PSI - Issue 61

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com Procedia Structural Integrity 61 (2024) 195–205 Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Chairman 10.1016/j.prostr.2024.06.026 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Chairman This work proposes a framework for modeling multifunctional composite materials on the micro-scale, capable of serving as both a battery cell and a load-bearing component. It utilizes carbon fibers with high mechanical and electrical properties embedded in a polymer matrix. The microstructure simulates electrochemical-mechanical behavior during charging and discharging, emphasizing crack formation in the fibers. We employ the phase field fracture model to study crack propagation and damage evolution. This study employs finite element simulations with FENICS to investigate crack-dependent ion concentrations and stress distributions. Keywords: Fracture of Composites; Structural Batteries; Electro-Chemo-Mechanical Coupling, Phase Field Approach; Multifunctional Materials 1. Introduction In the aerospace and automotive industries, energy storage and a low thrust-to-weight ratio are two major concerns for future design improvements. Ongoing research aims to reduce vehicle weight by using carbon fiber composites more extensively, leveraging their high specific mechanical and electrical properties (Adam et al., 2018). In the structural battery concept, also known as the 3D battery, each fiber functions as its battery cell. Carbon fibers play dual roles as both the negative electrodes within each battery cell and as current collectors on the negative side. These individual fibers are coated with a thin layer of solid polymer electrolyte (SPE), a combined electrolyte and This work proposes a framework for modeling multifunctional composite materials on the micro-scale, capable of serving as both a battery cell and a load-bearing component. It utilizes carbon fibers with high mechanical and electrical properties embedded in a polymer matrix. The microstructure simulates electrochemical-mechanical behavior during charging and discharging, emphasizing crack formation in the fibers. We employ the phase field fracture model to study crack propagation and damage evolution. This study employs finite element simulations with FENICS to investigate crack-dependent ion concentrations and stress distributions. Keywords: Fracture of Composites; Structural Batteries; Electro-Chemo-Mechanical Coupling, Phase Field Approach; Multifunctional Materials 1. Introduction In the aerospace and automotive industries, energy storage and a low thrust-to-weight ratio are two major concerns for future design improvements. Ongoing research aims to reduce vehicle weight by using carbon fiber composites more extensively, leveraging their high specific mechanical and electrical properties (Adam et al., 2018). In the structural battery concept, also known as the 3D battery, each fiber functions as its battery cell. Carbon fibers play dual roles as both the negative electrodes within each battery cell and as current collectors on the negative side. These individual fibers are coated with a thin layer of solid polymer electrolyte (SPE), a combined electrolyte and 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Modeling of coupled behavior and microcracking of multifunctional composite structures for energy storage İmren Uyar a , Ercan Gürses a, * a Department of Aerospace Engineering, Middle East Technical University, Ankara 06800, Turkey Abstract Addressing energy storage limitations and achieving low thrust-to-weight ratios are paramount for innovation in the aerospace and automotive industries. A promising avenue lies in the multifunctionality of structural load-carrying members, mainly by incorporating energy storage capabilities. Carbon fibers, known for their exceptional mechanical and electrical properties, are ideal candidates for multifunctional applications (Adam et al., 2018). 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Modeling of coupled behavior and microcracking of multifunctional composite structures for energy storage İmren Uyar a , Ercan Gürses a, * a Department of Aerospace Engineering, Middle East Technical University, Ankara 06800, Turkey Abstract Addressing energy storage limitations and achieving low thrust-to-weight ratios are paramount for innovation in the aerospace and automotive industries. A promising avenue lies in the multifunctionality of structural load-carrying members, mainly by incorporating energy storage capabilities. Carbon fibers, known for their exceptional mechanical and electrical properties, are ideal candidates for multifunctional applications (Adam et al., 2018). * Corresponding author. E-mail address: gurses@metu.edu.tr * Corresponding author. E-mail address: gurses@metu.edu.tr