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Journal Cover Journal of Applied Mechanics
  [SJR: 0.63]   [H-I: 73]   [141 followers]  Follow
    
   Full-text available via subscription Subscription journal
   ISSN (Print) 0021-8936 - ISSN (Online) 1528-9036
   Published by ASME International Homepage  [25 journals]
  • Friction Effects on the Edge-of-Contact Stresses for Sliding Contact
           Between a Flat Punch With Rounded Corners and a Half Space
    • Authors: Sinclair GB.
      Abstract: For the title problem, the punch is assumed to be pressed vertically into the horizontal upper surface of the half space, then slide horizontally sideways. A range of such configurations is identified that permit Shtaerman’s solution for the contact pressure for a rigid frictionless punch to be modified so that it applies to a deformable punch and also yields the contact stresses when the punch slides in the presence of friction. Closed-form expressions are obtained for the peak edge-of-contact stresses. These edge-of-contact stresses can fluctuate significantly with even modest amounts of sliding.
      PubDate: Wed, 04 Oct 2017 00:00:00 GMT
       
  • Thermal Fluctuations as a Computational Microscope for Studying
           Crystalline Interfaces: A Mechanistic Perspective
    • Authors: Chen D; Kulkarni Y.
      Abstract: Interfaces such as grain boundaries are ubiquitous in crystalline materials and have provided a fertile area of research over decades. Their importance stems from the numerous critical phenomena associated with them, such as grain boundary sliding, migration, and interaction with other defects, that govern the mechanical properties of materials. Although these crystalline interfaces exhibit small out-of-plane fluctuations, statistical thermodynamics of membranes has been effectively used to extract relevant physical quantities such as the interface free energy, grain boundary stiffness, and interfacial mobility. In this perspective, we advance the viewpoint that thermal fluctuations of crystalline interfaces can serve as a computational microscope for gaining insights into the thermodynamic and kinetic properties of grain boundaries and present a rich source of future study.
      PubDate: Fri, 22 Sep 2017 00:00:00 GMT
       
 
 
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