By integrating eeects of microscopic interactions between statisticaly self-similar fault surfaces, we succeeded in deriving a slip-and time-dependent fault constitutive law that rationally uniies the slip-dependent law and the rate-and state-dependent law (Aochi and Matsu'ura, 199881]). In this con-stitutive law the slip-weakening results from the abrasion of surface asperities that proceeds i...

We consider the dynamics of squeeze-out of a molecularly thin confined two-dimensional ~2D! liquidlike layer. The squeeze-out is described by a generalized 2D Navier–Stokes equation which is solved exactly for the limiting case where the squeeze-out nucleates at the center of the contact area, and where the ~perpendicular! three-dimensional pressure profile is Hertzian. We also present numerica...

The relation between packing geometry and force network statistics is studied for granular media. Based on simulations of two-dimensional packings of Hertzian spheres, we develop a geometrical framework relating the distribution of interparticle forces P(f) to the weight distribution P(w), which is measured in experiments. We apply this framework to reinterpret recent experimental data on stron...

OBJECTIVE To determine whether the FlatWire Figure 8 sternal fixation device (Penn United, USA) is mechanically superior to the current standard in sternotomy closure. DESCRIPTION Unstable sternal closure using traditional steel-wire cerclage can increase postoperative pain, bony cut-through and wound dehiscence. The authors present the Figure 8 sternal fixation device to minimize these compl...

This paper deals with the damage of ceramic materials after impact. The main information on the phenomenology and the kinetic damage are often localized inside the Hertzian cone crack area [I]. With a ceramic tile target, it is not possible to obtain any information during the test. Therefore a new geometry of ceramic target, called "Match was developed in order to put crack gauge inside the He...

the equations governing the motion of steel balls and their impact onto shell liners in industrial semi-autogenous grinding (sag) mills are derived in full details by the authors and are used in order to determine the effective design variables for optimizing the working conditions of the mill and to avoid severe impacts which lead to the breakage of sag mill shell liners. these design variable...

Time-of-flight measurements with point-like contact transducers have successfully been applied for the detection of anisotropy, and for in situ measurements of film thickness and temperature. The operation frequency range of the pin transducers made so far was, however, restricted at several hundreds of kHz. This paper presents a new type of Hertzian-contact transducer of waveguiding structure ...