By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Fracture Research. According to news reporting from Cambridge, United Kingdom, by VerticalNews journalists, research stated, "The relative potency of common toughening mechanisms is explored for layered solids and particulate solids, with an emphasis on crack multiplication and plasticity. First, the enhancement in toughness due to a parallel array of cracks in an elastic solid is explored, and the stability of co-operative cracking is quantified."
The news correspondents obtained a quote from the research from the University of Cambridge, "Second, the degree of synergistic toughening is determined for combined crack penetration and crack kinking at the tip of a macroscopic, mode I crack; specifically, the asymptotic problem of self-similar crack advance (penetration mode) versus symmetric kinking is considered for an isotropic, homogeneous solid with weak interfaces. Each interface is treated as a cohesive zone of finite strength and toughness. Third, the degree of toughening associated with crack multiplication is assessed for a particulate solid comprising isotropic elastic grains of hexagonal shape, bonded by cohesive zones of finite strength and toughness. The study concludes with the prediction of R-curves for a mode I crack in a multi-layer stack of elastic and elastic-plastic solids. A detailed comparison of the potency of the above mechanisms and their practical application are given. In broad terms, crack tip kinking can be highly potent, whereas multiple cracking is difficult to activate under quasi-static conditions."
According to the news reporters, the research concluded: "Plastic dissipation can give a significant toughening in multi-layers especially at the nanoscale."
For more information on this research see: An analysis of competing toughening mechanisms in layered and particulate solids. International Journal of Fracture, 2013;183(2):241-258. International Journal of Fracture can be contacted at: Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands. (Springer - www.springer.com; International Journal of Fracture - www.springerlink.com/content/0376-9429/)
Our news journalists report that additional information may be obtained by contacting G. Noselli, University of Cambridge, Dept. of Engn, Cambridge CB2 1PZ, United Kingdom. Additional authors for this research include V.S. Deshpande and N.A. Fleck.
Keywords for this news article include: Europe, Cambridge, United Kingdom, Fracture Research
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