Flow Through a Lens-Shaped Duct
The flow through a symmetric, lens-shaped duct is solved by accurate Ritz and perturbation methods. The flow rate (resistance) is found for various thickness ratios. The flow rate is much better than ...
The flow through a symmetric, lens-shaped duct is solved by accurate Ritz and perturbation methods. The flow rate (resistance) is found for various thickness ratios. The flow rate is much better than ...
A Comparison of Coulomb Friction and Friction Stress Models Based on Multidimensional Nanocontact Experiments
J. Appl. Mech. -- May 2008 -- Volume 75, Issue 3, 034504 (3 pages)
doi:10.1115/1.2871022
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The accuracy of the Oliver–Pharr approach for nanoindentation experiments critically depends on the interfacial friction condition. Although Coulomb friction is often used in finite element simulations for the correction, the friction stress model may give a more appropriate physical scenario. The measurement of the tangential contact stiffness by a recently developed multidimensional nanocontact system provides a direct verification of these two friction models. Both friction models will predict the tangential stiffness reduction as the consequence of interface microslip, but quantitative comparison to the experiments supports the friction stress model.
©2008 American Society of Mechanical Engineers
| History: | Received 17 April 2007; revised 18 December 2007; published 5 May 2008 | |
| doi: | http://dx.doi.org/10.1115/1.2871022 | |
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