Rheology elasticity determined by deformation of stretchable molecular trains
The average stretching direction, local rotation angular, and stretching ratio parameters of molecular wains were used to express the rheology deformation. Based on this micro geometrical deformation, the macro deformation of medium was expressed.Then, using intrinsic elasticity concept, the stress-strain relation was obtained. In this theoretic formulation, the response functions of extension ratio and rotation angular were used to express the theology feature of medium. For medium composed by incompressible molecular trains, the local rotation angular divides rheology deformation into three kinds: viscoelastic deformation orelasticity enhancement, viscoplastie deformation or elasticity degenerate and constant elasticity range. These results explain the experimental features of rheology deformation well.
viscoplasticity viscoelasticity local rotation angular extension ratio deformation tensor rational mechanics rheology
XIAO Jian-hua(肖建华)
Measurement Institute, Henan Polytechnic University, Jiaozuo 454000, China
国际会议
长沙
英文
9-12
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）