Damage tolerance and notch sensitivity of bio-inspired thin-ply Bouligand structures
نویسندگان
چکیده
Different bio-inspired Bouligand thin-ply Carbon-Fibre-Reinforced Plastic (CFRP) laminates with a pitch angle as low 2.07∘ are realised, which is the smallest realised in literature. The therefore close angles found biological microstructures. Low-Velocity Impact (LVI) and residual compressive strength tests determined damage tolerance of structures. Investigated were two different interlaminar fracture toughnesses metal-Bouligand-CFRP-layups. results significantly higher strengths than 45∘ quasi-isotropic (QI) layups, despite lower proportion 0∘ fibres. Higher toughness hybridisation steel layers lead to reduced matrix without increasing strength. In-plane plane tension properties 2.59∘. reveal, that unnotched tensile lower. However, only helicoidal, sub-critical cracking no delaminations occur before final failure. leads almost notch sensitivity similar open-hole-tensile 45∘-QI layups number 0∘-fibres.
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ژورنال
عنوان ژورنال: Composites Part C: Open Access
سال: 2021
ISSN: ['2666-6820']
DOI: https://doi.org/10.1016/j.jcomc.2021.100146