Measurement of fracture toughness for fiber compressive failure mode of UD composites under high rate loading

• Type: Article in International Conference Proceedings Book
• Date: 2016

Authors

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

Conference proceedings International

Title: ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials

17th European Conference on Composite Materials, ECCM 2016

26 June 2016 through 30 June 2016

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-00M-QFG

Abstract (EN): This work presents an experimental study of the compressive crack resistance curve of an unidirectional composite when submitted 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. Under dynamic loading, the same strain rate is used for all specimen types to enable a reliable determination of the size effect. 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 compressive fracture toughness is found to increase with increasing strain rate.

Language: English

Type (Professor's evaluation): Scientific