scholarly journals Numerical investigation on the effect of specimen gripping arrangement on dynamic shear characterization using Torsion Split Hopkinson Bar

2021 ◽  
Vol 250 ◽  
pp. 02032
Author(s):  
Bhaskar Ramagiri ◽  
Chandra Sekher Yerramalli
Keyword(s):  
Numerical Experiments ◽  
Pure Shear ◽  
Hopkinson Bar ◽  
Shear Loading ◽  
Dynamic Shear ◽  
Split Hopkinson Bar ◽  
The Third ◽  
Split Hopkinson ◽  
Tubular Specimens

Torsion Split Hopkinson Bar (TSHB) is widely used in the dynamic shear characterization of material under pure shear loading. In TSHB, tubular specimens with either circular or hexagonal flanges are used. The specimens with circular flanges are generally bonded using adhesive to the incident and transmission bars. The specimens with hexagonal flanges are gripped into the hexagonal holders that are fixed onto incident and transmission bars. In the current study, numerical simulations are carried out to see the effect of gripping arrangements on the dynamic shear characterization quality. Numerical experiments with three gripping configurations are studied—the first gripping configuration with a direct bond (numerically-tie) between specimen and bars. The second configuration with the specimen gripped by hexagonal holders fixed to bars. The third configuration with specimen directly gripped into the incident and transmission bars having hexagonal slots.

scholarly journals NEW EXPERIMENTAL SAMPLE FOR SHEAR TESTING OF ADHESIVELY BONDED ASSEMBLIES

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1081-1086 ◽  
Author(s):  
GEORGES CHALLITA ◽  
RAMZI OTHMAN ◽  
PIERRICK GUEGAN ◽  
KHALID KHALIL ◽  
ARNAUD POITOU
Keyword(s):  
Hopkinson Bar ◽  
Shear Loading ◽  
Shear Behaviour ◽  
Experimental Sample ◽  
Adhesively Bonded ◽  
Compressive Wave ◽  
Split Hopkinson Bar ◽  
Humidity Effects ◽  
Sample Geometry ◽  
Split Hopkinson

In this paper, Split Hopkinson Bar technique was used to investigate the shear behaviour of adhesively bonded assemblies at high rates of loading. New sample geometry was adopted so that the compressive wave is transformed in a shear loading in the sample. Samples are conditioned at 20°C and 50% of hygrometry to eliminate any interference with temperature and humidity effects. The new technique is applied to an assembly built with a cyanoacrylate based adhesive and a metallic (Steel) adherent. They are found to be highly rate sensitive.

scholarly journals A Review of the Torsional Split Hopkinson Bar

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Xiao Yu ◽  
Li Chen ◽  
Qin Fang ◽  
Xiquan Jiang ◽  
Yongkang Zhou
Keyword(s):  
Experimental Technique ◽  
High Strain ◽  
Pure Shear ◽  
Single Pulse ◽  
Hopkinson Bar ◽  
Combined Loading ◽  
Strain Rates ◽  
High Strain Rates ◽  
Split Hopkinson Bar ◽  
Split Hopkinson

Mechanical behavior of materials at medium and high strain rates (101∼104 s−1) is the foundation of developing mechanical theories, building material models, and promoting engineering design and construction. The torsional split Hopkinson bar (TSHB) is an effective experimental technique for measuring the pure shear mechanical properties of materials at high strain rates. In this study, the state-of-the-art in TSHB experimental technique is presented. Five typical types of TSHB loading mechanisms, i.e., prestored energy loading, explosive loading, direct impact loading, flywheel loading, and electromagnetic loading, were systematically reviewed. The TSHB fundamentals were outlined, which include elementary components, basic assumptions, working principles, the pulse shaping technique, specimen design, and the single-pulse loading technique. In addition, the combined loading and high/low temperature experimental techniques, which were developed based on TSHB, were also discussed in detail. Nearly all necessary elements for conducting a TSHB experiment and analyzing the experimental data were provided. Some research directions should be further pursued, such as extending the range of applicable materials and developing the combined loading techniques.

Methodological aspects of testing brittle materials using the split Hopkinson bar technique

Strain ◽  
2021 ◽  
Author(s):  
Anatoly M. Bragov ◽  
Leonid A. Igumnov ◽  
Aleksandr Y. Konstantinov ◽  
Leopold Kruszka ◽  
Dmitry A. Lamzin ◽  
...  
Keyword(s):  
Brittle Materials ◽  
Hopkinson Bar ◽  
Split Hopkinson Bar ◽  
Split Hopkinson ◽  
Methodological Aspects

scholarly journals Experiments and simulation of split Hopkinson Bar tests on sand

2014 ◽  
Vol 500 (11) ◽  
pp. 112018 ◽  
Author(s):  
P D Church ◽  
P J Gould ◽  
A D Wood ◽  
A Tyas
Keyword(s):  
Hopkinson Bar ◽  
Split Hopkinson Bar ◽  
Split Hopkinson
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