Damping Factor of Composite Plate Using Lamb Wave Method
نویسندگان
چکیده
The article presents the methodology for finding material damping capacity at higher frequency and lower amplitudes. Lamb wave dispersion theory is used for finding the damping capacity of composite material which is used at extensively high frequency applications. The method has been implemented on carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) plates. The Lamb waves or stress waves are generated using ultrasonic pulse generator with scan view plus as virtual controller and also calibration was carried out for optimal Lamb wave generation. The method is well explored in this article and the results have been compared with other conventional methods. The results were close agreement with the other methods used in this article.
منابع مشابه
Lamb wave propagation simulation in smart composite structures
Abaqus/Standard simulation of Lamb waves in smart composite plates is investigated for detecting delamination type damage. Composite plates typical of aerospace structures are used and a PZT actuator is surface bonded to excite Lamb waves. Abaqus model of composite plate uses layered solid elements. Piezoelectric (PZT-5H) actuator is modeled using piezoelectric elements that have both displacem...
متن کاملLamb wave-based damage detection of composite shells using high-speed fiber-optic sensing
A Lamb wave-based damage identification method called damage imaging method for composite shells is presented. A damage index (DI) is generated from the delay matrix of the Lamb wave response signals, and it is used to indicate the location and approximate area of the damage. A piezoelectric actuator is employed to generate the Lamb waves that are subsequently captured by a fiber Bragg grating ...
متن کاملApplication of Wavelet Transform as a Signal Processing Method for Defect Detection using Lamb Waves: Experimental Verification
A Lamb wave-based crack detection method for aluminum plates health monitoring is developed in this paper. Piezoelectric disks are employed to actuate and capture the Lamb wave signals. The position of crack is assumed to be aligned with the sensor and actuator. Extraction of high quality experimental results of lamb wave propagation in a plate-like structure is considerably complicated due to...
متن کاملMircea Calomfirescu Lamb Waves for Structural Health Monitoring in Viscoelastic Composite Materials
Structural Health Monitoring (SHM) is a novel philosophy for an autonomous, built-in nondestructive evaluation of structural “health” on demand to reduce life-cycle costs, increase safety and reduce structural weight. This dissertation investigates ultrasonic guided waves, particularly Lamb waves, and their propagation properties as a method to perform Health Monitoring of viscoelastic composit...
متن کاملGuided wave propagation in composite laminates using piezoelectric wafer active sensors
Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive transducers that enable a large class of structural health monitoring (SHM) applications such as: (a) embedded guided wave ultrasonics, i.e., pitch-catch, pulse-echo, phased arrays; (b) high-frequency modal sensing, i.e., electro-mechanical impedance method; and (c) passive detection. The focus of this paper is on the cha...
متن کامل