Rate‐dependent nonlinear constitutive equation of polypropylene
作者:
Masayoshi Kitagawa,
Tatsuya Mori,
Tomohiko Matsutani,
期刊:
Journal of Polymer Science Part B: Polymer Physics
(WILEY Available online 1989)
卷期:
Volume 27,
issue 1
页码: 85-95
ISSN:0887-6266
年代: 1989
DOI:10.1002/polb.1989.090270106
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractIn order to investigate the viscoelastic‐plastic properties of polymer solids and construct a constitutive equation for them, torsional tests were performed on polypropylene (PP) hollow cylinders. Testing was conducted under constant strain rate, abrupt change of strain rate, stress relaxation, creep, and cyclic loading conditions. The experimental data were compared with the numerical results derived from an overstress model. It is shown that the overstress theory explains the viscoelastic‐plastic properties of PP well, provided that the current strain is not below the maximum previous str
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