Shpb

SHPB is most widely used tool for the dynamic characterisation of the materials. The working principles of Hopkinson pressure bar is explained in many research publication [1, 2]. Actual image along with the schematic diagram of the sandwiched specimen between two bars is presented below. Original SHPB was designed primarily for testing materials under dynamic compression, since then it has been extensively used for that purpose [3].

Many materials that are used in modern engineering applications exhibit high strain rate sensitivity in their stress-strain response. To keep pace with the advances in the technology researchers are forced to investigate the constitutive relations at very high rate of loading. This shift in paradigm has resulted in a new focus on the experimental techniques capable of monitoring material behavior at very high strain rates. The biggest challenge with dynamic characterization is to make sure that similar conditions are maintained as those with quasi-static tests. Most important of these are stress equilibrium and homogenous deformation.

Our Customized solutions offers the capability of evaluating wide range of material type (soft to hard) thanks mainly due to our modular design. It allow users to swap different kind of bars with ease, and to adjust projectile launch pressure and its velocity. When you buy SHPB from us you also get a high speed data acquisition (>10 MHz/Channel) along with the customized Matlab based software for the analysis. Some of the hardware and data acquisition options offered by us can be seen below:

Bar Strength: 100 to 1400 MPa	Bar Diameter: 12 to 50mm	Bar Type: Solid and Hollow	Strain Rate: 100 to 10000
Acquisition: 4 Analog & 4 Digital	Sampling Rate: 1 to 10 Mhz/Ch	Trigger: Internal and External	Analysis software: SHPB 2.0A

For any information or a customisation of SHPB for your need, you can contact us through our contact us page.

References:
[1] Hopkinson B, A method of measuring the pressure produced in the detonation of high explosives or by the impact of bullets, Philos Trans R Soc Lond, A 213:437–456, 1914.
[2] Kolsky H, An investigation of mechanical properties of materials at very high rates of loading, Proc Phys Soc, B 62:676– 700, 1949.
[3] Chen W and Song B, Split Hopkinson (Kolsky) Bar: Design Testing and Applications. Springer, New York, 2011.