Investigation of mechanical properties and transverse crack onset of thin-ply carbon-fiber composites in ambient and cryogenic conditions with varying fiber types

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008871
URN to cite this document: urn:nbn:de:bvb:703-epub-8871-9

Title data

Szpoganicz, Eduardo ; Hübner, Fabian ; Beier, Uwe ; Boutant, Edgard ; Ruckdäschel, Holger:
Investigation of mechanical properties and transverse crack onset of thin-ply carbon-fiber composites in ambient and cryogenic conditions with varying fiber types.
In: Composites Science and Technology. Vol. 273 (2026) . - 111401.
ISSN 1879-1050
DOI der Verlagsversion: https://doi.org/10.1016/j.compscitech.2025.111401

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Abstract

Transverse microcracking is a critical failure mode in carbon fiber-reinforced polymers (CFRPs) used in linerless cryogenic storage systems, yet reliable prediction of crack onset in cryogenic environments remains challenging. This study investigates CFRP laminates with different fiber moduli and ply thicknesses, and applies the LaRC03 embedded ply failure criterion to predict transverse crack initiation at 296 K and 77 K. The necessary engineering constants (energy release rates, tensile moduli, shear moduli) were measured for each system in both environments and used in the model. Results show that intermediate modulus fibers provide the best balance of toughness and modulus, providing the greatest resistance to 90° ply microcracking under cryogenic conditions. High-tenacity fibers improve resistance to opening-mode cracks but are more prone to shear-driven damage, especially at 296 K where deformation levels are higher. High-modulus fibers presented lower transverse crack onset strength in both environments due to inherent brittleness. Fiber diameter also affects crack initiation through its influence on the ply thickness-to-fiber diameter ratio. The LaRC03 model correlated well with experimental results in both environments, with greater agreement for laminates at 77 K testing.

Further data

Item Type:	Article in a journal
Keywords:	Carbon fiber; Thin-plies; Cryogenic testing; Transverse crack; Interlaminar toughness; LaRC03
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Polymer Materials
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8871-9
Date Deposited:	10 Feb 2026 12:55
Last Modified:	10 Feb 2026 12:55
URI:	https://epub.uni-bayreuth.de/id/eprint/8871

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