A viscoelastic in-plane damage model for fibrous composite materials

Autor(es)

Quirino, Matheus Urzedo ^[1] ; Tita, Volnei ^[1] ; Ribeiro, Marcelo Leite ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS; DEC 2021.
• Citações Web of Science: 0

Resumo

This work presents a viscoelastic in-plane damage model for fibrous composites. The material behavior is modeled as linear viscoelastic, with brittle failure in the fiber-dominated direction, and progressive degradation of the matrix-dominated properties, when the composite is loaded perpendicularly to the fibers or in in-plane shear. An evaluation procedure has been performed by comparing computational stress-strain curves against tensile tests curves under three different displacement rates. In addition, a calibration of the viscoelastic properties, by means of the response surface methodology, is also presented. The proposed material model has shown reasonable performance up to the material reaching an experimentally-verified modulus transition zone. Besides, the viscoelastic calibration procedure has produced a good agreement with the experimental results, concerning maximum stresses. It was observed that the computational stress-strain curve has deviated from the experimental one for higher stress values, indicating that it is necessary to improve the assessment of the nonlinear phenomena, which occur within the material. (AU)

• Processo FAPESP: 19/15179-2 - Fabricação avançada de compósitos por enrolamento filamentar: avaliação da resistência residual de cilindros com rigidez variável após carregamento de impacto
• Beneficiário: Volnei Tita
• Modalidade de apoio: Auxílio à Pesquisa - Regular