STUDY ON THE LAMB PROPAGATION CHARACTERISTICS IN THE DELAMINATION DAMAGE AREA OF CFRP-STEEL BONDING INTERFACE

Abstract

Abstract: For the bonding interface delamination damage of CFRP-steel plate, the propagation and reflection process of Lamb wave in the delamination area is studied by displacement cloud of simulation. The influence of the delamination length on the damage echo is analyzed, and then the test is designed to verify the simulation conclusion. The displacement curve of the upper and lower interface nodes of delamination is extracted by simulation, and the cause of the Lamb wave′s high order harmonic is analyzed. The influence of the depth position, length of delamination and excitation amplitude on the nonlinear characteristics is studied. The research results shows that Lamb wave is more sensitive to the exit end of delamination, and in the region of thin side of delamination area the standing wave is generated. The reflection coefficient and the nonlinear coefficient of the wave all show the trend of vibration with the increase of the delamination length. When the delamination locates near the surface or the symmetrical center of the plate thick, the nonlinear characteristics are not obvious. The research work of this paper provides an important reference for the detection and application of Lamb wave aiming at the delamination damage of CFRP-steel bonding interface.

Key words: CFRP-steel, bonding interface, delamination damage, Lamb wave, propagation characteristics

CLC Number:

TB332

HE Chao-chao, LIU Zhi-ping, SHEN Yong, CHEN Shan. STUDY ON THE LAMB PROPAGATION CHARACTERISTICS IN THE DELAMINATION DAMAGE AREA OF CFRP-STEEL BONDING INTERFACE[J]. Fiber Reinforced Plastics/Composites, 2018, 0(10): 26-32.

References

[1] Colombi P, Fava G. Experimental study on the fatigue behaviour of cracked steel beams repaired with CFRP plates[J]. Engineering Fracture Mechanics, 2015, 145: 128-142.
[2] Ghafoori E, Motavalli M. Normal, high and ultra-high modulus carbon fiber-reinforced polymer laminates for bonded and un-bonded strengthening of steel beams[J]. Materials & Design, 2015, 67: 232-243.
[3] Ghafoori E, Motavalli M, Zhao X L, et al. Fatigue design criteria for strengthening metallic beams with bonded CFRP plates[J]. Engineering Structures, 2015, 101: 542-557.
[4] 艾春安, 刘瑜, 李剑,等. 基于经验模态分解的粘接结构缺陷定量检测[J]. 玻璃钢/复合材料, 2012(6): 3-7.
[5] Toyama N, Takatsubo J. Lamb wave method for quick inspection of impact-induced delamination in composite laminates[J]. Composites Science & Technology, 2004, 64(9): 1293-1300.
[6] Peng H, Ye L, Meng G, et al. Concise analysis of wave propagation using the spectral element method and identification of delamination in CF/EP composite beams[J]. Smart Materials & Structures, 2010, 19(8):085018.
[7] Liu Z, Yu H, He C, et al. Delamination detection in composite beams using pure Lamb mode generated by air-coupled ultrasonic transducer[J]. Journal of Intelligent Material Systems & Structures, 2014, 25(5): 541-550.
[8] Ramadas C, Balasubramaniam K, Joshi M, et al. Interaction of guided Lamb waves with an asymmetrically located delamination in a laminated composite plate[J]. Smart Materials & Structures, 2010, 19(6):065009.
[9] Ng C T, Veidt M. Scattering of the fundamental anti-symmetric Lamb wave at delaminations in composite laminates[J]. Journal of the Acoustical Society of America, 2011, 129(3): 1288.
[10] Yelve N P, Mitra M, Mujumdar P M, et al. A hybrid method based upon nonlinear Lamb wave response for locating a delamination in composite laminates[J]. Ultrasonics, 2016, 70: 12-17.
[11] Yelve N P, Mitra M, Mujumdar P M. Detection of delamination in composite laminates using Lamb wave based nonlinear method[J]. Composite Structures, 2017, 159: 257-266.
[12] Soleimanpour R, Ng C T, Wang C H. Higher harmonic generation of guided waves at delaminations in laminated composite beams[J]. Structural Health Monitoring, 2017, 16(4): 400-417.
[13] Singh A K, Chen B Y, Tan V B, et al. Finite element modeling of nonlinear acoustics/ultrasonics for the detection of closed delaminations in composites[J]. Ultrasonics, 2017, 74: 89-98.
[14] Ichchou M N, Berthaut J, Collet M. Multi-mode wave propagation in ribbed plates. Part II: Predictions and comparisons[J]. International Journal of Solids & Structures, 2008, 45(5): 1196-1216.
[15] Alleyne D, Cawley P. A two-dimensional Fourier transform method for the measurement of propagating multimode signals[J]. Journal of the Acoustical Society of America, 1991, 89(3): 1159-1168.