A constitutive model for high strain rate deformation in FCC metals based on irreversible thermodynamics

2009 ◽  
Vol 41 (9) ◽  
pp. 982-988 ◽  
Author(s):  
Mingxin Huang ◽  
Pedro E.J. Rivera-Díaz-del-Castillo ◽  
Olivier Bouaziz ◽  
Sybrand van der Zwaag
Keyword(s):  
Constitutive Model ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Irreversible Thermodynamics ◽  
Fcc Metals ◽  
High Strain Rate Deformation

High-strain-rate deformation and comminution of silicon carbide

1998 ◽  
Vol 83 (9) ◽  
pp. 4660-4671 ◽  
Author(s):  
C. J. Shih ◽  
V. F. Nesterenko ◽  
M. A. Meyers
Keyword(s):  
Silicon Carbide ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
High Strain Rate Deformation

Study on Dynamic Mechanical Response of TC21 Alloy

2011 ◽  
Vol 88-89 ◽  
pp. 674-678
Author(s):  
Shuang Zan Zhao ◽  
Xing Wang Cheng ◽  
Fu Chi Wang
Keyword(s):  
Flow Stress ◽  
High Strain Rate ◽  
Strain Rate ◽  
Strain Hardening ◽  
High Strain ◽  
Dynamic Flow ◽  
Dynamic Mechanical ◽  
Hardening Effect ◽  
High Strain Rate Deformation ◽  
Binary Morphology

Some results of an experimental study on high strain rate deformation of TC21 alloy are discussed in this paper. Cylindrical specimens of the TC21 alloys both in binary morphology and solution and aging morphology were subjected to high strain rate deformation by direct impact using a Split Hopkinson Pressure Bar. The deformation process is dominated by both thermal softening effect and strain hardening effect under high strain rate loading. Thus the flow stress doesn’t increase with strain rate at the strain hardening stage, while the increase is obvious under qusi-static compression. Under high strain rate, the dynamic flow stress is higher than that under quasi-static and dynamic flow stress increase with the increase of the strain rate, which indicates the strain rate hardening effect is great in TC21 alloy. The microstructure affects the dynamic mechanical properties of TC21 titanium alloy obviously. Under high strain rate, the solution and aging morphology has higher dynamic flow stress while the binary morphology has better plasticity and less prone to be instability under high strain rate condition. Shear bands were found both in the solution and aging morphology and the binary morphology.

Physical constitutive equations for plastic deformation of FCC metals subjected to high strain rate loading

2015 ◽  
Vol 232 (2) ◽  
pp. 106-120 ◽  
Author(s):  
E Etemadi ◽  
J Zamani ◽  
M Jafarzadeh
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Entropy Generation ◽  
Constitutive Equations ◽  
High Strain ◽  
Velocity Shear ◽  
Viscous Drag ◽  
Shear Strain Rate ◽  
Face Centered Cubic ◽  
Fcc Metals

This paper develops a new physically based model to investigate face centered cubic (FCC) metals and alloys under high strain rate loadings (\gt104 s−1) which includes kinematics and constitutive equations for the propagation of elastic and steady plastic waves. The model’s formulations are based on the rate of the conservation energy law that includes the rate of the input energy, internal energy, and entropy generation. This formulation is obtained by incorporating the viscous drag effects and associating the entropy generation to the generation, glide, and annihilation of dislocations. The model is used for 6061-T6 aluminum alloys and the results are verified with the published theoretical models and experimental tests. Also, the effect of different parameters, such as the particle velocity, shear flow stress, shear strain rate and temperature are investigated. As a result, the presented model shows good capability in describing the mentioned parameters.

Sign in / Sign up

Export Citation Format

Share Document