title: Nondestructive evaluation of explosively welded clad rods by resonance acoustic spectroscopy.
abstract: A resonance acoustic spectroscopy technique is assessed for nondestructive evaluation of explosively welded clad rods. Each rod is modeled as a two-layered cylinder with a spring-mass system to represent a thin interfacial layer containing the weld. A range of interfacial profiles is generated in a set of experimental samples by varying the speed of the explosion that drives the copper cladding into the aluminum core. Excellent agreement is achieved between measured and calculated values of the resonant frequencies of the system, through appropriate adjustment of the interfacial mass and spring constants used in the wave scattering calculations. Destructive analysis of the interface in the experimental specimens confirms that key features of the interfacial profile may be inferred from resonance acoustic spectroscopy analysis applied to ultrasonic measurements.
authors.affiliation: Department of Mechanical and Industrial Engineering, University of Toronto, 5 Kings College Road, Toronto, Ontario, Canada M5S 3G8.
authors.forename: Y
authors.initials: Y
authors.lastname: Fan
authors.forename: B
authors.initials: B
authors.lastname: Tysoe
authors.forename: J
authors.initials: J
authors.lastname: Sim
authors.forename: K
authors.initials: K
authors.lastname: Mirkhani
authors.forename: A N
authors.initials: AN
authors.lastname: Sinclair
authors.forename: F
authors.initials: F
authors.lastname: Honarvar
authors.forename: Harry
authors.initials: H
authors.lastname: Sildva
authors.forename: Alexander
authors.initials: A
authors.lastname: Szecket
authors.forename: Roy
authors.initials: R
authors.lastname: Hardwick
mesh_terms: D000162:Acoustics; D000535:Aluminum; D003300:Copper; D008422:Materials Testing; D008962:Models, Theoretical; D013057:Spectrum Analysis / Q000379:methods*; D014465:Ultrasonics; D014896:Welding
chemical_list: D003300:Copper; D000535:Aluminum