Detecting impact damage in carbon fabric/epoxy-matrix composites by ultrasonic F-scan and electrical resistance measurement

The status and the variation of electrical resistance of impacted carbon fiber/epoxy-matrix composites were studied by ultrasonic F-scan and electrical resistance measurement. The experimental results shows that impact damage energy threshold value of carbon fabric/epoxy-matrix composites can determine by using ultrasonic F-scan. When the impact energy exceeds the threshold value, damage is generated in composites. Electrical resistance of impacted composites is changed owing to the contact of each carbon fiber unit in composites, which cause a change of the series-parallel in conductors. The veracity of detecting impact damage in composites can be improved in this case.

[1]  Roger Davidson,et al.  Mechanical properties of composite materials containing embedded fiber-optic sensors , 1991, Other Conferences.

[2]  Chusheng Chen,et al.  Preparation and characterization of perovskite ceramic powders by gelcasting , 1999 .

[3]  Xiaojun Wang,et al.  Sensing damage in carbon fiber and its polymer-matrix and carbon-matrix composites by electrical resistance measurement , 1999 .

[4]  Liangjun Da.  Experimental Study on Optic Fiber Embedded in Carbon Fiber Composite Structure , 2000 .

[5]  G. Mook,et al.  A comparative investigation of electrical resistance and acoustic emission during cyclic loading of CFRP laminates , 2001 .

[6]  Akira Todoroki,et al.  Delamination identification of cross-ply graphite/epoxy composite beams using electric resistance change method , 2002 .

[7]  Jaycee H. Chung,et al.  Self-sensing of damage in carbon fiber polymer-matrix composite by measurement of the electrical resistance or potential away from the damaged region , 2005 .

[8]  THE DEVELOPMENT OF STRUCTURAL HEALTH MONITORING FOR CFRP COMPOSITE BY ELECTRICAL RESISTANCE METHOD , 2005 .

[9]  D. Chung,et al.  Effects of composite lay-up configuration and thickness on the damage self-sensing behavior of carbon fiber polymer-matrix composite , 2005 .

[10]  Phil E. Irving,et al.  Detection of impact damage in CFRP laminates by means of electrical potential techniques , 2007 .

[11]  Sheng Xinjun.  DYNAMIC RESPONSE OF A BOARD-LEVEL ELECTRONIC PACKAGE UNDER DROP IMPACT LOAD , 2008 .