Tensile stress overshoot in uniaxial extension of a LDPE melt

1979 ◽  
Vol 18 (3) ◽  
pp. 427-428 ◽  
Author(s):  
M. H. Wagner ◽  
T. Raible ◽  
J. Meissner
Keyword(s):  
Tensile Stress ◽  
Uniaxial Extension ◽  
Stress Overshoot ◽  
Ldpe Melt

Characterisation of an Industrial Polymer Melt Through Either Uniaxial Extension or Exponential Shear Data: An Application of the Pom-Pom Model

2003 ◽  
Vol 13 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Suneel ◽  
Richard S. Graham ◽  
Tom C.B. McLeish
Keyword(s):  
Strain Hardening ◽  
Simple Shear ◽  
Linear Response ◽  
Polymer Melts ◽  
Molecular Model ◽  
Uniaxial Extension ◽  
Polymer Melt ◽  
Non Linear ◽  
Ldpe Melt ◽  
Made In

Abstract We present new non-linear data in extension and two different shear histories. These data are used to compare the effectiveness of using exponential shear data and uniaxial extension data to characterise the non-linear response of an industrial LDPE melt with the pom-pom molecular model. We conclude that extension and exponential shear both allow good predictions to be made in simple shear. However, the characterisation spectrum obtained from exponential shear data fails to predict the correct degree of strain hardening at low extension rates. From this study we are able to suggest circumstances under which exponential shear provides a useful characterisation of branched polymer melts.

Effects of Two Scaling Exponents on Swelling-Induced Softening of Elastomers under Equibiaxial and Planar Extensions

2016 ◽  
Vol 725 ◽  
pp. 427-432 ◽  
Author(s):  
Dai Okumura ◽  
Masahiro Mizutani
Keyword(s):  
Mechanical Properties ◽  
Free Energy ◽  
Tensile Stress ◽  
Energy Function ◽  
Strain Softening ◽  
Uniaxial Extension ◽  
Free Energy Function ◽  
Scaling Exponents ◽  
Lateral Direction ◽  
Study Results

We study the effects of two scaling exponents on the mechanical properties of swollen elastomers under equibiaxial and planar extensions. Two scaling exponents are introduced to extend the Flory-Rehner free energy function, and are adjusted based on the previous study. Results show that swelling-induced strain softening is apt to occur under equibiaxial extension compared to uniaxial extension. The additional tensile stress in a lateral direction enables it to occur in relatively poor solvents, and accelerates the onset point. Planar extension shows more complicated responses because the stress in the constrained direction changes dramatically depending on the combination of two scaling exponents and the Flory-Huggins interaction parameter.

Failure of the Asphalt–Aggregate Interface under Tensile Stress: Insight from Molecular Dynamics

2021 ◽  
Vol 33 (3) ◽  
pp. 04021008
Author(s):  
Zhao Du ◽  
Xingyi Zhu ◽  
Feng Li ◽  
Siqi Zhou ◽  
Ziwei Dai
Keyword(s):  
Molecular Dynamics ◽  
Tensile Stress

Evolution of plasticity zones in vicinity of pores in steels under stress corrosion conditions

2020 ◽  
pp. 130-136
Author(s):  
A.N. Chukanov ◽  
V.A. Tereshin ◽  
A.E. Gvozdev ◽  
A.A. Shatul’sky ◽  
A.P. Navoev ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Stress Corrosion ◽  
Structural Steels ◽  
Gas Pressure

Method for determining of the coordinates of the plasticity zones boundaries formed in the vicinity of pores under loading of cast and powder structural steels in contact with aggressive media is proposed. The effect of external tensile stress and gas pressure in pores is taken into account.

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