Constitutive modeling of polycarbonate over a wide range of strain rates and temperatures

2016 ◽  
Vol 21 (1) ◽  
pp. 97-117 ◽  
Author(s):  
Haitao Wang ◽  
Huamin Zhou ◽  
Zhigao Huang ◽  
Yun Zhang ◽  
Xiaoxuan Zhao
Keyword(s):  
Constitutive Modeling ◽  
Strain Rates ◽  
Wide Range

High Strain-Rate Compressive Behavior and Constitutive Modeling of Selected Polymers Using Modified Ramberg-Osgood Equation

2014 ◽  
Vol 566 ◽  
pp. 80-85
Author(s):  
Kenji Nakai ◽  
Takashi Yokoyama
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Compressive Stress ◽  
Constitutive Modeling ◽  
High Strain ◽  
Strain Rates ◽  
Stress Strain ◽  
Strain Behavior ◽  
Least Squares Fit ◽  
Wide Range

The present paper is concerned with constitutive modeling of the compressive stress-strain behavior of selected polymers at strain rates from 10-3 to 103/s using a modified Ramberg-Osgood equation. High strain-rate compressive stress-strain curves up to strains of nearly 0.08 for four different commercially available extruded polymers were determined on the standard split Hopkinson pressure bar (SHPB). The low and intermediate strain-rate compressive stress-strain relations were measured in an Instron testing machine. Six parameters in the modified Ramberg-Osgood equation were determined by fitting to the experimental stress-strain data using a least-squares fit. It was shown that the monotonic compressive stress-strain behavior over a wide range of strain rates can successfully be described by the modified Ramberg-Osgood constitutive model. The limitations of the model were discussed.

Constitutive modeling of Ti-6Al-4V at a wide range of temperatures and strain rates

2017 ◽  
Vol 63 ◽  
pp. 128-135 ◽  
Author(s):  
A. Tabei ◽  
F.H. Abed ◽  
G.Z. Voyiadjis ◽  
H. Garmestani
Keyword(s):  
Constitutive Modeling ◽  
Strain Rates ◽  
Wide Range

Constitutive Modeling of Metals Based on the Evolution of the Strain-Hardening Rate

2007 ◽  
Vol 129 (4) ◽  
pp. 550-558 ◽  
Author(s):  
L. Durrenberger ◽  
J. R. Klepaczko ◽  
A. Rusinek
Keyword(s):  
Constitutive Modeling ◽  
Threshold Stress ◽  
Industrial Applications ◽  
Strain Rates ◽  
Hollomon Parameter ◽  
Mechanical Threshold ◽  
Compact Formulation ◽  
Wide Range ◽  
Cold Rolled ◽  
Strain Hardening Rate

The mechanical threshold stress (MTS) model is not commonly used in industrial applications due to its complexity. The Zener–Hollomon parameter Z was utilized to develop a simplified and compact formulation similar to the MTS model. The predictions of the proposed formulation are compared to the results obtained by the original MTS model and experimental data. The flow stresses of three cold-rolled steels frequently used in automotive industries were analyzed for both formulations over a wide range of strain rates (8.10−3s−1≤ε¯̇p≤103s−1).

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