates is presented in this paper. The degradation of interlaminar mechanical properties is analysed from a physical point of view. Firstly, the damage evolution is evaluated according to the traction-separation law and it is demonstrated that if a linear elastic unloading/reloading curve is assumed, the softening function must also be linear. Secondly, issues regarding damage onset and fracture criteria in mixed-mode loading are critically addressed and commented. A new set of criteria is proposed, and the limitations of existing criteria are discussed. (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