Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Geophysics》 2007-01
Add to Favorite Get Latest Update

Effect of fine particles on the flow behavior of polycrystalline ice and glaciers——(Ⅰ) a dislocation-based relaxation model

SONG Min~1,David M.Cole~2,Ian Baker~31 State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China2 US Army Cold Regions Research and Engineering Laboratory,Hanover NH 03755,U.S.A.3 Thayer School of Engineering,Dartmouth College,Hanover NH 03755,U.S.A.  
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.
【Fund】: 美国国家科学基金(National Science Foundation)极地科学研究部(OPP011737)资助
【CateGory Index】: P343.6
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved