SOLITON-LIKE BEHAVIOR OF A MOVING DISLOCATION GROUP

被引:10
作者
PAWELEK, A [1 ]
KORBEL, A [1 ]
机构
[1] STANISLAW STASZIC UNIV MIN & MET, INST MET WORKING & PHYS MET, PL-30059 KRAKOW, POLAND
来源
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1990年 / 61卷 / 05期
关键词
D O I
10.1080/13642819008207564
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A new interpretation is presented of the results of numerical calculations of the dynamical behaviour of a dislocation group moving either freely or in dynamic pile-up formation. Both ‘relativistic’ and internal-stress softening effects are additionally taken into account. It is shown that the behaviour of a dislocation group can be considered in two representations, namely the propagation of dislocation density and shear-stress distributions, both strongly reminiscent of solitary-wave-like processes. Moreover, by considering the dynamic pile-up as the formation of a high-amplitude shear-stress impulse (called by us the ‘plaston’), it is suggested that plaston formation is a result of the interaction of a soliton-like process with an obstacle. This suggestion is discussed briefly in the context of experimental data on shear band propagation in polycrystalline metals. © 1990 Taylor & Francis Ltd.
引用
收藏
页码:829 / 842
页数:14
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