13th International Conference on Fracture June 16–21, 2013, Beijing, China -7- Fig. 5 Predicted experimental melting process of a system of an Ag nanowire mesh equipped with current source (CCCS: current-controlled current source; VCCS: voltage-controlled current source) To explain this unique melting behavior of a mesh structure, the melting of an individual nanowire is discussed here to make comparison. The maximum temperature induced by Joule heating in the nanowire increases with increasing current. When the maximum temperature reaches to the melting point of the material, the nanowire will melt, and the melting process of an individual wire is finished. For the mesh structure, on the other hand, the maximum temperature in the mesh, occurring in some place of a mesh segment, initially increases with the increasing current, which is similar with that of the individual nanowire. When the maximum temperature reaches to the melting point of the material, the corresponding mesh segment melts. However, this is just the start point of melting in the mesh structure, and the mesh structure intrinsically takes a consecutive melting
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