Skip navigation

The mechanism of rate-dependent off-axis compression of a low fibre volume fraction thermoplastic matrix composite

The mechanism of rate-dependent off-axis compression of a low fibre volume fraction thermoplastic matrix composite

Okereke, Michael ORCID: 0000-0002-2104-012X, Buckley, C. Paul and Akpoyomare, Ambrose I. (2017) The mechanism of rate-dependent off-axis compression of a low fibre volume fraction thermoplastic matrix composite. Composite Structures, 168. pp. 685-697. ISSN 0263-8223 (doi:10.1016/j.compstruct.2017.02.070)

[img]
Preview
PDF (Author Accepted Manuscript)
16409 OKEREKE_Rate-dependent_Off-axis_Compression_2017.pdf - Accepted Version

Download (3MB) | Preview

Abstract

This paper reports on the mechanism of rate-dependent off-axis compression of a unique unidirectional composite with unusually high matrix volume fraction of 65%. The test material is an E-glass fibre reinforced polypropylene composite and was subjected to quasi-static, medium and high strain rates (with strain rates from 10-3 s−1 to 103 s−1). This paper has shown experimental evidence of significant rate-dependence of yielding, strain softening and fracture strain of the test composite. Also, the study reports on the effect of strain rates on evolution of different failure modes of the composite. The observed rate-dependence was shown to result from the influence of the pure matrix on the constitutive behaviour of the composite. The work has used a two-process Ree-Eyring yield model of the matrix to demonstrate the origin of the observed rate-dependent yielding of the composite. The data derived in this study will be significant for further micro-mechanical modelling of finite deforming composites used in especially damage tolerant applications. Composite design engineers and stress analysis experts should benefit also from the findings in this work.

Item Type: Article
Uncontrolled Keywords: Thermoplastic matrix composites; Impact behaviour; Rate-dependence; Finite deformation; High strain rates
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Engineering Science
Last Modified: 12 Apr 2018 14:48
Selected for GREAT 2016: None
Selected for GREAT 2017: GREAT b
Selected for GREAT 2018: GREAT a
URI: http://gala.gre.ac.uk/id/eprint/16409

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics