Coating thickness and elastic modulus measurement using ultrasonic bulk wave resonance

Coating thickness and elastic modulus measurement using ultrasonic bulk wave resonance

Ac 2007-2340: Elastic Modulus of Bone Using Ultrasonic Testing

Lanny Griffin, California Polytechnic State University Lanny Griffin received his Ph.D. from the University ofCalifomia at Davis in Materials Science and Engineering. He also has a BS degree in Mechanical Engineering from Califomia Polytechnic State University in San Luis Obispo. Cunently, he is a Professor ofBiomedical Engineering at Califomia Polytechnic State University in San Luis Obispo. H...

Measurement of Thermoplastic Dynamic Modulus using an Ultrasonic Welding System

This paper reports the preliminary results of a newly developed method for measuring dynamic modulus of thermoplastic materials at a given ultrasonic frequency. In the method, a material specimen is squeezed at the tip of the horn of a conventional ultrasonic welding machine. The mechanical impedance of the material specimen under loading is then deduced by processing the input electrical imped...

Measurement of Thickness and Elastic Properties of Electroactive Polymer Films Using Plate Wave Dispersion Data

Elec:troactive thin-film polymers a.re increa.sinp;ly beinp; used as sensors and actuators in aerospace structures [1,2]. They also have sip;nificant potential for applications in musc:le mechanisms and micro-electro-mechanical systems (MEMS). In these applications, polymer films of thickness varyinp; between 20 and :100 tLin are utilized. Actuation of these polymers is attributed to piezoelect...

PHASE CORRECTION FOR ULTRASONIC BULK WAVE MEASUREMENTS OF ELASTIC CONSTANTS IN ANISOTROPie

When an ultrasonic wave is incident on a water/solid interface generally three waves are excited in the solid: one longitudinal and two shear. The complex amplitudes of the transmitted waves depend on the material properties and the angle of incidence. At incident angles higher than the first critical angle an evanescent longitudinal wave is excited near the surface. To satisfy the boundary con...