The effect of the impactor diameter and boundary conditions on low velocity impact composites behaviour

• Type: Article in International Conference Proceedings Book
• Date: 2007

Authors

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

Conference proceedings International

Title: APPLIED MECHANICS AND MATERIALS

Pages: 217-222

5th International Conference on Advances in Experimental Mechanics

Manchester, ENGLAND, SEP 04-06, 2007

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 5 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-004-CBJ

Abstract (EN): The aim of present work is to study the influence of the impactor diameter and boundary conditions on low velocity impact on carbon-fibre-reinforced epoxy laminates. Experimental tests were performed on [0(4).90(4)](s) laminates, using a drop weight-testing machine. Circular plates were tested under low velocity impacts for two diameters of the hemispherical impactor, 12.7 mm and 20 mm, and considering similar impact energies, 2.6 J for the first impactor and 3 J for the second one. Rectangular and square plates were analysed under low velocity impacts with different boundary conditions. The impacted plates were inspected by X-radiography. Numerical simulations were also performed considering interface finite elements compatible with three-dimensional solid elements including a cohesive mixed-mode damage model, which allows to model delamination between layers. The impact tests showed that both the impactor's diameter and boundary conditions have influence on the delaminated area. Good agreement between experimental and numerical analysis for shape, orientation and size of damage was obtained.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6