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Analysis of dry-spot behavior in the pressure field of a liquid composite molding process

Bertling, Dominic and Kaps, Robert and Mulugeta, Eyob (2016) Analysis of dry-spot behavior in the pressure field of a liquid composite molding process. CEAS Aeronautical Journal, 7 (4), pp. 577-585. Springer. DOI: 10.1007/s13272-016-0207-2 ISBN 1869-5582 ISSN 1869-5582

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Official URL: http://dx.doi.org/10.1007/s13272-016-0207-2

Abstract

Due to industrial automation of liquid composite molding processes and increasing geometrical complexity of composite components, dry-spots from flow front junctions have become increasingly difficult to avoid. The impact and behavior of voids (microscopic or small macroscopic gas entrapments) during preform impregnation is well known, but no attention is given to dry-spots (large macroscopic gas entrapments). Experiments show that formation of a dry-spot in an early stage of an injection process does not necessarily lead to scrap parts. Therefore, simulation-based predictions of dry-spots are no sufficient condition for identification of unsuitable injection strategies. In this paper, the resolution mechanisms of dry-spots under controlled process conditions are investigated and the resulting findings of fundamental formation- and dispersion-mechanisms are presented.

Item URL in elib:https://elib.dlr.de/105949/
Document Type:Article
Title:Analysis of dry-spot behavior in the pressure field of a liquid composite molding process
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bertling, Dominicdominic.bertling (at) dlr.dehttps://orcid.org/0000-0003-1851-3333
Kaps, Robertrobert.kaps (at) dlr.deUNSPECIFIED
Mulugeta, Eyobeyob.mulugeta1 (at) gmail.comUNSPECIFIED
Date:31 August 2016
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:7
DOI :10.1007/s13272-016-0207-2
Page Range:pp. 577-585
Publisher:Springer
ISSN:1869-5582
ISBN:1869-5582
Status:Published
Keywords:Dry-spot, Void, Pores, Dispersion, Dissolution, Diffusion, Liquid composite molding, LCM
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 - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Composite Technology
Deposited By: Bertling, Dominic
Deposited On:14 Nov 2016 16:04
Last Modified:06 Sep 2019 15:24

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