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Investigation of exact analytical solutions for circular notched composite laminates under tensile loading

Koord, Josef and Stüven, Jan-Lukas and Petersen, Enno and Völkerink, Oliver and Hühne, Christian (2020) Investigation of exact analytical solutions for circular notched composite laminates under tensile loading. Composite Structures. Elsevier. doi: 10.1016/j.compstruct.2020.112180. ISSN 0263-8223.

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For the design of composite structures with circular cut-outs analytical, experimental and numerical methods are available. This paper investigates numerous exact analytical methods introduced in literature as an example of the Airbus Industries Test Method for determination of open hole tensile strength, conforming to AITM 1-0007. Experimental testing accompanied by digital image correlation of unidirectional 0° and 90° laminates as well as quasi-isotropic CFRP laminates with width-to-diameter (w/d) ratios of 3 and 5 is conducted. In addition, 3D finite element models of the test specimens are created for detailed analysis on lamina level. A preliminary study on numerous analytical methods introduced in literature shows that application of any of those methods results in one of two possible stress distributions. A qualitative comparison of 2D strain fields on laminate level reveals the high prediction quality of the analytical solutions. Furthermore, a detailed stress analysis on lamina level by comparison to a validated FE model is conducted. The results show that exact analytical solutions exhibit a satisfactory stress prediction quality for w/d ratios as low as 3 and thus can be recommended for preliminary design purposes.

Item URL in elib:https://elib.dlr.de/134638/
Document Type:Article
Title:Investigation of exact analytical solutions for circular notched composite laminates under tensile loading
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Koord, JosefUNSPECIFIEDhttps://orcid.org/0000-0002-2749-1546UNSPECIFIED
Stüven, Jan-LukasUniversität BremenUNSPECIFIEDUNSPECIFIED
Petersen, EnnoUNSPECIFIEDhttps://orcid.org/0000-0002-1488-5618UNSPECIFIED
Völkerink, OliverUNSPECIFIEDhttps://orcid.org/0000-0002-9589-1963UNSPECIFIED
Hühne, ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-2218-1223UNSPECIFIED
Date:1 July 2020
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:Laminates, Stress concentrations, Analytical modelling, Finite element analysis (FEA), Laminate mechanics, Mechanical testing, Digital image correlation (DIC), Open-hole-tension (OHT)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment, R - no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Koord, Josef
Deposited On:13 Apr 2020 11:01
Last Modified:13 Apr 2020 11:01

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