The paper reports the results of an experimental investigation into the effect of stitching on the static and fatigue response of fibre-dominated and matrix-dominated laminates. The tests were conducted on stitched carbon/epoxy laminates with quasi-isotropic ([0/±45/90]s) or angle-ply ([+302/− 302]s, [+452/− 452]s, [+602/− 602]s) layups. The analyses show that stitching significantly reduces both the static and the fatigue strength of fibredominated [0/±45/90]s laminates, owing to the presence of localized fibre damage introduced during the stitching process. On the other hand, stitching does not affect the fatigue response of [+602/− 602]s laminates but significantly improves the fatigue strength of [+302/− 302]s and [+452/− 452]s laminates. The effectiveness of stitching on the fatigue performance of the angle-ply layups was found to be directly related to the specific damage mechanisms preceding the ultimate failure, which are controlled by edge delaminations in [+302/− 302]s and [+452/− 452]s and transverse matrix cracking in [+602/− 602]s laminates.

Effect of stitching on the static and fatigue properties of fibre-dominated and matrix-dominated composite laminates

Loi, G.
Primo
;
Aymerich, F.
Ultimo
2023-01-01

Abstract

The paper reports the results of an experimental investigation into the effect of stitching on the static and fatigue response of fibre-dominated and matrix-dominated laminates. The tests were conducted on stitched carbon/epoxy laminates with quasi-isotropic ([0/±45/90]s) or angle-ply ([+302/− 302]s, [+452/− 452]s, [+602/− 602]s) layups. The analyses show that stitching significantly reduces both the static and the fatigue strength of fibredominated [0/±45/90]s laminates, owing to the presence of localized fibre damage introduced during the stitching process. On the other hand, stitching does not affect the fatigue response of [+602/− 602]s laminates but significantly improves the fatigue strength of [+302/− 302]s and [+452/− 452]s laminates. The effectiveness of stitching on the fatigue performance of the angle-ply layups was found to be directly related to the specific damage mechanisms preceding the ultimate failure, which are controlled by edge delaminations in [+302/− 302]s and [+452/− 452]s and transverse matrix cracking in [+602/− 602]s laminates.
2023
3-Dimensional reinforcement; Fatigue; Stitching; Damage
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S1359835X23002245-main_compressed.pdf

accesso aperto

Tipologia: versione editoriale
Dimensione 982.27 kB
Formato Adobe PDF
982.27 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/365984
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact