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

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Kuhn, P (Author) Other; Catalanotti, G (Author) Other; Xavier, J (Author) Other; Camanho, PP (Author) FEUP; Koerber, H (Author) Other

Journal

Title: Composite Structures

Vol. 182

Pages: 164-175

ISSN: 0263-8223

Publisher: Elsevier

Indexing

Scopus - 36 Citations

Other information

Authenticus ID: 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

Language: English

Type (Professor's evaluation): Scientific