Delamination Detection of Composite Beams Using Piezoelectric Sensors with Evenly Distributed Electrode Strips

In this paper, a new analytical model is presented to detect the presence, size, and location of a delamination embedded in a laminated composite beam. The sensors bonded on the top and bottom surfaces of a host beam are made from PZT piezoelectric layers. By employing this analytical model, the first three natural frequencies and sensor charge output distribution for the beams with different delamination length, axial and through-the-thickness delamination location, and delamination gap can be predicted, when a beam is excited by an external force. An approach is also proposed to obtain the sensor charge output distribution along the beam length using evenly distributed electrode strips. Subsequently, the present model is applied to a laminated plain weave composite beam with an embedded and through-width delamination, followed by an extensive numerical study. An investigation is carried out on the influence of the boundary condition, delamination length, axial delamination location, through-the-thickness delamination location, delamination gap on the first three natural frequency change and sensor charge output distribution along the beam length. The effects of number and size of electrode strips on the sensor charge output distribution is also studied. A comparison of the first three natural frequencies between the present predicted and finite element analysis results reveals that there is a good agreement between these two models.

[1]  Jd Wood,et al.  Detection of Delamination Onset in a Composite Laminate Using Moiré Interferometry , 1985 .

[2]  Croce,et al.  Modeling of propagation and echo formation in a multilayered structure , 2000, Ultrasonics.

[3]  A quasi-three-dimensional elastic wave propagation analysis for laminated composites , 1995 .

[4]  K. E. Perry,et al.  Moiré interferometry as a detailed validator for computational modelling of composites , 1998 .

[5]  Akira Todoroki,et al.  Delamination monitoring of graphite/epoxy laminated composite plate of electric resistance change method , 2002 .

[6]  G. Steven,et al.  Analysis and design of structural bonded joints , 1999 .

[7]  Francesco Aymerich,et al.  Ultrasonic evaluation of matrix damage in impacted composite laminates , 2000 .

[8]  Satya N. Atluri,et al.  Sensing and actuating behaviours of piezoelectric layers with debonding in smart beams , 2001 .

[9]  M. Z. Shah Khan,et al.  Non-destructive detection of fatigue damage in thick composites by pulse-echo ultrasonics , 2000 .

[10]  K. Perry Delamination and damage studies of composite materials using phase-shifting interferometry , 1996 .

[11]  Grant P. Steven,et al.  Modelling for predicting the mechanical properties of textile composites : A review , 1997 .

[12]  Takahiro Hayashi,et al.  Multiple reflections of Lamb waves at a delamination. , 2002, Ultrasonics.

[13]  Jaehong Lee,et al.  Free vibration analysis of delaminated composite beams , 2000 .

[14]  Gerard C. Pardoen,et al.  Effect of Delamination on the Natural Frequencies of Composite Laminates , 1989 .

[15]  Constantinos Soutis,et al.  Delamination detection in composite laminates from variations of their modal characteristics , 1999 .

[16]  H. T. Goldrein,et al.  A study of Mode-I delamination cracks by high-magnification moiré interferometry , 1998 .

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

[18]  F. Chang,et al.  Identifying Delamination in Composite Beams Using Built-In Piezoelectrics , 1995 .

[20]  Todd O. Williams,et al.  A dynamic model for laminated plates with delaminations , 1998 .

[21]  F. Hernández-Olivares,et al.  Analytical simulation of stress wave propagation in composite materials , 1999 .

[22]  Fu-Kuo Chang,et al.  Identifying Delamination in Composite Beams Using Built-In Piezoelectrics: Part I—Experiments and Analysis , 1995 .

[23]  Max Gunzburger,et al.  Vibration of delaminated composite plates and some applications to non-destructive testing , 1993 .

[24]  R. W. Martin,et al.  Delamination and crack imaging in graphite-epoxy composites , 1989 .

[25]  Y.-P. Shen,et al.  Damage-monitoring in composite laminates by piezoelectric films , 1996 .

[26]  L. Tong,et al.  Micro-electromechanics models for piezoelectric-fiber-reinforced composite materials , 2001 .

[27]  T. Kundu,et al.  Material interface inspection by lamb waves , 1997 .

[28]  C. Scarponi,et al.  Ultrasonic technique for the evaluation of delaminations on CFRP, GFRP, KFRP composite materials , 2000 .

[29]  Dimitris A. Saravanos,et al.  EFFECTS OF DELAMINATIONS ON THE DAMPED DYNAMIC CHARACTERISTICS OF COMPOSITE LAMINATES: ANALYSIS AND EXPERIMENTS , 1996 .