Lykotrafitis, G. and Rosakis, A. J. and Ravichandran, G. (2006) Particle Velocimetry and Photoelasticity Applied to the Study of Dynamic Sliding Along Frictionally-Held Bimaterial Interfaces: Techniques and Feasibility. Experimental Mechanics, 46 (2). pp. 205-216. ISSN 0014-4851 http://resolver.caltech.edu/CaltechAUTHORS:20110714-084450267
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A laser interferometry-based technique was developed to locally measure the in-plane components of particle velocity in dynamic experiments. This technique was applied in the experimental investigation of dynamic sliding along the incoherent (frictional) interface of a Homalite–steel bimaterial structure. The bimaterial specimen was subjected to uniform compressive stress and impact-induced shear loading. The evolution of the dynamic stress field was recorded by high-speed photography in conjunction with dynamic photoelasticity. The combination of the full-field technique of photoelasticity with the local technique of velocimetry was proven to be a very powerful tool in the investigation of dynamic sliding. A relatively broad loading wave with an eye-like structure emanated from the interface. The particle velocity measurements established that sliding started behind the eye-like fringe pattern. It propagated with supershear speed with respect to Homalite. A shear Mach line originating from the sliding tip is visible in the photoelastic images. A vertical particle velocity measurement revealed the existence of a wrinkle-like pulse traveling along the bimaterial interface. The wrinkle-like pulse followed the initial shear rupture tip and propagated at a specific subshear speed.
|Additional Information:||© 2006 Society for Experimental Mechanics. Received: 3 August 2005; Accepted: 21 November 2005. The authors gratefully acknowledge the support of the Office of Naval Research through grant N00014-03-1-0435 (Dr. Y.D.S. Rajapakse, Program Manager). The authors would also like to thank "Polytec", USA, (M. Pineda and E. Lawrence), for the use of the second velocimeter.|
|Subject Keywords:||dynamic frictional sliding; incoherent interface; bimaterial system; photoelasticity; in-plane velocity measurement; supershear rupture; subshear wrinkle-like pulse|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||14 Oct 2011 15:59|
|Last Modified:||14 Oct 2011 15:59|
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