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1..thermal mechanism of cold drawing of polymers 2..cold drawing of polymers with rate and temperature dependent properties 3..temperature elevation in the zone of flow during cold drawing of polymers ÎÄÏ×ÌâÄ¿ÊÇÕýÈ·µÄ£¬³ö×ÔÓÚÎÄÏ×---¾ÛºÏÎïÀÉì¹ý³ÌÖо±ËõÐÐΪµÄÑо¿½øÕ¹--µÄ²Î¿¼ÎÄÏ×£¬Ð»Ð»ÁË |
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Cold drawing of polymers with rate and temperature dependent properties P. Tuǧcua and K.W. Nealea aFaculty of Applied Science, Universit¨¦ de Sherbrooke, Sherbrooke, Qu¨¦bec, Canada, J1K 2R1 Received 5 October 1989. Available online 19 February 2003. Abstract Cold drawing of polymeric fibres exhibiting rate and temperature dependent material properties is studied for steady-state loading conditions. A rigid-plastic flow theory law which incorporates both material strain-rate sensitivity and thermal softening properties is employed. The destabilizing effect of deformation-induced heating is investigated where the thermomechanical response is assumed to take place under adiabatic conditions. The interplay between the stabilizing effect of material strain-rate sensitivity and destabilizing influence of deformation-induced heating is examined through various parametric studies. |
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