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This final project discusses about the design process of Split Hopkinson Pressure Bar (SHPB), that also known as the Kolsky bar as an appratus for determining material properties at high strain rates. This device consists of two long bars, where the specimen is placed between them. The first bar is...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/16726 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | This final project discusses about the design process of Split Hopkinson Pressure Bar (SHPB), that also known as the Kolsky bar as an appratus for determining material properties at high strain rates. This device consists of two long bars, where the specimen is placed between them. The first bar is incident bar and the other one is <br />
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transmitter bar. By firing a projectile into the incident bar, the compressive strain wave is generated and then propagates towards the specimen. When the strain wave <br />
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arrives at the interface between the incident bar and the specimen, part of the wave is reflected back into the incident bar towards the impact end and the rest transmits <br />
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through the specimen into the transmitter bar, causing irreversible plastic deformation in the specimen. Instrumentation can record the strain in the incident bar propagating towards the specimen and being reflected back from the specimen and the strain in the transmitter bar. So that stress-strain properties of the specimen can be determined. SHPB is designed with three (3) main parts, namely the firing system, bar system, and the sensor systems and data processing.The firing system functions to fire the projectile at a speed that is determined and the mass of projectile can be changed. Bar system consists of two bars and frame supports. Sensor systems and data processing functions to record the strain waves that occur on the bars and process them in order to get stress-strain curve. The whole system is designed to be able to produce a strain in the specimen with a strain rate range 103-104 s-1. Design process is done by considering ease of manufacture and the availability of components required. This task is done by following a systematic design steps, from design concept to detailed design. The end result of the design of SHPB is shown in the form of engineering drawings. |
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