Fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using a multi-ΔG control method

Type Article
Date 2021-07
Language English
Author(s) Arhant MaelORCID1, Lolive Eric2, Bonnemains Thomas2, Davies PeterORCID1
Affiliation(s) 1 : IFREMER, Marine Structures Laboratory, Centre de Bretagne, Plouzané, France
2 : Institut de Recherche Dupuy de Lôme (IRDL - UMR CNRS 6027), Université de Bretagne Occidentale [UBO], France
Source Engineering Fracture Mechanics (0013-7944) (Elsevier BV), 2021-07 , Vol. 252 , P. 107825 (14p.)
DOI 10.1016/j.engfracmech.2021.107825
WOS© Times Cited 2
Keyword(s) Thermoplastic composites, Mode I, Fatigue crack growth
Abstract

The present paper presents a new multi-ΔG control approach to perform mode I fatigue crack growth tests using several constant cyclic energy release rate ranges (ΔG) on only one specimen. It was successfully applied on carbon/polyamide 6 unidirectional composite specimens. After validation checks on the approach, results show that the crack propagation behaviour exhibits three different crack propagation regimes that can be accurately described using the Hartman-Shijves equation. This work has shown that the multi-ΔG control method can provide reliable crack growth propagation results and a complete ΔG versus cycles description.

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