Residual strength after low velocity impact in carbon-epoxy laminates

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Amaro, AM (Author) Other; Reis, PNB (Author) Other; Moura, MFSF (Author) FEUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: ADVANCED MATERIALS FORUM III, PTS 1 AND 2

Vol. 26

Pages: 624-628

Indexing

ISI Web of Knowledge - 50 Citations

Scopus - 50 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-004-NWW

Abstract (EN): The aim of present work is to study the influence of low energy impacts on residual strength of carbon-epoxy laminates. Experimental tests were performed on [0,90,0,90](2s) and [0,90](8) laminates using a drop weight-testing machine. The influence of the laminate stacking sequence is analysed under 1.5 J, 2 J, 2.5 J and 3 J impact energies, corresponding to a 0.91 ms(-1), 1.05 ms(-1). 18 ms(-1) and 1.29 ms(-1) of impact velocity, respectively. The impacted plates were inspected by C-Scan to evaluate the size, shape and position of the delaminations through the thickness of the plate. The same plates were inspected by C-Scan before the impact, to evaluate the eventual presence of defects produced during the manufacturing process. The residual flexural strength showed that the [0,90,0,90](2s) laminates have better performance than the [0,90](8) ones. The explanation is related with the lower flexural stiffness of the antisymmetric lay-up relatively to the symmetric one.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5