A CRASHWORTHINESS SIMULATION FOR A LIGHT AIRCRAFT CONSTRUCTED OF COMPOSITE MATERIALS

2015 ◽  
Vol 39 (4) ◽  
pp. 829-843 ◽  
Author(s):  
Pu-Woei Chen ◽  
Kuan-Jung Chen
Keyword(s):  
Composite Material ◽  
Aluminum Alloy ◽  
Composite Materials ◽  
Fiber Composite ◽  
Impact Angle ◽  
The Finite Element Method ◽  
Dynamic Impact ◽  
Carbon Fiber Composite ◽  
Impact Speed ◽  
Impact Simulations

This study analyzes the crashworthiness of a light aircraft that is constructed from composite materials. The finite element method is employed to conduct dynamic impact simulations on carbon fiber composite fuselages. The results show that the safe impact speed for an aluminum alloy cockpit crashed at a 30° impact angle is 9.59 m/s, but a cockpit made of composite material can withstand a speed greater than 18.05 m/s. The safe impact angle for an aluminum alloy cockpit is 16.56°, but that for a composite cockpit is 84.9°. The safety crash zone for a composite material cockpit is 160% greater than that for an aluminum alloy cockpit.

Research on EIS-Based Anomaly Detection Technique for Composite Materials

2014 ◽  
Vol 556-562 ◽  
pp. 3056-3059
Author(s):  
Chao Sun ◽  
En Sheng Dong ◽  
Yong Heng Li ◽  
Bing Zhu
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Anomaly Detection ◽  
Fiber Composite ◽  
Electrical Impedance Spectroscopy ◽  
Carbon Fiber Composite ◽  
Advanced Composite ◽  
Advanced Composite Materials ◽  
Unit Model ◽  
Double Electrode

The application of advanced composite materials in airplane is becoming more and more. Along with the increase of its service time, it may be abnormal. It needs to take an anomaly detection. The electrical impedance spectroscopy (EIS) is applied to the anomaly detection of composite material components in airplane. A uniplanar sensor with double-electrode and two carbon fiber composite samples are made, an experiment circuit is designed. In order to verify the effectiveness of the experimental circuit, the EIS of the Randles unit model circuit is measured, as well as the two composite material samples using the dual-electrode measurement method. The picture of EIS is drawn in Matlab and comparison and analysis are carried out. The preliminary experimental results indicate that the anomalies can be seen by measuring the EIS of the composite materials. It is feasible for the EIS to be applied in the anomaly detection of the composite materials in airplane.

The Application of Carbon Fiber Composite Material for Sports Equipment

2012 ◽  
Vol 496 ◽  
pp. 480-483 ◽  
Author(s):  
Xue Bai ◽  
Ning Li
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Advanced Stage ◽  
New Materials ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material ◽  
Fiber Composite Materials

With the development of science and technology, the requirements on the properties of new materials was increasing, the research and production of carbon fiber arriving an advanced stage. In the field of sports, carbon fiber composite material was widely used in sports equipment, this study illustrates the unique advantages of carbon fiber composite materials applied to sports apparatus, reveals the important role of carbon fiber and its composites on the modern sports development by describing the molding technology and typical examples

Effect of Vibration Characteristics for Carbon Fiber Composite Materials on Musical Instruments Making

2014 ◽  
Vol 508 ◽  
pp. 66-69
Author(s):  
Min Lv ◽  
Ji Li Sun
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Layer Structure ◽  
Fiber Composite ◽  
Single Layer ◽  
Vibration Characteristics ◽  
Material Structure ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material

Carbon fiber and its composite materials have a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance and small thermal expansion coefficient, which can be widely applied to musical instrument manufacturing field. This paper introduces the structure and performance of carbon fiber, and mainly introduces the latest application of carbon fiber composite material, and the effect of vibration characteristics on musical performance. This paper also puts forward that for instrument design material substitutes the use of carbon fiber composite material structure of 2 layers and 3 layers structure should be considered, and the single layer structure is not feasible.

Investigations on the axial cutting force during drilling of carbon fiber composite material

2017 ◽  
Vol 232 (13) ◽  
pp. 2430-2436 ◽  
Author(s):  
Mingyang Wu ◽  
Yong Chen ◽  
Guangbin Yu ◽  
Yongbin Gao ◽  
Mulin Tong
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Cutting Force ◽  
Fiber Composite ◽  
Parameters Optimization ◽  
Force Model ◽  
Carbon Fiber Composite ◽  
Fiber Composite Material ◽  
Fiber Composite Materials

Carbon fiber composite materials have been widely applied in national defense fields, including aviation and aerospace, as well as civilian areas, such as automobile, electronic information, and high-speed machinery. During drilling, the cutting force significantly influences the workpiece machining quality and the insert service life. In this article, a simulation study using a polycrystalline diamond insert to drill carbon fiber composite materials was conducted in order to analyze the features of axial drilling force. Drilling experiments were carried out using various cutting parameters, and experimental results were compared to the simulation results. A regression analysis of the experimental data was made, and a cutting force model was constructed. The research results provide a foundation for the parameters optimization of carbon fiber composite material drilling processes.

Thickness Measurement of Composite Material Using Eddy Current Testing

2009 ◽  
Vol 79-82 ◽  
pp. 1995-1998 ◽  
Author(s):  
Pei Hua Chen ◽  
Ping Jie Huang ◽  
Bo Ye ◽  
Guo Hou Li ◽  
Ze Kui Zhou
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Eddy Current ◽  
Fiber Composite ◽  
Thickness Measurement ◽  
Carbon Fiber Composite ◽  
Specific Strength ◽  
Advanced Composite ◽  
Advanced Composite Materials

Composite materials have some obvious advantages such as high specific strength 、high specific modulus 、corrosion resistant 、abrasion resistant and so on, it is believed to be highly competitive compare to other materials. Advanced composite materials have been used more and more widely in defense industry, among them carbon fiber reinforced resin base composite material is most representative [1] ,there has great value for the study of carbon fiber composite materials. Eddy current is a nondestructive testing technology widely used on metal materials, the using of eddy current technology in aviation domain has a long history, but there is few reports on composite material with eddy current NDT. Experiments show that eddy current used on composite material is feasible, and the result is satisfactory. The thickness measurements of carbon fiber advanced composite materials have been done in two different ways.

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.

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