A viscoelastic in-plane damage model for fibrous composite materials

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...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part L, Journal of materials, design and applications Journal of materials, design and applications, 2022-07, Vol.236 (7), p.1364-1378
Main Authors: Quirino, Matheus Urzedo, Tita, Volnei, Ribeiro, Marcelo Leite
Format: Article
Language:English
Subjects:
Calibration
Composite materials
Damage assessment
Fiber composites
Nonlinear phenomena
Response surface methodology
Stress-strain curves
Stress-strain relationships
Tensile tests
Viscoelasticity
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Summary: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.
ISSN:1464-4207
2041-3076
DOI:10.1177/14644207211065090