Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates

Kristnama, Ashwin R.; Xu, Xiaodong; Nowell, David; Wisnom, Michael R.; Hallett, Stephen R.

Abstract

Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-isotropic carbon/epoxy laminates is reported. Oblique (45°) impacts between 100 m/s and 350 m/s were carried out using 3 mm steel cubes on the edge and the centre of the laminates, mounted as a cantilever beam. Impact induced damage was characterised using X-ray Computed Tomography (CT) and the residual strength of impacted laminates was determined through quasi-static tensile tests. The residual strength shows a strong dependence on the impact damage size, characterised in terms of fibre fracture width and delamination area. Machined notches were then investigated and compared to impacted laminates in terms of residual strength.

Citation

Kristnama, A. R., Xu, X., Nowell, D., Wisnom, M. R., & Hallett, S. R. (2019). Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates. Composites Science and Technology, 182, Article 107772. https://doi.org/10.1016/j.compscitech.2019.107772

• Journal Article Type: Article
• Acceptance Date: Aug 1, 2019
• Online Publication Date: Aug 6, 2019
• Publication Date: Sep 29, 2019
• Deposit Date: Feb 15, 2021
• Publicly Available Date: Feb 18, 2021
• Journal: Composites Science and Technology
• Print ISSN: 0266-3538
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 182
• Article Number: 107772
• DOI: https://doi.org/10.1016/j.compscitech.2019.107772
• Keywords: General Engineering; Ceramics and Composites; Laminate; Impact behaviour; Strength; Notch
• Public URL: https://uwe-repository.worktribe.com/output/7094451
• Additional Information: This article is maintained by: Elsevier; Article Title: Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates; Journal Title: Composites Science and Technology; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.compscitech.2019.107772; Content Type: article; Copyright: © 2019 Elsevier Ltd. All rights reserved.