Transverse Cracking in a Cross-ply Composite Laminate - Detection in Acoustic Emission and Source Characterization

Transverse cracking detection in a uniaxially loaded symmetric cross-ply hybrid composite laminate is studied using modal-based acoustic emission (MAE) method. Transverse cracking in the hybrid laminate is identified in conjunction with the finite element analysis and acoustic emission (AE) testing on unidirectional carbon/epoxy specimens. Higher wave modes are involved in various damage events in both types of specimens. Wave attenuation in the hybrid laminate is observed to be much stronger than in the unidirectional carbon/epoxy specimen, resulting in fewer AE events detected. A material failure kinetics-based characterization of the transverse cracking process is proposed. Results of dynamic response analysis of the hybrid laminate show good agreement with the AE experiment data.

[1]  N. Choi,et al.  Detection of microfracture processes in composite laminates by thermo-acoustic emission , 2003 .

[2]  S. L. Phoenix,et al.  A statistical model for the time dependent failure of unidirectional composite materials under local elastic load-sharing among fibers , 1983 .

[3]  F. Erdogan,et al.  Fracture mechanics of orthotropic laminated plates—II. The plane strain crack problem for two bonded orthotropic layers , 1993 .

[4]  John M. Hodgkinson,et al.  Mechanical testing of advanced fibre composites , 2000 .

[5]  Martine Wevers,et al.  Modal analysis of acoustic emission signals from CFRP laminates , 1999 .

[6]  Zvi Hashin,et al.  Analysis of cracked laminates: a variational approach , 1985 .

[7]  Ajit K. Mal,et al.  Elastic waves from localized sources in composite laminates , 2002 .

[8]  M. Wevers,et al.  Transverse cracking and Poisson's ratio reduction in cross-ply carbon fibre-reinforced polymers , 1999 .

[9]  M. Gorman.  Plate wave acoustic emission , 1991 .

[10]  Peter Gudmundson,et al.  Broad-band transient recording and characterization of acoustic emission events in composite laminates , 2000 .

[11]  M. Gorman,et al.  Source location in thin plates using cross-correlation , 1991 .

[12]  M. Gorman,et al.  Ultrasonic Polar Backscatter Imaging of Transverse Matrix Cracks , 1991 .

[13]  N. Takeda,et al.  Effect of transverse cracks on lamb wave velocity in CFRP cross-ply laminates , 2002 .

[14]  Peter J. de Groot,et al.  Real-time frequency determination of acoustic emission for different fracture mechanisms in carbon/epoxy composites , 1995 .

[15]  Vinay Dayal,et al.  Leaky Lamb waves in an anisotropic plate. II: Nondestructive evaluation of matrix cracks in fiber-reinforced composites , 1991 .

[16]  Martine Wevers,et al.  Acoustic emission to model the fatigue behaviour of quasi-isotropic carbon-epoxy laminate composites , 1999 .

[17]  M. Gorman,et al.  Time-dependent Microcracking Detected in a Rubber-toughened Carbon-epoxy Composite by the Modal Acoustic Emission Method , 2003 .

[18]  Bernard D. Coleman,et al.  Statistics and Time Dependence of Mechanical Breakdown in Fibers , 1958 .

[19]  Thomas J. R. Hughes,et al.  Improved numerical dissipation for time integration algorithms in structural dynamics , 1977 .

[20]  Isaac M Daniel,et al.  Progressive Transverse Cracking of Crossply Composite Laminates , 1990 .

[21]  Michele Giordano,et al.  Acoustic emission wave propagation in a viscoelastic plate , 1999 .

[22]  J. S. Mills,et al.  Thermal Microcracking in Celion 6000/PMR-15 Graphite/Polyimide , 1980 .

[23]  Jie Qian,et al.  Hybrid transient-parametric AE analysis of histories of damage micromechanisms in composites , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[24]  M. Wevers,et al.  Acoustic Emission from CFRP Laminates during Fatigue Loading , 1998 .

[25]  S. Lih,et al.  Elastodynamic Response of a Unidirectional Composite Laminate to Concentrated Surface Loads: Part II , 1992 .

[26]  M. Åberg,et al.  Numerical modeling of acoustic emission in laminated tensile test specimens , 2001 .

[27]  N. Toyama,et al.  Lamb wave evaluation and localization of transverse cracks in cross-ply laminates , 2003 .

[28]  Laurence J. Jacobs,et al.  Modeling elastic wave propagation in waveguides with the finite element method , 1999 .

[29]  Jürgen Bohse,et al.  Acoustic emission characteristics of micro-failure processes in polymer blends and composites , 2000 .

[30]  A. Rotem,et al.  Determining the load-time history of fibre composite materials by acoustic emission , 1974 .

[31]  Mikael Johnson,et al.  Classification of AE transients based on numerical simulations of composite laminates , 2003 .

[32]  William H. Prosser,et al.  Plate Mode Velocities in Graphite/Epoxy Plates , 1996 .

[33]  S. M. Ziola,et al.  Plate waves produced by transverse matrix cracking , 1991 .

[34]  Peter Gudmundson,et al.  Micromechanical modeling of transient waves from matrix cracking and fiber fracture in laminated beams , 2000 .

[35]  K E Jackson,et al.  Advanced waveform-based acoustic emission detection of matrix cracking in composites , 1995 .

[36]  F. Erdogan,et al.  Fracture problems in composite materials , 1972 .

[37]  Yoshihiro Mizutani,et al.  Fracture mechanism characterization of cross-ply carbon-fiber composites using acoustic emission analysis , 2000 .

[38]  R. Brooks,et al.  Characterization of transverse failure in composites using acoustic emission , 1998 .

[39]  Ramesh Talreja,et al.  Transverse Cracking and Stiffness Reduction in Composite Laminates , 1985 .

[40]  D. Kaloedes,et al.  Transverse cracking of fibre bundle composites studied by acoustic emission and Weibull statistics—effects of postcuring and surface treatment , 1999 .

[41]  J. Berthelot,et al.  Modelling the transverse cracking in cross-ply laminates: application to fatigue , 1999 .

[42]  H. Eyring.  Viscosity, Plasticity, and Diffusion as Examples of Absolute Reaction Rates , 1936 .