Notched response of non-crimp fabric thin-ply laminates

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Arteiro, A (Autor) Outra; Catalanotti, G (Autor) Outra; Xavier, J (Autor) Outra; Camanho, PP (Autor) FEUP

Revista

Título: Composites Science and Technology

Vol. 79

Páginas: 97-114

ISSN: 0266-3538

Editora: Elsevier

Indexação

ISI Web of Knowledge - 72 Citações

Scopus - 87 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-005-1HE

DOI: 10.1016/j.compscitech.2013.02.001

Abstract (EN): This paper presents an experimental investigation of the mechanical response of a new class of advanced composite materials manufactured using thin non-crimp fabrics. Tensile and compressive tests in both unnotched and notched specimens were performed using two different lay-ups. The notched tests were based on specimens with central cracks and with circular holes, loaded in tension and compression. Digital image correlation was used to monitor the onset and propagation of damage on the surface plies. The results show that the lay-up with blocked plies and with higher differences in fiber orientation angles between consecutive plies has lower unnotched strength. However, due to the larger fracture process zone observed in the notched tests, such lay-up has marginally higher notched strengths. A size effect on the strength was observed for both the open-hole tension and compression tests. The size effect and the associated notch sensitivity of thin non-crimp fabrics were similar to those observed in typical aerospace grade unidirectional pre-impregnated composite materials. It is also concluded that the thin non-crimp fabrics exhibit an improved response to bolt-bearing loads over traditional composite materials.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 18