This article is an experimental study of the effects of multi-site damage on the vibration response of a composite beam damaged by low-energy impact. The variation of the modal parameters with different levels of impact energy and density of impact is studied. Specimens are impacted symmetrically in order to induce a global rate of damage. A damage detection tool Damage Index is introduced in order to verify the estimation of damping ratios. Design of Experiments is used to establish the sensitivity of both energy of impact and density of damage. The DOE analysis results (using natural frequency only) indicate that impact energy for 2nd, 3rd, and 4th bending modes is the most significant factor contributing to the changes in the modal parameters for this kind of symmetrical dynamic test.
Tsai, S.W. and Hann, H.T. ( 1980). Introduction to Composite Materials, Westposrt, Connecticut: Technic Publishing Company .
2.
Li, V.C. , Kanda, T. and Lin, Z. (1998). Influence of Fiber/Matrix interface properties on complementary energy and composite damage tolerance . Key Engineering Materials, 145, 465.
3.
Gadelrab, R.M. (1996). The effect of delamination on the natural frequencies of a laminated composite beam. Journal of Sound and Vibration, 197(3), 283-292.
4.
Doebling, S.W. , Farrar, C.R., Prime, M.B. and Shevitz, D.W. (1996). Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: a literature review. Research Report, LA-13070-MS, ESA-EA, Los Alamos National Laboratory.
5.
Adams, R.D., Cawley, P., Pye, C. and Stone, B.J. ( 1978). A vibration technique for non-destructively assessing the integrity of structures. Journal of Mechanical Engineering Science, 20-21, 93-100.
6.
Fugate, M.L., Sohn, H. and Farrar, C.R. ( 2001). Vibration-based damage detection using statistical process control. Mechanical Systems and Signal Processing, 15(4), 707-721.
7.
Waldron, K., Ghoshal, A., Schulz, M.J., Sundaresan, M.J., Ferguson, F., Pai, P.F. and Chung, J.H. ( 2002). Damage detection using finite elements and laser operational deflection shapes. Journal of Finite Elements in Analysis and Design, 38, 193-226.
8.
Sundaresan, M.J. , Pai, P.F., Ghoshal, A., Schulz, M.J., Ferguson, F. and Chung, J. (2001). Methods of distributed sensing for health monitoring of composite material structures. Composites A Journal, 32, 1357-1374.
9.
LeClerc, J.R. , Worden, K., Staszewski, W.J. and Haywood, J. (2007). Impact detection in an aircraft composite panel - a neural network approach. Journal of Sound and Vibration, 299(3), 672-682.
10.
Banks, H.T. , Inman, D.J., Leo, D.J. and Wang, Y. (1996). An experimentally validated damage detection theory in smart structures. Journal of Sound and Vibration, 191, 859-880.
11.
Yu, L. and Cheng, L. ( 2007). Experimental validation of vibration-based damage detection for static laminated composite shells partially filled with fluid. Composite Structures, 79(2), 288-299.
12.
Richardson, M.H. (1980). Detection of damage in structures from changes in their dynamic (modal) properties-a survey, NUREG/CR-1431 , U.S. Nuclear Regulatory Commission, Washington, District of Columbia.
13.
Tracy, J.J. and Pardoen, G.C. (1989). Effect of delamination on the natural frequencies of composite laminates. Journal of Composite Materials, 23(12), 1200-1215.
14.
Linder, D.K., Twitty, G.B. and Osterman, S. ( 1993). Damage detection for composite materials using dynamic response data, In: Adaptive Structures and Materials Symposium, ASME Winter Annual Meeting, New Orleans, Los Angeles.
15.
Garesci, F. , Catalano, L. and Petrone, F. (2006). Experimental results of a damage detection methodology using variations in modal parameters. Experimental Mechanics, 4, 441-451.
16.
Zou, Y. , Tong, L. and Steven, G.P. (2000). Vibration-based model-dependent damage (delamination) identification and health monitoring for composite structures - a review. Journal of Sound and Vibration, 230(2), 357-378.
17.
Khoo, L.M., Mantena, P.R. and Jadhav, P. ( 2004). Structural damage assessment using vibration modal analysis . Structural Health Monitoring, 3(2), 177-194.
18.
Mattson, S.G. and Pandit, S.M. (2006). Damage detection and localization based on outlying residuals. Smart Materials and Strcutures, 15, 1801-1810.
19.
Adams, R.D. and Cawley, P. (1979). The localisation of defects in structures from measurements of natural frequencies. Journal of Strain Analysis, 14, 49-57.
