Title :
Material property characterization and pulse propagation in thin drawn wire waveguides
Author :
Madaras, E.I. ; Kohl, T. ; Rogers, W.P.
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
Abstract :
The material properties of thin drawn wire waveguides (304 stainless steel and hard tempered aluminium 1100 with diameters ranging from 127 to 406 μm) are characterized experimentally, and axially symmetric elastic wave pulse propagation is modeled analytically. The drawn wires are found to behave as transversely isotropic media. Dispersion measurements are used to accurately determine two of the five independent material properties in several metal wire samples: better than 0.5% for ELL (longitudinal Young´s modules), and better than 5% for VLT (longitudinal-transverse Poisson´s ratio). The value of GLT (longitudinal-transverse shear modulus) is determined through measurement of the first torsional mode. The dispersive pulsed waveforms may be accurately predicted from the model
Keywords :
Poisson ratio; Young´s modulus; acoustic waveguides; aluminium alloys; austenitic stainless steel; elastic moduli measurement; iron alloys; shear modulus; ultrasonic dispersion; ultrasonic materials testing; ultrasonic propagation; 127 to 406 micron; 304 stainless steel; Al-Fe alloy; axially symmetric elastic wave pulse propagation; dispersive pulsed waveforms; first torsional mode; hard tempered 1100 alloy; material properties; model; phase spectral analysis; thin drawn wire waveguides; transversely isotropic media; Acoustic waveguides; Aluminum; Dispersion; Frequency; Material properties; NASA; Steel; Transducers; Ultrasonic variables measurement; Wire drawing;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.275819
