摘要:

The theories of continuum mechanics and molecular physics are brought together to provide constitutive relations for dilute polymer solutions. The required compatibility shows that the stress tensor is composed of a sum of stress tensors, each satisfying Oldroyd's differential constitutive equation. In each equation, the higher order strain rate terms are not retained, and the five material constants are found solely by utilizing results from Rouse's molecular theory. When the fluid acceleration is small, it is shown that the set of constitutive relations may be approximated by a single equation of the Oldroyd type, containing only two material constants.

ISSN:0148-6055    

DOI:10.1122/1.549252

出版商:The Society of Rheology    

年代:1972

数据来源: AIP

摘要:

A linearized error analysis is performed of the forced vibrating reed test. The test variables measured are amplitude ratio, phase lag, and frequency in addition to geometric variables. Utilizing the perturbations of the complex modulus resulting from perturbations of the measured quantities enables the experimenter to design effective tests for maximum utilization of test equipment.

ISSN:0148-6055    

DOI:10.1122/1.549253

出版商:The Society of Rheology    

年代:1972

数据来源: AIP