Computers

  2010 JUN 17 - (VerticalNews.com) -- "This paper builds on the flexibility of the level-set representation to model in a unified manner the expansion of a hollow in the ground under different physical phenomena. In particular, the dissolving action of a flow of water in a saturated soil, and that of a jet of particles of water in a non-saturated one, are represented in a common framework," scientists writing in the journal Computational Mechanics report ...read more

  2010 JUN 17 - (VerticalNews.com) -- "This paper describes computational analysis of the thermal ratcheting of solder-bonded layered plates subjected to cyclic thermal loading following solder-bonding. Finite element computations of Si/solder/Cu layered plates are performed by taking into account mechanical ratcheting of the copper as well as temperature-dependent creep of the solder," researchers in Nagoya, Japan report.

  "A sophisticated non-linear kinematic hardening model is used for appropriately representing mechanical ratcheting of the copper; a temperature-dependent power-law creep model is assumed for the solder. It is shown that the layered plates can exhibit either the cyclic recovery or the cyclic growth of deflection depending on the extent of plastic yielding in the copper layer, and that the cyclic recovery always occurs if the copper layer is elastic," wrote K. Nakane and colleagues, Nagoya University ...read more

  2010 JUN 17 - (VerticalNews.com) -- "Recently, stable meshfree methods for computational fluid mechanics have attracted rising interest. So far such methods mostly resort to similar strategies as already used for stabilized finite element formulations," investigators in Garching, Germany report.

  "In this study, we introduce an information theoretical interpretation of Petrov-Galerkin methods and Green's functions. As a consequence of such an interpretation, we establish a new class of methods, the so-called information flux methods. These schemes may not be considered as stabilized methods, but rather as methods which are stable by their very nature," wrote C.J. Cyron and colleagues, Technical University of Munich ...read more