20.
Yam, L.H. and Cheng, L. (2005). Damage detection of composite structures using dynamic analysis. Key Engineering Materials , 295-296, 33-39.
21.
Giannocaro, N.I. and Messina, A. (2005). Fatigue damage evaluation of notched specimens through resonance and anti-resonance data. Engineering Failure Analysis, 13, 340-352.
22.
Shang, D.G. , Barkey, M.E., Wang, Y. and Lim, T.C. (2002). Effect of fatigue damage on the dynamic response frequency of spot-welded joints. International Journal of Fatigue, 25, 311-316.
23.
Arkaduiz, J.Z. (2005). Non-linear vibration of a delaminated composite beam. Key Engineering Materials, 293-294, 607-614.
24.
Adams, R.D. (1993). Damping in composites. Material Science Forum, 119-121, 3-16.
25.
Zhang, Z. and Hartwig, G. ( 2004). Relation of damping and fatigue damage of unidirectional fibre composites. International Journal of Fatigue, 24, 713-738.
26.
Gibson, R.F. (2000). Modal vibration response measurements for characterization of composite materials and structures. Composites Science and Technology, 60, 2769-2780.
27.
Saravanos, D.A. and Hopkins, D.A. (1995). Effects of delaminations on the damped dynamic characteristics of composites. Journal of Sound and Vibration, 192, 977-993.
28.
Colakoglu, M. (2003). Description of fatigue damage using a damping monitoring technique. Turkish Journal of Engineering and Environmental Sciences, 27, 125-130.
29.
Richardson, M.H. and Mannan, M.A. (1993). Correlating minute structural faults with changes in modal parameters. In: Proceedings of SPIE, International Society for Optical Engineering, pp. 893-898.
30.
Pandey, A.K. , Biswas, M. and Samman, M.M. (1991). Damage detection from changes in curvature mode shapes. Journal of Sound and Vibration , 145, 321-332.
31.
Morlier, J. , Bos, F. and Castéra , P. (2006). Diagnosis of a portal frame using advanced signal processing of laser vibrometer data. Journal of Sound and Vibration, 297(1-2), 420-431.
32.
Douka, E., Loutridis, S. and Trochidis, A. ( 2003). Crack identification in beams using wavelet analysis . International Journal of Solids and Structures, 40, 3557-3569.
33.
Hong, J.C., Kim, Y.Y., Lee, H.C. and Lee, Y.W. ( 2002). Damage detection using the Lipschitz exponent estimated by the wavelet transform: applications to vibration modes of a beam. International Journal of Solids and Structures, 39, 1803-1816.
34.
Amraoui, M.Y. and Lieven, N.A.J. (2004). Laser vibrometry based detection of delaminations in glass/ epoxy composites. Journal of Sound and Vibration, 126, 430-437.
35.
Sundaresan, M.J. (2003). Experimental damage detection on a wing panel using vibration deflection shapes. Structural Health Monitoring, 2(3), 243-256.
36.
Halkon, B.J. , Frizzel, S.R. and Rothberg, S.J. (2003). Vibration measurements using continuous scanning laser vibrometry: velocity sensitivity model experimental validation. Measurement Science and Technology, 14, 773-783.
37.
Vanhoenacker, K., Schoukens, J., Guillaume, P. and Vanlanduit, S. (2004). The use of multisine excitations to characterise damage in structures. Mechanical Systems and Signal Processing, 18, 43-57.
38.
Wojtowicki, J.L. and Jaouen, L. (2004). New approach for the measurements of damping properties of materials using Oberst beam. Review of Scientific Instruments, 75(8), 2569-2574.
39.
Petit, S., Bouvet, C., Bergerot, A. and Barrau, J.J. ( 2007). Impact and compression after impact experimental study of a composite laminate with a cock thermal shield. Composites Science and Technology, 67, 3286-3299.
40.
Cheraghi, N. and Riley, M.J. (2005). A novel approach for detection of damage in adhesively bonded joints in plastic pipes based on vibration method using piezoelectric sensors. In: Systems, Man and Cybernetics, IEEE International Conference, Vol. 4, pp. 3472-3478.
41.
Iglesias, A.M. (2000). Investigating various modal analysis - Extracting techniques to estimate damping ratio. Ph.D. Dissertation, Virginia Polytechnic Institute, USA.
42.
Morlier, J., Chermain, B. and Gourinat, Y. ( 2009). Original statistical approach for the reliability in modal parameters, In: Proceedings of the International Modal Analysis Conference, IMAC XXVII, Orlando, USA.
