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Effective stiffness and thermal expansion of three-phase multifunctional polymer electrolyte coated carbon fibre composite materials

Schutzeichel, Maximilian Otto Heinrich and Kletschkowski, Thomas and Monner, Hans Peter (2021) Effective stiffness and thermal expansion of three-phase multifunctional polymer electrolyte coated carbon fibre composite materials. Functional Composites and Structures, 3 (1). Institute of Physics Publishing. doi: 10.1088/2631-6331/abec64. ISSN 2631-6331.

Full text not available from this repository.

Abstract

Multifunctional composites including polymer electrolyte coated carbon fibres and polymer matrix systems gained recent interest in light-weight design related research areas. Compared to classical fibre reinforced plastics, the interphase, made by electropolymerisation on the fibre surface, represents a new, third material phase. The coating serves as ion-conducting separator in structural batteries and as insulating layer in energy transmitting multifunctional composites. The importance of this study is related to the fact, that multifunctional applications, based on such composites, are exposed to temperature changes in many cases. The coating material, acting as thin interphase, shows a significant temperature dependant Youngs modulus, determining the overall macroscopic behaviour under thermal loads. The new influences on the effective elastic properties of the composite are determined in this work in a 3D microstructural simulation approach based on a unit cell geometry. For the first time, the resulting effective properties are discussed towards the state of research and future work. First, the effective elastic stiffness is computed by isothermal virtual material testing, applying unit strain modes on the unit cell. Second, a uniform temperature change is applied and the effective thermal expansion coefficients are computed. The results show that a change of stiffness in the coating domain has a great influence on the effective stiffness in the transversal isotropic plane. The effective thermal expansion of the composite is also highly sensitive to the thermal expansion behaviour of the coating phase. Main conclusions are drawn towards multiphysical material simulation: Influences of the coating material properties have to be taken into account to compute effective properties. In particular, it is necessary to include the temperature dependant stiffness and the coefficients of thermal expansion of the interphase, which affect effective properties significantly. A thermo-mechanic coupled microscale model is needed to represent in-situ properties of such composites for applications with heat exposure.

Item URL in elib:https://elib.dlr.de/145948/
Document Type:Article
Title:Effective stiffness and thermal expansion of three-phase multifunctional polymer electrolyte coated carbon fibre composite materials
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schutzeichel, Maximilian Otto HeinrichDepartment of Automotive and Aeronautical Engineering, Faculty of Engineering and Computer ScienceUNSPECIFIED
Kletschkowski, ThomasGerman Aerospace CenterUNSPECIFIED
Monner, Hans Peterhans.monner (at) dlr.dehttps://orcid.org/0000-0002-5897-2422
Date:March 2021
Journal or Publication Title:Functional Composites and Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:3
DOI:10.1088/2631-6331/abec64
Publisher:Institute of Physics Publishing
Series Name:Functional Composites and Structures
ISSN:2631-6331
Status:Published
Keywords:polymer-matrix composites (PMCs), functional composites, thermal properties, elastic properties, finite element analysis (FEA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Stanitzek, Silke
Deposited On:29 Nov 2021 07:43
Last Modified:29 Nov 2021 07:43

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