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Fatigue of fibre reinforced plastics due to cryogenic thermal cycling

Lüders, Caroline and Sinapius, Michael (2019) Fatigue of fibre reinforced plastics due to cryogenic thermal cycling. Journal of Composite Materials, 53 (20), pp. 2849-2861. Sage Publications. doi: 10.1177/0021998319826359. ISSN 0021-9983.

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Official URL: https://journals.sagepub.com/eprint/M5HeKW66HAJBfvg2aHxU/full


Due to the different thermal expansion of the constituent materials, cyclic thermal loading of fibre reinforced plastics induces alternating stresses in the material at two scales: (1) at the microscale (level of fibre–matrix-interaction) and (2) at the macroscale (level of the multidirectional laminate). Especially the effect of the thermal-induced stresses at the microscale is not comprehensively investigated yet. In the present paper, the effects of both scales are analysed. For the investigation of the microscale effect, unidirectional laminates are thermally cycled between 293 K and 90 K up to 1000 times. Afterwards, by mechanical tests at room temperature, the elasticity and strength properties in the different material directions are determined as function of the number of thermal cycles. Additionally, thermally cycled specimens are microscopically investigated in order to observe the matrix crack forming process at thermal fatigue loading. Contrary to the expectations, no significant matrix cracking and therefore no significant reduction of the elasticity and strength properties due to the thermal cycling are observed. In order to analyse the effect of the superposition of the thermal-induced stresses on micro- and macroscale, cross-ply laminates are investigated in the same manner. In these laminates matrix cracks are detected after 1000 cycles, which, however, do not reduce the stiffness and strength of the cross-ply laminates

Item URL in elib:https://elib.dlr.de/131197/
Document Type:Article
Title:Fatigue of fibre reinforced plastics due to cryogenic thermal cycling
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Lüders, CarolineUNSPECIFIEDhttps://orcid.org/0000-0002-9661-7819UNSPECIFIED
Journal or Publication Title:Journal of Composite Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 2849-2861
Publisher:Sage Publications
Keywords:Fatigue, thermal cycling, fibre-reinforced plastics, cryogenic, microscale, macroscale, carbon fibre, epoxy resin
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Rail Transport
DLR - Research area:Transport
DLR - Program:V SC Schienenverkehr
DLR - Research theme (Project):V - NGT BIT (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Lüders, Dr.-Ing. Caroline
Deposited On:02 Dec 2019 08:55
Last Modified:02 Dec 2019 08:55

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