Research of Constitutive Relation of Metal Powder in High Velocity Compaction

2010 ◽  
Vol 97-101 ◽  
pp. 1154-1160
Author(s):  
Zou Shun Zheng ◽  
Yuan Peng Zhu ◽  
Qin Wu Xu ◽  
Xuan Hui Qu
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Metal Powder ◽  
Constitutive Relation ◽  
High Velocity ◽  
High Strain ◽  
Deformation Characteristics ◽  
Viscous Effect ◽  
Linear Spring ◽  
High Velocity Compaction

Metal powders behave high strain rate, viscous effect and first hardening then softening deformation characteristics during the forming process of high velocity compaction. The characteristics of high strain rate and viscous effect are described by composite nonlinear viscoelastic body which consists of non-linear spring, linear spring and high strain rate Maxwell element. The deformation characteristics of first hardening then softening can be described by changing the degree of the term of nonlinear spring from greater than 1 to less than 1. Constitutive relation of metal powder in high velocity compaction is established. The degree of the term of nonlinear spring is considered as a function of strain. The function is approximated by linear, quadratic and cubic polynomial and the stress-strain curves are analyzed respectively. Analysis results indicate that the constitutive equation can describe the deformation characteristics of metal powder in high velocity compaction.

scholarly journals High-Strain-Rate Behavior of a Viscoelastic Gel Under High-Velocity Microparticle Impact

2020 ◽  
Vol 60 (9) ◽  
pp. 1179-1186
Author(s):  
D. Veysset ◽  
Y. Sun ◽  
J. Lem ◽  
S. E. Kooi ◽  
A. A. Maznev ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Velocity ◽  
High Strain ◽  
Rate Behavior ◽  
Strain Rate Behavior ◽  
High Strain Rate Behavior

High strain rate induced localized amorphization in cubic BN/NiCrAl nanocomposite through high velocity impact

2011 ◽  
Vol 65 (7) ◽  
pp. 581-584 ◽  
Author(s):  
Xiao-Tao Luo ◽  
Guan-Jun Yang ◽  
Chang-Jiu Li ◽  
Katsuyoshi Kondoh
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Velocity ◽  
High Strain ◽  
High Velocity Impact ◽  
Velocity Impact

High Velocity Deformation of Metals: Effect of Metallurgical Factors upon High Strain-Rate Behavior

1986 ◽  
Vol 9 ◽  
pp. 145-162
Author(s):  
G.S. Ansell ◽  
David J. Fisher ◽  
P. Haasen ◽  
J.R. Weertman ◽  
Fred H. Wohlbier
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Velocity ◽  
High Strain ◽  
Rate Behavior ◽  
Strain Rate Behavior ◽  
High Strain Rate Behavior

Dynamic Deformation and High Velocity Impact Behaviors of Ti-6Al-4V Alloys

2007 ◽  
Vol 539-543 ◽  
pp. 2269-2274 ◽  
Author(s):  
J.Y. Kim ◽  
In Ok Shim ◽  
H.K. Kim ◽  
S.S. Hong ◽  
Soon Hyung Hong
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Velocity ◽  
High Strain ◽  
Strain Hardening Exponent ◽  
High Velocity Impact ◽  
Test Results ◽  
Compression Tests ◽  
Velocity Impact ◽  
Deformation Behaviors

Deformation behaviors under quasi-static and dynamic compression and high velocity impact condition of Ti-6Al-4V ELI (extra low interstitial) alloys in two different conditions were investigated. Mill annealed (MA) alloy, consisted of equiaxed α, and thermomechanically treated (TMT) alloy, consisted of mixed structure of equiaxed α and transformed β, were prepared. Compression tests were performed in low strain rate regime using hydraulic testing machine and were performed in high strain rate regime using split Hopkinson pressure bar. High velocity impact tests were also performed by impacting the test projectiles made of these alloys against a steel target at a velocity of ~400m/s. The compression test results showed that deformation behaviors were influenced by the strain hardening exponent at low strain rate regime, and by both the strain hardening exponent and the strain-rate hardening rate at high strain rate regime. TMT alloy showed higher strength but almost similar fracture strain as MA alloy at a high strain rate of ~6000/s, due to the effect of strain-rate hardening. The high velocity impact test results showed that the projectile of TMT alloy withstood without fracture at higher impact velocity, but the maximum amounts of deformation prior to crack were nearly the same for both alloys. These results were in accord with the results of compression tests at high strain rate regime, that is, higher strength but same fracture strain of TMT alloy compared to MA alloy.

High Velocity Deformation of Metals: High Strain-Rate Behavior of Single Crystals

1986 ◽  
Vol 9 ◽  
pp. 123-144
Author(s):  
G.S. Ansell ◽  
David J. Fisher ◽  
P. Haasen ◽  
J.R. Weertman ◽  
Fred H. Wohlbier
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Single Crystals ◽  
High Velocity ◽  
High Strain ◽  
Rate Behavior ◽  
Strain Rate Behavior ◽  
High Strain Rate Behavior

High Velocity Deformation of Metals: High Strain-Rate Behavior of Polycrystals

1986 ◽  
Vol 9 ◽  
pp. 85-122 ◽  
Author(s):  
G.S. Ansell ◽  
David J. Fisher ◽  
P. Haasen ◽  
J.R. Weertman ◽  
Fred H. Wohlbier
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Velocity ◽  
High Strain ◽  
Rate Behavior ◽  
Strain Rate Behavior ◽  
High Strain Rate Behavior
Sign in / Sign up

Export Citation Format

Share Document