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A semi-analytical simulation strategy and its application to warpage of autoclave-processed CFRP parts

Kappel, Erik and Stefaniak, Daniel and Spröwitz, Tom and Hühne, Christian (2011) A semi-analytical simulation strategy and its application to warpage of autoclave-processed CFRP parts. Composites Part A: Applied Science and Manufacturing, 12 (42), pp. 1985-1994. Elsevier. DOI: 10.1016/j.compositesa.2011.09.001 ISSN 1359-835X

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Official URL: http://www.sciencedirect.com/science/article/pii/S1359835X11002855


The manufacturing of composite structures is accompanied by fabrication induced deformations. Those deformations are undesirable and lead to transgression of geometric tolerances in the finished parts. In order to get the part within aspired dimensional tolerances, geometrical compensation of the tool is necessary. This often iterative conducted tooling-rework is commonly time consuming and costly. This paper presents an shell element based. semi-analytical simulation approach focusing on warpage deformations due to tool part interaction, in order to account for manufacturing induced deformations within the tool design process. Deviation measurements on test specimen level serve as inputs for the calculation of equivalent coefficients of thermal expansion according to the proposed analytical model. Thus, ‘warpage properties’ of different prepreg – tool–material combinations are determined. The use and the practicability of the developed approach is demonstrated by means of the calculation of a warpage compensated tool surface.

Item URL in elib:https://elib.dlr.de/98999/
Document Type:Article
Title:A semi-analytical simulation strategy and its application to warpage of autoclave-processed CFRP parts
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kappel, Erikerik.kappel (at) dlr.deUNSPECIFIED
Stefaniak, Danieldaniel.stefaniak (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:December 2011
Journal or Publication Title:Composites Part A: Applied Science and Manufacturing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.compositesa.2011.09.001
Page Range:pp. 1985-1994
Keywords:Finite element analysis (FEA); Process-induced warpage; Layered Structures; Numerical analysis; Tooling
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 - Military Technologies, L - Simulation and Validation, L - Structures and Materials
Location: Braunschweig , Bremen
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Institute of Space Systems > Systemkonditionierung
Deposited By: Kappel, Dr.-Ing. Erik
Deposited On:30 Nov 2015 06:24
Last Modified:07 Oct 2016 09:51

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