High strain rate characterisation of unidirectional carbon-epoxy IM7-8552 in longitudinal compression

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Koerber, H (Author) Other; Camanho, PP (Author) FEUP

Journal

Title: Composites Part A: Applied Science and Manufacturing

Vol. 42

Pages: 462-470

ISSN: 1359-835X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 71 Citations

ISI Web of Science

Scopus - 96 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences > Engineering > Aerospace engineering

Other information

Authenticus ID: P-002-S5Z

DOI: 10.1016/j.compositesa.2011.01.002

Abstract (EN): This paper presents an experimental investigation of the strain rate effect on unidirectional carbonepoxy IM7-8552 loaded in longitudinal compression. A dynamic compression fixture was developed for a split-Hopkinson pressure bar to test flat rectangular specimens. The dynamic experiment was designed by finite element analysis, using an axis-symmetric elastic model of the test setup. Due to the linear specimen stress-strain behaviour, ramp-shaped incident pulses were used, to ensure a constant strain rate and dynamic equilibrium throughout the test. The results from the split-Hopkinson pressure bar experiments at an average strain rate of about 100 s(-1) were compared with quasi-static test results using the same test setup. It was found that the longitudinal compressive modulus is not strain rate sensitive while a significant increase was observed for the longitudinal compressive strength.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9