Damage detection of carbon reinforced composites using nondestructive evaluation with ultrasound and electromagnetic methods

International Conference on Innovative Research - ICIR Euroinvent 2016

Savin, A.^1 ; Barsanescu, P.D.^2 ; Vizureanu, P.^3 ; Stanciu, M.D.^4 ; Curtu, I.^4 ; Iftimie, N.^1 ; Steigmann, R.^1

National Institute of Research and Development for Technical Physics, Nondestructive Testing Department, Iasi, Romania^1

Gheorghe Asachi Technical University, Department of Mechanical Engineering, Mechatronics and Robotics, Iasi, Romania^2

Gheorghe Asachi Technical University, Department of Technologies and Equipment for Material Processing, Iasi, Romania^3

Transilvania University, Department of Mechanical Engineering, Brasov, Romania^4

关键词: Electrical conductivity;    Electromagnetic methods;    Electromagnetic testing;    Expansion coefficients;    High resolution sensors;    Non destructive evaluation;    Phased array ultrasound;    Reinforced composites;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/133/1/012013/pdf
DOI  :  10.1088/1757-899X/133/1/012013

来源: IOP

【 摘 要 】

CFRP have applications among most different domains due their low density, high elastic modulus and high ultimate strength along the carbon fibers direction, no fatigue and the expansion coefficient is small. This paper presents the behavior of carbon fiber woven-PPS composites at low velocity impacts. The transversal electrical conductivity is modified due to the plastic deformation following the impacts, and thus electromagnetic procedures can be used for assessment of CFRP using a high resolution sensor with metamaterials lens and comparing the results with those obtained from ultrasound testing with phased array sensor. The area of the delamination is overestimated when the method of phased array ultrasound is used and substantially underestimated by the electromagnetic testing. There were a good agreement between the simulations with finite element method and experimental measurements.