Equibiaxial extension of a viscoelastic partially extending strand convection model with large relaxation time
Equibiaxial extension of a viscoelastic partially extending strand convection model with large relaxation time
复制标题
大弛豫时间粘弹性部分延伸股对流模型的等双轴延伸
DOI:
10.1007/s00397-015-0853-z
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发表时间:
2015
期刊:
影响因子:
2.3
通讯作者:
Renardy, Yuriko
中科院分区:
文献类型:
--
作者:
Grant, Holly V.;Renardy, Yuriko
A combined numerical and asymptotic study is presented for a viscoelastic fluid, which behaves as a thixotropic yield stress fluid in the limit of large relaxation time. Homogeneous biaxial extension under a prescribed stress is addressed. The constitutive model is a viscoelastic partially extending strand convection model for the microstructure embedded in a Newtonian solvent. There are two important parameters: the ratio of yield stress to stress modulus and the ratio of retardation to relaxation times. The transient change that takes place if a configuration is stressed biaxially is investigated. Distinct asymptotic regimes are identified and governed by fast and slow time scales. Steady flow curves may be monotone or non-monotone, depending on the ratio of yield stress to stress modulus. In either case, a slow evolution of the apparent viscosity is found upon cessation of the applied stress. A regime where steady solutions exhibit extensional thickening in uniaxial extension, but not in biaxial extension, is consistent with prior observations. The von Mises criterion, which relates yield stresses in extension and shear, is retrieved for the special case of immediate yielding at low strain.
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影响因子:
3.1
作者:
N. Germann;L. Cook;A. Beris
通讯作者:
N. Germann;L. Cook;A. Beris
影响因子:
3.3
作者:
R. Larson
通讯作者:
R. Larson
影响因子:
2.3
作者:
Denn, Morton M.;Bonn, Daniel
通讯作者:
Bonn, Daniel
影响因子:
3.1
作者:
K. Maki;Y. Renardy
通讯作者:
Y. Renardy
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
M. S. Turner;M. Cates
通讯作者:
M. Cates