Influence of the specimen thickness on low velocity impact behavior of composites

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Ana M Amaro (Autor) Outra; Paulo Nobre B Balbis Reis (Autor) Outra; Marcelo de Moura (Autor) FEUP; Jaime B Santos (Autor) Outra

Revista

Título: Journal of Polymer Engineering

Vol. 32

Páginas: 53-58

ISSN: 0334-6447

Editora: Walter De Gruyter

Indexação

ISI Web of Knowledge - 9 Citações

ISI Web of Science

Scopus - 10 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-002-D45

DOI: 10.1515/polyeng-2011-0101

Abstract (EN): In this work, the influence of specimen thickness on low velocity impact behavior of carbon-epoxy composite laminates is studied. Plates with different thicknesses were tested under low velocity impact using a hemispherical impactor. The internal damage was mainly constituted by delaminations which were evaluated through the inspection of the impacted plates by the ultrasonic C-scan technique. It was observed that delaminations increase with plate thickness. In order to better understand the physical phenomenon explaining this result, a progressive damage model was used to simulate composites behavior under low velocity impact. In this context, a three-dimensional numerical analysis considering interface finite elements, including a cohesive mixed-mode damage model, which allows simulating delaminations onset and growth between layers, was performed. Good agreement was obtained between experimental and numerical analysis, which validated the proposed procedure. In addition, the proposed numerical methodology allowed identification of physical phenomena related to the influence of plate thickness on delamination size.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6