%0 Journal Article
%T Effect of fine particles on the flow behavior ofpolycrystalline ice and glaciers——(Ⅰ) a dislocationbased relaxation model<br>微粒对多晶冰及冰川流变行为的影响——(Ⅰ) 基于位错的弛豫模型
%A SONG Min
%A David MCole
%A Ian Baker
%A <br>宋旼
%A David M.Cole
%A Ian Baker
%J 地球物理学报
%D 2007
%I 
%X A dislocation-based nonlinear relaxation model has been developed to quantify the variations of dislocation density in ice and glaciers as a function of flow stress during flow processes.The calculation based on the model indicates that during the power-law creep stage,the stress/strain hysteresis loop width and area increase linearly with the creep stress,and dislocation density increases as a second-power with the creep stress;while during the linear creep stage,the stress/strain hysteresis loop width,area and dislocation density remain constant.
%K Ice and glacier
%K Dislocation
%K Relaxation
%K Flow
%K Nonlinear model<br>冰与冰川
%K 位错
%K 弛豫
%K 流变
%K 非线性模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=8DBC3D060E99B9B5&yid=A732AF04DDA03BB3&vid=771152D1ADC1C0EB&iid=CA4FD0336C81A37A&sid=6FBD78E3BAB60869&eid=B47A0E731AF43EB2&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=1&reference_num=22