On-line technique for measuring thickness for three-dimensional braided composite material preforms

• Autorzy: Wan Z. , Li J.
• Języki publikacji: EN

Abstrakty

EN

This paper presents an automatic method that can measure the thickness of three-dimensional (3-D) braided composite preforms. The thickness of 3-D braided composite material preform is an important parameter of 3-D braided composites. With the development of 3-D braided composite technology, an automated measurement technology for thickness of braided composite preform has become an importantgoal. The objective of this paper is to present an automatic measuring system. The system we devised consisted of a computer, a proximity sensor, a pressure sensor, an analog-to-digital converter and pulse motor, etc. The measuring principle and results are discussed in the paper. The system was tested on both carbon and glass fibre preforms. We obtained very encouraging results. Experiments showed the pressure and eddy current resistance value are important parameters for measuring the thickness of 3-D braided composite material preforms. The measuring precision is higher when the pressure value ranges from 0.6kg/cm2 to 0.8kg/cm2 and the eddy current resistance is 2kW for preforms made of carbon-fibre than of other substances.

Słowa kluczowe

EN

thickness measurement; three-dimensional braided; preform composite material; eddy current resistance; critical distance; power spectrum

PL

pomiar grubości; splatanie trójwymiarowe; materiał kompozytowy; oporność prądu wirowego; odległość krytyczna; spektrum mocy

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2005
• Tom: Vol. 5, no. 4
• Strony: 236--246
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Wan Z.

• Tianjin Polytechnic University Tianjin 300160, Repubilc of China

autor

Li J.

• Tianjin Polytechnic University Tianjin 300160, Republic of China

Bibliografia

• 1. M.H. Mohamed, A.E. Bogdanovich, L.C. Dickinson, J.N. Singletary, and R.B. Lienhart, “A New Generation of 3D Woven Fabric Preforms and Composites,” SAMPE J., 37(2001), pp. 8-17.
• 2. Gowayed, Yasser; Hwang, Jhy-Cherng; Chapman, Daryl, “Thermal conductivity of textile composites with arbitrary preform structures” J. of Composites Technology & Research,17(1995),pp.56-62.
• 3. Degrieck, J and Van Paepegem W, “Fatigue Damage Modelling of Fibre-Reinforced Composite Materials: Review”, Applied Mechanies Reviews,54 (2001),pp. 279-300.
• 4. http://www.helmut-fischer.com/Product_Group_overview_1.asp?PSG=0130&wg=11&CountryID=91&LanguageID=2, Hand-Held Instruments - DUALSCOPE® for magnetic induction and eddy current test methods.
• 5. Brian J. Tucker, Donald A. Bender, David G. Pollock, and Michael P. Wolcott, “Ultrasonic Plate Wave Evaluation Of Natural Fibre Composite Panels”, Wood and Fibre Science, 35( 2003) ,pp. 266–281.
• 6. http://www.cnaec.com.cn/guifan/02/W00-09.htm
• 7. John E. Masters and Marc A. Portanova, Standard Test Methods for Textile Composites, Lockheed Martin Engineering & Sciences Company,1996