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Study on the possibility of increasing the maximum allowable stresses in fibre-reinforced plastics

Luis Felipe Sánchez-Heres (Institutionen för sjöfart och marin teknik, Marine Design) ; Jonas Ringsberg (Institutionen för sjöfart och marin teknik, Marine Design) ; Erland Johnson
Journal of Composite Materials (0021-9983). Vol. 47 (2013), 16, p. 1931-1941.
[Artikel, refereegranskad vetenskaplig]

This article presents the results of a study aimed at investigating the possibility of increasing the maximum allowable stresses in fibre-reinforced plastics compared to current practice. The study consisted of a comparison between the maximum allowable stresses of a group of cross-ply laminates, determined by deterministic analyses with safety and model factors as stated in design rules, and their probabilistic responses estimated with a fracture mechanics based model that accounted for material degradation. The results suggest that for the studied cases, the maximum allowable stresses do not provide the desired reliability; thus, their increase cannot be motivated. More importantly, the investigation shows that a better understanding of the effects of matrix cracks, and therefore, the maximum allowable crack density in a composite laminate, would lead to better and safer composite structures.

Nyckelord: Cross-ply laminates, matrix cracking, probability of failure, safety



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Denna post skapades 2012-07-07. Senast ändrad 2016-01-12.
CPL Pubid: 160220

 

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Institutioner (Chalmers)

Institutionen för sjöfart och marin teknik, Marine Design (2012-2014)

Ämnesområden

Energi
Materialvetenskap
Transport
Hållbar utveckling
Innovation och entreprenörskap (nyttiggörande)
Sannolikhetsteori och statistik
Farkostteknik
Kompositmaterial och -teknik

Chalmers infrastruktur

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