INTRODUCTION: Coupled thermal and electrical behavior of joints formed by two carbon-fiber reinforced polymers (CFRP) panels, but separated by intentional dielectric barriers such as adhesive is modeled to demonstrate the physics impacting high current conduction across the joints under lightning strike condition. CONCLUSIONS: A finite element based thermal-electrical multi-physics modeling of carbon-fiber joints is demonstrated to show the current distribution and heat dissipation across the joints for different configurations. The model was evaluated under lightning strike conditions to predict the non linear effects impacting current transfer across the joints. REFERENCES: 1. G. Abdelal, A. Murphy, “Nonlinear numerical modelling of lightning strike effect on composite panels with temperature dependent material properties,” Composite Structures 109(2014) 268-278. 2. T. Ogasawara, Y. Hirano, A. Yoshimura, “Coupled thermal-electrical analysis for carbon fiber/epoxy composites exposed to simulated lightning current,” composites: Part A41 (2010) 973-981. High Current and Multiphysics Modeling of Carbon Fiber Reinforced Polymers (CFRP) plates and Joints under Lightning Strike Conditions Soumitra Biswas 1 , Mark Mirotznik 1 1. Electrical and Computer Engineering Department, University of Delaware, Newark, DE, USA MULTI-PHYSICS MODEL: The time-varying joule heating source couples the electrical and thermal problem. The carbon-fiber composite materials have fully anisotropic, inhomogeneous, time and temperature dependent electrical and thermal conductivity. Model ignores the structural damage and magnetic effects. Figure 1. Multiphysics Model FINITE ELEMENT MODEL SETUP: The multiphysics modeling of joints formed by two carbon-fiber reinforced polymer (CFRP) plates, but separated by intentional dielectric barriers was modeled using COMSOL solver. The joints can be formed in any direction of the carbon fiber composite panel. Figure 3. Joint configuration Figure 7. Power dissipation with metallic fastener and edge conductor JOINT STUDY: Case II: time-varying current source via cylindrical hole Case IV: Carbon-fiber joint with metallic fastener and edge conductor Figure 2. Lightning strike waveform = zz zy zx yz yy yx xz xy xx T t z y x ) , , , , ( = zz zy zx yz yy yx xz xy xx k k k k k k k k k T t z y x k ) , , , , ( Case I: Voltage sources at the edges Fiber contact with fasteners likely have a large impact on current distribution and heating characteristics of the joint Figure 4. Power dissipation across the joint edges Figure 5. Power dissipation across the joint with through hole source Figure 6. Power dissipation across the joint with metallic fastener Case III: Carbon-fiber Joint with metallic fastener Excerpt from the Proceedings of the 2019 COMSOL Conference in Boston

High Current and Multiphysics Modeling of Carbon Fiber ......Soumitra Biswas1, Mark Mirotznik1 1. Electrical and Computer Engineering Department, University of Delaware, Newark, DE,

Download PDF Report

Upload
others
View
0
Download
0

Embed Size (px)

Citation preview

INTRODUCTION: Coupled thermal and electrical behavior ofjoints formed by two carbon-fiber reinforced polymers (CFRP)panels, but separated by intentional dielectric barriers such asadhesive is modeled to demonstrate the physics impactinghigh current conduction across the joints under lightning strikecondition.

CONCLUSIONS: A finite element based thermal-electricalmulti-physics modeling of carbon-fiber joints isdemonstrated to show the current distribution and heatdissipation across the joints for different configurations.The model was evaluated under lightning strike conditionsto predict the non linear effects impacting current transferacross the joints.REFERENCES:1. G. Abdelal, A. Murphy, “Nonlinear numerical modelling of lightning strike effect on composite panels withtemperature dependent material properties,” Composite Structures 109(2014) 268-278.2. T. Ogasawara, Y. Hirano, A. Yoshimura, “Coupled thermal-electrical analysis for carbon fiber/epoxy compositesexposed to simulated lightning current,” composites: Part A41 (2010) 973-981.

High Current and Multiphysics Modeling of Carbon Fiber Reinforced Polymers (CFRP) plates and Joints under Lightning Strike Conditions

Soumitra Biswas1, Mark Mirotznik1

1. Electrical and Computer Engineering Department, University of Delaware, Newark, DE, USA

MULTI-PHYSICS MODEL:The time-varying joule heating source couples the electricaland thermal problem. The carbon-fiber composite materialshave fully anisotropic, inhomogeneous, time and temperaturedependent electrical and thermal conductivity. Model ignoresthe structural damage and magnetic effects.

Figure 1. Multiphysics Model

FINITE ELEMENT MODEL SETUP: The multiphysics modeling ofjoints formed by two carbon-fiber reinforced polymer (CFRP)plates, but separated by intentional dielectric barriers wasmodeled using COMSOL solver. The joints can be formed inany direction of the carbon fiber composite panel.

Figure 3. Joint configuration

Figure 7. Power dissipation with metallic fastener and edge conductor

JOINT STUDY:

Case II: time-varying current source via cylindrical hole

Case IV: Carbon-fiber joint with metallic fastener andedge conductorFigure 2. Lightning strike waveform

=

zzzyzx

yzyyyx

xzxyxx

Ttzyx

),,,,(

=

zzzyzx

yzyyyx

xzxyxx

kkk

kkk

kkk

Ttzyxk ),,,,(

Case I: Voltage sources at the edges

Fiber contact with fasteners likely have a large impact oncurrent distribution and heating characteristics of the joint

Figure 4. Power dissipation across the joint edges

Figure 5. Power dissipation across the joint with through hole source

Figure 6. Power dissipation across the joint with metallic fastener

Case III: Carbon-fiber Joint with metallic fastener

Excerpt from the Proceedings of the 2019 COMSOL Conference in Boston