Spb Lab Report

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Numerical modelling of modified Split Hopkinson pressure bar and active behaviour of various geometries of material an under active condition: A Review
Prof. Ashok Atulkar1 and Shivam Singh2
1Prof. Department of Mechanical Engineering, S.G.S.I.T.S, Indore
2M.E Student Department of Mechanical Engineering S.G.S.I.T.S, Indore

The report reports a review of basic terms of the Split Hopkinson pressure bar to study the dynamic behaviour of materials under dynamic condition. The FEM method and AQAQUS/CAE are used for modelling and simulation of modified Split Hopkinson pressure bar.
Keywords: Split Hopkinson pressure bar, Dynamic loading, Stress-Strain behaviour, FEM modelling.

The Split Hopkinson pressure bar is one of the
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Impact generates an elastic wave which travels from incident bar reaches the specimen transmitted a part of the energy in the transmission a part of the energy is transmitted bar and some energy reflected back. The Split Hopkinson Pressure Bar (SHPB) System is utilised for testing out different materials at high line rates in tension, compression and torsion ways. By changing the specimen holding fixture and changing the loading attachment the same instrument can be used for tension, compression and torsion tests. High temperature heating system can be drawn around the specimen for carrying out high temperature check. The Split Hopkinson Pressure Bar (SHPB) System should be compatible with GTRE power supply conditions of input voltage 220-230 V AC, single phase, frequency-50HzThe Split Hopkinson Pressure Bar (SHPB) System should be capable of conducting compressive testing at strain rates extending from 50 s-1 or a smaller amount to 10,000 s-1 or more at room temperature. The same system should also be configured for conducting tensile testing at line rates ranging from to 50 s-1 or less to 2000 s-1 or more at room temperature. Formulate the SHPB system with High strength material so that all Al alloys, Cu- alloys,…show more content…
All the bars must have a straightness of 0.1 mm/m or a value lesser than 0.1 mm/m. Essential fittings for incident bar and transmitter bar should be provided for assisting compression and tensile mode of testing and also, to live a high stress rate, high temperature testing. Strain gauges should be mounted suitably on Incident bar and a transmitter bar to measure the strains generated during testing.

Figure1. Split Hopkinson pressure bar

Aim and objectives of work
Split Hopkinson pressure bar in most versatile apparatus for regulating the active behaviour of materials. To get a simple FEM of SHPB and numerical analysis was borne away in the present investigation and to simulate dynamic compression response based on quasi-static test to amount the mechanical response at high line rates and examine the dynamic compression properties, i.e. energy absorption and compressive force at advanced strain rates, to improve full scales stress-strain curves at altered strain rates and to examine the strain rate behaviour of differing materials.

 Modelling and test various geometries of specimens.
 Compare the experimental value with numerical test result values.
 Modelling and simulation of Split Hopkinson pressure bar (Kolsky bar) set up.
 To study the stress, strain behaviour and stress wave propagation in the

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