Shielding effectiveness analysis of carbon fiber composite material using tensor impedance boundary condition (TIBC)

2017 ◽  
Author(s):  
Kai Wang ◽  
Jean-Jacques Laurin ◽  
Ke Wu
Keyword(s):  
Boundary Condition ◽  
Composite Material ◽  
Fiber Composite ◽  
Impedance Boundary Condition ◽  
Shielding Effectiveness ◽  
Carbon Fiber Composite ◽  
Impedance Boundary ◽  
Fiber Composite Material ◽  
Effectiveness Analysis ◽  
Tensor Impedance

Electrical conductivity identification of a carbon fiber composite material plate using a rotating magnetic field and multi-coil eddy current sensor

2018 ◽  
Vol 83 (2) ◽  
pp. 20901 ◽  
Author(s):  
Ahmed Chaouki Lahrech ◽  
Bachir Abdelhadi ◽  
Mouloud Feliachi ◽  
Abdelhalim Zaoui ◽  
Mohammed Naїdjate
Keyword(s):  
Magnetic Field ◽  
Neural Networks ◽  
Electrical Conductivity ◽  
Composite Material ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Rotating Magnetic Field ◽  
Current Sensor ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material

This paper proposes a contactless method for the identification of the electrical conductivity tensor of a carbon fiber composite materials plate using a rotating magnetic field and multi-coil eddy current sensor. This sensor consists of identical rectangular multi-coil, excited by two-phase sinusoidal current source in order to generate a rotating magnetic field and to avoid the mechanical rotation of the sensor. The fibers orientations, the longitudinal and transverse conductivities in each ply of carbon fiber composite material plate were directly determined with analysis of the impedance variation of each coil as function of its angular position. The inversion process is based on the use of artificial neural networks. The direct calculation associated with artificial neural networks makes use of 3D time-harmonic finite element method based on the A, V–A formulation.

Design of the Hybrid-Propeller Shaft Using Composite Materials

2013 ◽  
Vol 284-287 ◽  
pp. 687-691
Author(s):  
Hyun Sik Kim ◽  
Dong Pyo Hong ◽  
Hee Yong Kang
Keyword(s):  
Composite Material ◽  
Fiber Composite ◽  
Steel Structure ◽  
Performance Standards ◽  
Aluminum Surface ◽  
Material Research ◽  
Propeller Shaft ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material ◽  
The One

The propeller shaft of rear-wheel drive vehicle transfers power from the engine to rear wheels through the differential gear box. Generally the propeller shaft has a two-piece steel structure of more than 10kg of weight. In this paper, we designed the one-piece hybrid propeller shaft using the aluminum, carbon fiber composite material and glass fiber composite material. Research on the adhesive strength of the hybrid propeller shaft with respect to roughness of aluminum surface was conducted. The one piece hybrid propeller shaft satisfying the performance standards of propeller shaft such as statistic torsion torque strength and first bending natural frequency was manufactured. The manufactured hybrid shaft was assembled with the suitable connecting parts and analyzed for performance verification. This hybrid propeller shaft satisfies all performance standards of propeller shaft for automobile application. The hybrid shaft has vibration characteristics of 237Hz significantly higher than the standard characteristic of 150Hz of the existing two-piece steel structure propeller shaft.

Effect of Carbon Fiber Composite Material Casing on Blast Power of Explosive Charge

2009 ◽  
Vol 79-82 ◽  
pp. 461-464
Author(s):  
Wen Jin Yao ◽  
Xiao Ming Wang ◽  
Wen Bin Li ◽  
Xiao Hui Gu
Keyword(s):  
Composite Material ◽  
Carbon Fiber ◽  
Explosive Charge ◽  
Fiber Composite ◽  
Pressure Sensors ◽  
Positive Pressure ◽  
High Speed Photography ◽  
Collateral Damage ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material

A new kind of low collateral damage ammunition with Carbon fiber composite material casing is put forward. The operational principle of this ammunition and its configuration are introduced. Then the casting velocity of lethal unit and air shock wave pressure is analyzed theoretically and simulated. In order to study the effect of casing material on blast power, two different kinds of explosive charges are detonated. Overpressure curve of these two charges is measured using the pressure sensors. From the measured overpressure curve and theoretical simulation results, the duration of the positive pressure of the air blast pressure wave caused by the prototype model of the low collateral damage ammunition is bigger than the explosive charge with Carbon fiber composite material casing and naked explosive charge. From the high speed photography, the lethal units flight to a halt at a small distance. These results show the explosive charge with Carbon fiber composite material casing and metal powder can reduce destruction outside the radius of an intended target while enhancing its destructive force on the target.

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