POINT OF IMPACT PREDICTION IN ANISOTROPIC FIBER REINFORCED COMPOSITE PLATES FROM THE ACOUSTIC EMISSION DATA

2008 ◽  
Author(s):  
T. Kundu ◽  
S. Das ◽  
K. V. Jata ◽  
Donald O. Thompson ◽  
Dale E. Chimenti
Keyword(s):  
Acoustic Emission ◽  
Composite Plates ◽  
Fiber Reinforced ◽  
Emission Data ◽  
Fiber Reinforced Composite ◽  
Impact Prediction ◽  
Reinforced Composite ◽  
Anisotropic Fiber

Locating point of impact in anisotropic fiber reinforced composite plates

Ultrasonics ◽  
2008 ◽  
Vol 48 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Tribikram Kundu ◽  
Samik Das ◽  
Steven A. Martin ◽  
Kumar V. Jata
Keyword(s):  
Composite Plates ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Anisotropic Fiber

The Failure of Carbon Fiber Reinforced Composite Analyzed by Acoustic Emission

2020 ◽  
Vol 405 ◽  
pp. 205-211
Author(s):  
Vladimír Mára ◽  
Jan Krčil ◽  
Lenka Michalcová ◽  
Elena Čižmárová
Keyword(s):  
Acoustic Emission ◽  
Carbon Fiber ◽  
Mechanical Test ◽  
Metallographic Analysis ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Damage And Failure ◽  
Reinforced Composite ◽  
Carbon Fiber Reinforced ◽  
Damage Processes

This paper focus on evaluation of behavior, damage and failure processes occurring during the loading cycles in the carbon fiber reinforced composite by acoustic emission method. Since acoustic emission is physical phenomenon that detects the released energy in form of waves spreading through the material due to stimulation of material by external or internal stress, it is possible to evaluate complex damage and failure processes. For that purpose, the standard and open holes tensile testing specimens with different number of plies were manufactured. Selected acoustic emission parameters were correlated with data obtained from mechanical test. Linear localization method together with signal analysis using Fast Fourier transform algorithm were used as another tool for detection and evaluation of spreading damage processes inside the composite during the load. Basic damage types inside the composite material were identified by metallographic analysis using light microscopy. More complex damage processes were observed on the fracture surface using stereomicroscopy and scanning electron microscopy.

Investigation of the thermal anisotropy of unidirectional carbon fiber reinforced composite plates using optically generated thermal waves and a noncontact optical detection technique

1993 ◽  
Vol 8 (12) ◽  
pp. 3106-3110 ◽  
Author(s):  
W. Lauriks ◽  
C. Desmet ◽  
C. Glorieux ◽  
J. Thoen
Keyword(s):  
Carbon Fiber ◽  
Optical Detection ◽  
Composite Plates ◽  
Detection Technique ◽  
Fiber Direction ◽  
Thermal Waves ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Carbon Fiber Reinforced

Optically generated thermal waves have been used to measure the thermal diffusivity of a unidirectional carbon fiber reinforced composite plate (CFRC) both parallel and perpendicular to the fiber direction. The optically generated thermal waves have been used in combination with a noncontact optical detection technique. The diffusivity perpendicular to the fiber direction can also be determined by attaching a pyroelectric detector to the back of the sample. The value obtained this way agrees well with the results from the optical detection technique. An anisotropy factor of about 18 has been measured for a unidirectional CFRC, which agrees well with literature values obtained with completely different techniques.

Eigen Value Analysis of Glass Fiber Reinforced Composite Plate

2012 ◽  
Vol 488-489 ◽  
pp. 676-680
Author(s):  
Pramod Kumar ◽  
S.K. Tiwari
Keyword(s):  
Finite Element ◽  
Frequency Response ◽  
Composite Plate ◽  
Composite Plates ◽  
Laminated Plates ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Advanced Composite ◽  
Reinforced Composite ◽  
Quadrilateral Finite Element

Finite element analysis has been used to find out eigen values and mode shape for fiber reinforced composite plates. FRC plates are important structural elements in modern engineering structures. Vibrations of laminated composite plates have been the subject of significant research activities in recent years. Last two decades have witnessed continued development of advanced composite and other high performance aerospace materials with increased specific strength and modulus, longer fatigue life, higher combat survivability etc. Advanced composite laminates extend the possibility of optimal design through the variation of stacking sequence and fiber orientation, known as composite tailoring. The benefits that accrue from this are not attainable without solving the complexities that are introduced by various coupling effects, such as bending–stretching and bending-twisting. Even, as the matrix material is of relatively low shearing stiffness as compared to the fibers, a reliable prediction of frequency response of laminated plates must account for transverse shear deformation. A four noded quadrilateral finite element is considered for the study of frequency response of composite plate. An analytical solution to the boundary value problem of free vibration response of arbitrarily laminated plates subjected to an admissible boundary condition is presented. A rectangular fiber reinforced composite plate is modeled in FEM software (NISA 15) and natural frequencies, mode shapes are obtained and are compared with the available analytical solutions.

Microwave excitation of ultrasound in graphite–fiber reinforced composite plates

Ultrasonics ◽  
2003 ◽  
Vol 41 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Emmanuel Guilliorit ◽  
Bernard Hosten ◽  
Christophe Bacon ◽  
D.E. Chimenti
Keyword(s):  
Composite Plates ◽  
Graphite Fiber ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Microwave Excitation
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