Compressive split Hopkinson pressure bar tests with imperfect dimension
When studying mechanical and engineering failure, mechanical properties of materials used in the system are often studied as part of the investigation. How materials behave in a quasi-static environment have been thoroughly studied and information on how they perform are widely shared across the int...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2022
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| Online Access: | https://hdl.handle.net/10356/163717 |
| _version_ | 1811689719812063232 |
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| author | Lee, Clive Tzen Liang |
| author2 | Shu Dong Wei |
| author_facet | Shu Dong Wei Lee, Clive Tzen Liang |
| author_sort | Lee, Clive Tzen Liang |
| collection | NTU |
| description | When studying mechanical and engineering failure, mechanical properties of materials used in the system are often studied as part of the investigation. How materials behave in a quasi-static environment have been thoroughly studied and information on how they perform are widely shared across the internet and in engineering industries. However, information on how they behave in high strain rate circumstances is scarce in comparison. Knowledge on how they behave in dynamic environments will give us a better understanding of the stress and strain rate which can be crucial in investigating said engineering failures.
To study this, the Split Hopkinson Pressure Bar (SHPB) was thus invented to investigate the properties of materials at high strain rates. Depending on configuration, it was able to conduct tests under compression, tension and torsion. With the use of a nitrogen gas gun, the SHPB would utilize strain gauges mounted on its incident and transmission bars to record waves propagated from the impact of the striker bar through the specimen being tested.
This report will focus on compressive study of the SHPB, in particular, specimens with imperfections. On top of conducting service and repair of the SHPB, the author recreated experiments of previous students to ensure accuracy of results before conducting investigative study on how certain imperfections affect the maximum strain of the specimens and its relevance to modern day engineering. |
| first_indexed | 2024-10-01T05:52:35Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/163717 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:52:35Z |
| publishDate | 2022 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1637172023-03-04T20:17:36Z Compressive split Hopkinson pressure bar tests with imperfect dimension Lee, Clive Tzen Liang Shu Dong Wei School of Mechanical and Aerospace Engineering MDSHU@ntu.edu.sg Engineering::Mechanical engineering When studying mechanical and engineering failure, mechanical properties of materials used in the system are often studied as part of the investigation. How materials behave in a quasi-static environment have been thoroughly studied and information on how they perform are widely shared across the internet and in engineering industries. However, information on how they behave in high strain rate circumstances is scarce in comparison. Knowledge on how they behave in dynamic environments will give us a better understanding of the stress and strain rate which can be crucial in investigating said engineering failures. To study this, the Split Hopkinson Pressure Bar (SHPB) was thus invented to investigate the properties of materials at high strain rates. Depending on configuration, it was able to conduct tests under compression, tension and torsion. With the use of a nitrogen gas gun, the SHPB would utilize strain gauges mounted on its incident and transmission bars to record waves propagated from the impact of the striker bar through the specimen being tested. This report will focus on compressive study of the SHPB, in particular, specimens with imperfections. On top of conducting service and repair of the SHPB, the author recreated experiments of previous students to ensure accuracy of results before conducting investigative study on how certain imperfections affect the maximum strain of the specimens and its relevance to modern day engineering. Bachelor of Engineering (Mechanical Engineering) 2022-12-15T13:07:29Z 2022-12-15T13:07:29Z 2023 Final Year Project (FYP) Lee, C. T. L. (2023). Compressive split Hopkinson pressure bar tests with imperfect dimension. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/163717 https://hdl.handle.net/10356/163717 en B455 application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Mechanical engineering Lee, Clive Tzen Liang Compressive split Hopkinson pressure bar tests with imperfect dimension |
| title | Compressive split Hopkinson pressure bar tests with imperfect dimension |
| title_full | Compressive split Hopkinson pressure bar tests with imperfect dimension |
| title_fullStr | Compressive split Hopkinson pressure bar tests with imperfect dimension |
| title_full_unstemmed | Compressive split Hopkinson pressure bar tests with imperfect dimension |
| title_short | Compressive split Hopkinson pressure bar tests with imperfect dimension |
| title_sort | compressive split hopkinson pressure bar tests with imperfect dimension |
| topic | Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/163717 |
| work_keys_str_mv | AT leeclivetzenliang compressivesplithopkinsonpressurebartestswithimperfectdimension |