Notched response of non-crimp fabric thin-ply laminates

By A. Arteiro, G. Catalanotti, J. Xavier, Pedro P. Camanho. 2013

138 citations recorded by the source corpus.

Abstract 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.

Subfields: Civil and Structural Engineering, Mechanics of Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/e6bccf673fd6eb86fd987a029ea0e721161add98

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Civil and Structural Engineering

1. G. Catalanotti
2. A. Melro
3. A. Arteiro
4. Pedro P. Camanho
5. Y. Swolfs
6. L. Gorbatikh
7. I. Verpoest
8. Cláudio S. Lopes

In Mechanics of Materials

1. G. Catalanotti
2. A. Arteiro
3. A. Melro
4. Pedro P. Camanho
5. P. Linde
6. L. Gorbatikh
7. Y. Swolfs
8. I. Verpoest

In Polymers and Plastics

1. L. Gorbatikh
2. Y. Swolfs
3. A. Melro
4. Pedro P. Camanho
5. I. Verpoest
6. Stepan V. Lomov
7. P. Boisse
8. K. Bilisik

Citations in the corpus

• Thin ply composites: Experimental characterization and modeling of size-effects (2014, unknown): “Moreover, the pioneering articles on the performance of thin-ply composites mostly dealt with unidirectional thin-ply prepreg based laminates [1, 11-13] but more recent works have shown similar benefits for non-crimp fabrics [14].”
• Recent advances in fibre-hybrid composites: materials selection, opportunities and applications (2019, background): “as carbon fibre composites tend to be highly notch-sensitive [8,283], as they fail to blunt the stress concentrations like ductile materials do [284].”
• Micro-mechanical analysis of the in situ effect in polymer composite laminates (2014, background): “In addition, a truthful insight on the mechanics of thin-ply laminates is sought using the proposed micro-mechanical model, including a better understanding of their damage mechanics and of the mechanisms that preclude both microcracking and delamination, as observed elsewhere [4, 6, 10, 11, 19, 20,”