Detection and Imaging of Damages and Defects in Fibre-Reinforced Composites by Magnetic Resonance Technique

Autor(es)

Alves, Carine L. ^[1] ; Oliveira, Janete S. ^[1] ; Tannus, Alberto ^[2] ; Tarpani, Alessandra Cristina Soares P. ^[1] ; Tarpani, Jose R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Engn Sch Sao Carlos, Mat Engn Dept, BR-13590566 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Phys Inst Sao Carlos, Phys & Informat Dept, BR-13590566 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS; v. 14, n. 4 FEB 2021.
• Citações Web of Science: 0

Resumo

Defectively manufactured and deliberately damaged composite laminates fabricated with different continuous reinforcing fibres (respectively, carbon and glass) and polymer matrices (respectively, thermoset and thermoplastic) were inspected in magnetic resonance imaging equipment. Two pulse sequences were evaluated during non-destructive examination conducted in saline solution-immersed samples to simulate load-bearing orthopaedic implants permanently in contact with biofluids. The orientation, positioning, shape, and especially the size of translaminar and delamination fractures were determined according to stringent structural assessment criteria. The spatial distribution, shape, and contours of water-filled voids were sufficiently delineated to infer the amount of absorbed water if thinner image slices than this study were used. The surface texture of composite specimens featuring roughness, waviness, indentation, crushing, and scratches was outlined, with fortuitous artefacts not impairing the image quality and interpretation. Low electromagnetic shielding glass fibres delivered the highest, while electrically conductive carbon fibres produced the poorest quality images, particularly when blended with thermoplastic polymer, though reliable image interpretation was still attainable. (AU)

• Processo FAPESP: 14/20798-0 - Imageamento por ressonância magnética de danos e defeitos em compósitos laminados de matriz polimérica reforçados com carbono e componentes em escala real com o sensor (NMR-MOUSE)
• Beneficiário: Carine Lourenço Alves
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Iniciação Científica
• Processo FAPESP: 16/06009-8 - 21th European Conference on Fracture (ECF21)
• Beneficiário: José Ricardo Tarpani
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior