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Validation of the low-velocity impact damage prediction through analytical scaling

Bogenfeld, Raffael Marius and Kreikemeier, Janko and Wille, Tobias (2019) Validation of the low-velocity impact damage prediction through analytical scaling. Composite Structures, 209, pp. 715-726. Elsevier. DOI: 10.1016/j.compstruct.2018.11.011 ISSN 0263-8223

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Official URL: https://www.sciencedirect.com/science/article/pii/S0263822318325583?via%3Dihub

Abstract

The analytical scaling method for low-velocity impact permits an efficient application of impact analysis through high-fidelity numerical simulation. Structural impact scenarios can be analyzed on a small damage-prone section, called reference coupon. An analytical spring-mass model transfers the damage result from the reference coupon to the structural level. In this article, we investigate the validity of that scaling method. A large set of experimental impact scenarios forms the basis to identify the capabilities of scaled impact analysis. In a further critical assessment, we identify the corresponding limitations. These mainly concern the geometry of the impact configurations – the damage can shift its mode when the impact occurs close to supported edges or stiffening elements. Besides, the experimental results indicate an increased uncertainty from the reference impact to the total all scaled impact scenarios. Furthermore, the impact analysis through quasistatic scaling entails a systematic bias. Smaller damage than expected occurs in several cases. The excitation of higher-order vibration modes explains this observed bias. An initial value problem of the impact configuration allows conducting a modal energy correction. This energy correction explains the systematically too small size of scaled impact damage.

Item URL in elib:https://elib.dlr.de/127443/
Document Type:Article
Title:Validation of the low-velocity impact damage prediction through analytical scaling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bogenfeld, Raffael MariusRaffael.Bogenfeld (at) dlr.dehttps://orcid.org/0000-0003-3883-269X
Kreikemeier, Jankojanko.kreikemeier (at) dlr.deUNSPECIFIED
Wille, TobiasTobias.Wille (at) dlr.deUNSPECIFIED
Date:1 February 2019
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:209
DOI :10.1016/j.compstruct.2018.11.011
Page Range:pp. 715-726
Publisher:Elsevier
ISSN:0263-8223
Status:Published
Keywords:Impact damage, Low-velocity, Impact, Analytical methods, Damage computation, Structural Impact,Delamination
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation, L - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Bogenfeld, Raffael Marius
Deposited On:20 May 2019 07:49
Last Modified:20 May 2019 07:49

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