Evaluation of differential constitutive equations based on stress relaxation data for polymer melts (abstract)

1991 ◽  
Vol 35 (4) ◽  
pp. 693-693
Author(s):  
Masaoki Takahashi ◽  
Kaori Taku ◽  
Toshiro Masuda
Keyword(s):  
Stress Relaxation ◽  
Constitutive Equations ◽  
Polymer Melts ◽  
Relaxation Data

Rate Dependent Constitutive Equations of Cyclic Softening

1985 ◽  
Vol 40 (7) ◽  
pp. 653-665
Author(s):  
J. S. Mshana ◽  
A. S. Krausz
Keyword(s):  
Stress Relaxation ◽  
Low Temperature ◽  
Constitutive Equations ◽  
Strain Softening ◽  
Structural Characteristics ◽  
High Stress ◽  
Cyclic Strain ◽  
Cyclic Stress ◽  
Cyclic Softening ◽  
Stress Softening

Constitutive equations of cyclic strain and stress softening for materials with low internal stress levels are derived from the rate theory. The study shows that over the high stress and low temperature range where the description of plastic flow in cyclic softening can be approximated with activation over a single energy barrier, cyclic strain softening is well related to stress relaxation process while cyclic stress softening is related to creep process. The material structural characteristics for cyclic strain softening, cyclic stress softening and stress relaxation are identical. Subsequently, it is shown that cyclic stress and strain softening within the high stress and low temperature range can be evaluated from the constitutive equations using the material structural characteristics measured from a simple stress relaxation test.

scholarly journals Dynamics and stress relaxation of bidisperse polymer melts with unentangled and moderately entangled chains

2021 ◽  
Vol 33 (6) ◽  
pp. 063105
Author(s):  
Oluseye Adeyemi ◽  
Shiping Zhu ◽  
Li Xi
Keyword(s):  
Stress Relaxation ◽  
Polymer Melts

Bulk Moduli from Physical Aging and Stress Relaxation Data

1998 ◽  
pp. 447-448
Author(s):  
J. Vernel ◽  
M. J. Kubát ◽  
R. W. Rychwalski ◽  
J. Kubat
Keyword(s):  
Stress Relaxation ◽  
Physical Aging ◽  
Relaxation Data

Constitutive equations that describe creep stress relaxation for 316H stainless steel at 550°C

2011 ◽  
Vol 28 (3) ◽  
pp. 155-164 ◽  
Author(s):  
Bo Chen ◽  
David J. Smith ◽  
Peter E.J. Flewitt ◽  
Michael W. Spindler
Keyword(s):  
Stainless Steel ◽  
Stress Relaxation ◽  
Constitutive Equations ◽  
Creep Stress
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