scholarly journals Mechanical behavior and texture evolution of WE43 magnesium-rare earth alloy in Split-Hopkinson Pressure Bar and Taylor Impact Cylinder Testing

2020 ◽  
Vol 143 ◽  
pp. 103589 ◽  
Author(s):  
Daniel J. Savage ◽  
Brandon A. McWilliams ◽  
Sven C. Vogel ◽  
Carl P. Trujillo ◽  
Irene J. Beyerlein ◽  
...  
Keyword(s):  
Rare Earth ◽  
Mechanical Behavior ◽  
Split Hopkinson Pressure Bar ◽  
Texture Evolution ◽  
Hopkinson Pressure Bar ◽  
Rare Earth Alloy ◽  
Split Hopkinson ◽  
Taylor Impact ◽  
Pressure Bar

INFLUENCE OF THE BONE MORPHOLOGY ON MECHANICAL BEHAVIOR OF HUMAN SKULL FOR TWO STRAIN RATE CASES

2018 ◽  
Vol 18 (04) ◽  
pp. 1850046
Author(s):  
MANAF KARKAR ◽  
CHRISTOPHE MARECHAL ◽  
REMI DELILLE ◽  
GREGORY HAUGOU ◽  
FRANCOIS BRESSON ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Mechanical Response ◽  
Split Hopkinson Pressure Bar ◽  
Parietal Bone ◽  
Hopkinson Pressure Bar ◽  
Bone Morphology ◽  
Split Hopkinson ◽  
Micro Tomography ◽  
Human Skulls ◽  
Pressure Bar

Modeling the mechanical behavior of bone is very complex due to substantial variability of the mechanical response of bone. The objective of this study is to investigate the link between morphology of the human parietal bone and its mechanical behavior in compression with two different strain rates. Five formalin-preserved human skulls were used, and 10 specimens were taken from the parietal bone of each subject. The internal geometry of the osseous material was studied with a micro-tomography device. For mechanical testing, quasi-static (0.02 s–1) tests on a conventional compression machine and dynamic tests (1500 s–1) on a split Hopkinson pressure bar (SHPB) were conducted on 9 mm diameter samples. The results were used to examine relationships between the morphological parameters to find morphological correlations. Linkages between mechanical behavior and morphology of the human parietal bone were also analyzed to develop a behavior model based on micro-structure parameters as determined by micro-scanning.

scholarly journals Characterization and modeling of mechanical behavior of single crystal titanium deformed by split-Hopkinson pressure bar

2016 ◽  
Vol 82 ◽  
pp. 225-240 ◽  
Author(s):  
B.M. Morrow ◽  
R.A. Lebensohn ◽  
C.P. Trujillo ◽  
D.T. Martinez ◽  
F.L. Addessio ◽  
...  
Keyword(s):  
Single Crystal ◽  
Mechanical Behavior ◽  
Split Hopkinson Pressure Bar ◽  
Hopkinson Pressure Bar ◽  
Split Hopkinson ◽  
Pressure Bar

SHPB Test on Dynamical Mechanical Behavior of Concrete with High Temperature

2011 ◽  
Vol 71-78 ◽  
pp. 760-763 ◽  
Author(s):  
Bin Jia ◽  
Zheng Liang Li ◽  
Hua Chuan Yao ◽  
Jun Lin Tao
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Split Hopkinson Pressure Bar ◽  
Experimental System ◽  
Wave Theory ◽  
Hopkinson Pressure Bar ◽  
Temperature Changes ◽  
Split Hopkinson ◽  
Pressure Bar

An experimental system is designed by combining the split Hopkinson pressure bar (SHPB) with microwave heating device, based on stress wave theory, availability of the experiment technique is analyzed. Tests of concrete whose temperature changes from room temperature to 650°C and impact velocity from 5m/s to 12m/s are completed and for the first time high-temperature dynamical damaging phenomena of concrete are obtained. Based on data analysis, the dynamical mechanical behavior of concrete with high temperature is affected by not only the strain rate effect whose influence keeps on decreasing with temperature increasing, but also the high temperature weakening effect. And the strain rate hardening effect is coupled with high temperature weakening effect, but the latter has greater influence.

Mechanical Behavior of Concrete Subjected to Impact Loading

2012 ◽  
Vol 174-177 ◽  
pp. 512-515
Author(s):  
Hai Feng Liu ◽  
Jian Guo Ning
Keyword(s):  
Mechanical Behavior ◽  
Split Hopkinson Pressure Bar ◽  
Cement Mortar ◽  
Fragment Size ◽  
Hopkinson Pressure Bar ◽  
Rate Dependent ◽  
Dynamic Mechanical Behavior ◽  
Load Carrying ◽  
Split Hopkinson ◽  
Pressure Bar

A 74-mm-diameter split Hopkinson pressure bar (SHPB) is used to test the dynamic mechanical behavior of concrete and cement mortar. Experimental results show that concrete and cement mortar are rate-dependent. The load-carrying capacity of concrete is higher than that of cement mortar. Whereas, the maximum strain of concrete is lower than that of cement mortar. No matter for concrete or cement mortar, with the increase of impact velocity, the fragment size of specimens after experiment decreases.

SHPB Test on Dynamical Mechanical Behavior of Concrete with High Temperature

2014 ◽  
Vol 528 ◽  
pp. 61-69
Author(s):  
Bin Jia ◽  
Fan Yang ◽  
Kun Lin Sun ◽  
Ru Heng Wang
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Split Hopkinson Pressure Bar ◽  
Experimental System ◽  
Wave Theory ◽  
Hopkinson Pressure Bar ◽  
Temperature Changes ◽  
Split Hopkinson ◽  
Pressure Bar

An experimental system is designed by combining the split Hopkinson pressure bar (SHPB) with microwave heating device, based on numerical simulation and stress wave theory, availability of the experiment technique is analyzed. Tests of concrete whose temperature changes from room temperature to 650°C and impact velocity from 5m /s to 12m /s are completed and for the first time high-temperature dynamical damaging phenomena of concrete are obtained. Based on data analysis, the dynamical mechanical behavior of concrete with high temperature is affected by not only the strain rate effect whose influence keeps on decreasing with temperature increasing, but also the high temperature weakening effect. And the strain rate hardening effect is coupled with high temperature weakening effect, but the latter has greater influence.

Analysis of the Impact of the Frequency Range of the Tensometer Bridge and Projectile Geometry on the Results of Measurements by the Split Hopkinson Pressure Bar Method

2013 ◽  
Vol 20 (4) ◽  
pp. 555-564 ◽  
Author(s):  
Wojciech Moćko
Keyword(s):  
Test Bench ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Deformation ◽  
Spectral Width ◽  
Hopkinson Pressure Bar ◽  
Computing Environment ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
The Impact ◽  
Bench Model

Abstract The paper presents the results of the analysis of the striker shape impact on the shape of the mechanical elastic wave generated in the Hopkinson bar. The influence of the tensometer amplifier bandwidth on the stress-strain characteristics obtained in this method was analyzed too. For the purposes of analyzing under the computing environment ABAQUS / Explicit the test bench model was created, and then the analysis of the process of dynamic deformation of the specimen with specific mechanical parameters was carried out. Based on those tests, it was found that the geometry of the end of the striker has an effect on the form of the loading wave and the spectral width of the signal of that wave. Reduction of the striker end diameter reduces unwanted oscillations, however, adversely affects the time of strain rate stabilization. It was determined for the assumed test bench configuration that a tensometric measurement system with a bandwidth equal to 50 kHz is sufficient

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