Fracture of amorphous polymers: A gradient-damage theory

2021 ◽  
Vol 146 ◽  
pp. 104164
Author(s):  
Sooraj Narayan ◽  
Lallit Anand
Keyword(s):  
Amorphous Polymers ◽  
Damage Theory

Modelling the Packing Cooling Stage in Injection Molding of Amorphous Polymers

1988 ◽  
Vol 3 (4) ◽  
pp. 184-190 ◽  
Author(s):  
D. Huilier ◽  
J. Terrisse ◽  
M.-E. de la Lande ◽  
A. Latrobe
Keyword(s):  
Injection Molding ◽  
Amorphous Polymers ◽  
Cooling Stage

Formulation of a Strain Based Orthotropic Elasto-Plastic Damage Theory

2000 ◽  
Vol 9 (2) ◽  
pp. 174-191
Author(s):  
L. C. CHAN ◽  
T. C. LEE ◽  
J. P. FAN ◽  
C. Y. TANG
Keyword(s):  
Plastic Damage ◽  
Damage Theory

Prediction of Zero-Shear Viscosity of Linear Polybutadienes from the Crossover Point Using Doi-Edwards Theory

1988 ◽  
Vol 61 (5) ◽  
pp. 812-827 ◽  
Author(s):  
Ramesh R. Rahalkar ◽  
Henry Tang
Keyword(s):  
Shear Viscosity ◽  
Amorphous Polymers ◽  
Simple Expression ◽  
Crossover Frequency ◽  
Crossover Point ◽  
Zero Shear Viscosity ◽  
Plateau Modulus ◽  
Good Agreement

Abstract Based upon the Doi-Edwards theory, a simple expression has been obtained for zero-shear viscosity in terms of the plateau modulus and the crossover frequency. There are no adjustable parameters in the expression. The model is in very good agreement with the zero-shear viscosity values for linear polybutadienes, the typical discrepancy being ∼5–10%. If the model can be validated for other linear amorphous polymers, it may become possible to estimate the zero-shear viscosity by measuring a single Theological parameter (the crossover frequency).

Reliability Simulation and Forecast Based on Virtual Prototype for the Running System of Complicated Equipments

2014 ◽  
Vol 543-547 ◽  
pp. 195-198
Author(s):  
Li Jun Cao ◽  
Hui Bin Hu ◽  
Gui Bo Yu ◽  
Shu Hai Wang
Keyword(s):  
Probability Density ◽  
Local Stress ◽  
Virtual Prototype ◽  
Probability Density Distribution ◽  
Stress And Strain ◽  
Load Spectrum ◽  
Density Distribution Function ◽  
Running System ◽  
Maintenance Cycle ◽  
Damage Theory

The running system is the key part to finish training or battle tasks of complicated equipments. But formidable working conditions influence the measurement of load spectrums and it is difficult to analyze and forecast the reliability of running system. Actual vehicle experiments and virtual prototype are firstly combined to obtain complete load spectrum of running system. According to the materials S-N curve, stress and strain spectrums can be computed. Nominal stress method and local stress and strain method are combined with probability density accumulation damage theory to compute the probability density distribution function. Then, the reliability of running system can be forecasted, which provide adequate reference for the maintenance cycle confirmation and mission reliability prediction.

scholarly journals Modeling of competition between shear yielding and crazing in amorphous polymers’ scratch

2017 ◽  
Vol 124 ◽  
pp. 215-228 ◽  
Author(s):  
Han Jiang ◽  
Jianwei Zhang ◽  
Zhuoran Yang ◽  
Chengkai Jiang ◽  
Guozheng Kang
Keyword(s):  
Amorphous Polymers ◽  
Shear Yielding
Sign in / Sign up

Export Citation Format

Share Document