Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

Kuhn, P (Autor) Outra; Catalanotti, G (Autor) Outra; Xavier, J (Autor) Outra; Camanho, PP (Autor) FEUP; Koerber, H (Autor) Outra

Revista

Título: Composite Structures

Vol. 182

Páginas: 164-175

ISSN: 0263-8223

Editora: Elsevier

Indexação

Scopus - 36 Citações

Outras Informações

ID Authenticus: P-00N-1NQ

DOI: 10.1016/j.compstruct.2017.09.040

Abstract (EN): This work presents an experimental method to measure the compressive crack resistance curve of fiber-reinforced polymer composites when subjected to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve. Double-edge notched specimens of four different sizes are used. Both split-Hopkinson pressure bar and quasi-static reference tests are performed. The full crack resistance curves at both investigated strain rate regimes are obtained on the basis of quasi-static fracture analysis theory. The results show that the steady state fracture toughness of the fiber compressive failure mode of the unidirectional carbon-epoxy composite material IM7-8552 is 165.6 kJ/m2 and 101.6 kJ/m2 under dynamic and quasi-static loading, respectively. Therefore the intralaminar fracture toughness in compression is found to increase with increasing strain rate. © 2017

Idioma: Inglês

Tipo (Avaliação Docente): Científica