Polypropylene/Carbon Fiber Composite Layered Materials: Electromagnetic Interference Shielding Effect and Mechanical Performance

Author(s):  
Mei-Feng Lai ◽  
Chen-Hung Huang ◽  
Jia-Horng Lin ◽  
Yu-Chun Chuang ◽  
Ching-Hua Wang ◽  
...  
Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1319 ◽  
Author(s):  
Ran Li ◽  
Huiping Lin ◽  
Piao Lan ◽  
Jie Gao ◽  
Yan Huang ◽  
...  

Lightweight electromagnetic interference shielding cellulose foam/carbon fiber composites were prepared by blending cellulose foam solution with carbon fibers and then freeze drying. Two kinds of carbon fiber (diameter of 7 μm) with different lengths were used, short carbon fibers (SCF, L/D = 100) and long carbon fibers (LCF, L/D = 300). It was observed that SCFs and LCFs built efficient network structures during the foaming process. Furthermore, the foaming process significantly increased the specific electromagnetic interference shielding effectiveness from 10 to 60 dB. In addition, cellulose/carbon fiber composite foams possessed good mechanical properties and low thermal conductivity of 0.021–0.046 W/(m·K).


2021 ◽  
pp. 002199832110495
Author(s):  
Yinan Wang ◽  
Fu-Kuo Chang

This work presents numerical simulation methods to model the mechanical behavior of the multifunctional energy storage composites (MESCs), which consist of a stack of multiple thin battery layers reinforced with through-the-hole polymer rivets and embedded inside carbon fiber composite laminates. MESC has been demonstrated through earlier experiments on its exceptional behavior as a structural element as well as a battery. However, the inherent complex infrastructure of the MESC design has created significant challenges in simulation and modeling. A novel homogenization technique was adopted to characterize the multi-layer properties of battery material using physics-based constitutive equations combined with nonlinear deformation theories to handle the interface between the battery layers. Second, mechanical damage and failure modes among battery materials, polymer reinforcements, and carbon fiber-polymer interfaces were characterized through appropriate models and experiments. The model of MESCs has been implemented in a commercial finite element code in ABAQUS. A comparison of structural response and failure modes from numerical simulations and experimental tests are presented. The results of the study showed that the predictions of elastic and damage responses of MESCs at various loading conditions agreed well with the experimental data. © 2021


1991 ◽  
Vol 31 (17) ◽  
pp. 1279-1285 ◽  
Author(s):  
L. Caramaro ◽  
B. Chabert ◽  
J. Chauchard ◽  
T. Vu-Khanh

2014 ◽  
Vol 895 ◽  
pp. 452-459 ◽  
Author(s):  
Mohd Shafiq Ruslan ◽  
Sue Ping Chew ◽  
Mahadi Sharif ◽  
A.A. Azid ◽  
A. Yusof

Electromagnetic Interference (EMI) shielding materials commonly refers to how effective the material in limiting the passage of electromagnetic radiation into the devices. This undesired interference may cause disturbances to the performance of the any electrical systems. Thus, with effective EMI shielding materials, electromagnetic radiations are blocked with barriers made of conductive materials. In military field, the operation of certain communication equipments such as radar system can be interfered by disturbances due to the electromagnetic radiation emitted by external sources. This paper presents the investigations on non-metal materials which are Polyvinyl Chloride (PVC) and carbon fiber composite as EMI shielding materials in building construction. These shielding materials are placed in the concrete block which casted based on the standard wall building of grade 30. These customized structures are proven to reduce signal penetration significantly in the high frequency range up to 2.4 GHz.


2013 ◽  
Vol 753-755 ◽  
pp. 1074-1077 ◽  
Author(s):  
Bin Li ◽  
Zhuo Yi Yang ◽  
Xiao Meng Zhu ◽  
Lei Song

According to the design method of composite material mechanics based on laminate theory, structure of an underwater vehicle, which is made of twill woven carbon fiber composite material, was analyzed simulatively under the lifting condition with the finite element analysis software. Performance parameters of the laminated composite material were obtained from the mechanical performance testing experiment and applied to the analysis. In the two point handling condition, for the underwater vehicle structure, maximum deformation or displacement has a large safety redundancy to the test standard value. And the structure maximum stress is far less than the allowable strength limit of carbon fiber laminated plate acquired from the tensile experiment. It has an obvious advantage compared with metal frame structures.


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