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

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.

Keyword(s)

Thermoplastic composites, Mode I, Fatigue crack growth

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Arhant Mael, Lolive Eric, Bonnemains Thomas, Davies Peter (2021). Fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using a multi-ΔG control method. Engineering Fracture Mechanics. 252. 107825 (14p.). https://doi.org/10.1016/j.engfracmech.2021.107825, https://archimer.ifremer.fr/doc/00700/81173/

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