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E-Thesis 285 views 117 downloads

The dynamic mechanical interactions associated with polyurethane baton rounds. / Stewart Peter Atkin

Swansea University Author: Stewart Peter Atkin

Abstract

This thesis examines the important materials issues related to the design, improvement and biomedical assessment of baton rounds. In particular, it focusses on the time-dependent mechanical interactions between polyurethane and bone. The project initially deals with the mechanical behaviour of the p...

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Published: 2002
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42258
first_indexed 2018-08-02T18:54:16Z
last_indexed 2018-08-03T10:09:40Z
id cronfa42258
recordtype RisThesis
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spelling 2018-08-02T16:24:28.6045852 v2 42258 2018-08-02 The dynamic mechanical interactions associated with polyurethane baton rounds. bbf9914a55914deed9bafc10b8b36305 NULL Stewart Peter Atkin Stewart Peter Atkin true true 2018-08-02 This thesis examines the important materials issues related to the design, improvement and biomedical assessment of baton rounds. In particular, it focusses on the time-dependent mechanical interactions between polyurethane and bone. The project initially deals with the mechanical behaviour of the polyurethane elastomers used for baton rounds. Using a variety of mechanical and environmental exposure tests, a better understanding is gained of the mechanical properties required for consistent performance. In particular, the importance of rebound resilience is identified when relating quasi-static quality control tests to impact behaviour. The thesis then concentrates on the dynamic mechanical properties of bone, with particular consideration to the measurement of shear modulus, which has been identified as a key parameter for modelling of baton round impacts. A combination of re-analysis of previously reported data and torsional testing of bovine scapulae samples has yielded a good understanding of the shear behaviour of bone and the effect of test rate. In addition, various synthetic bone materials have been characterised, in an attempt to design a bone simulant material that could be used for impact trials. This work has established the basis for a successful simulant based on fibre composites and polyurethane foam. The final section of the thesis comprises a brief examination of various options to design energy attenuating baton round systems that will further reduce the potential for head injury. E-Thesis Materials science.;Plastics. 31 12 2002 2002-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:28.6045852 2018-08-02T16:24:28.6045852 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Stewart Peter Atkin NULL 1 0042258-02082018162440.pdf 10797966.pdf 2018-08-02T16:24:40.3830000 Output 15462069 application/pdf E-Thesis true 2018-08-02T16:24:40.3830000 false
title The dynamic mechanical interactions associated with polyurethane baton rounds.
spellingShingle The dynamic mechanical interactions associated with polyurethane baton rounds.
Stewart Peter Atkin
title_short The dynamic mechanical interactions associated with polyurethane baton rounds.
title_full The dynamic mechanical interactions associated with polyurethane baton rounds.
title_fullStr The dynamic mechanical interactions associated with polyurethane baton rounds.
title_full_unstemmed The dynamic mechanical interactions associated with polyurethane baton rounds.
title_sort The dynamic mechanical interactions associated with polyurethane baton rounds.
author_id_str_mv bbf9914a55914deed9bafc10b8b36305
author_id_fullname_str_mv bbf9914a55914deed9bafc10b8b36305_***_Stewart Peter Atkin
author Stewart Peter Atkin
author2 Stewart Peter Atkin
format E-Thesis
publishDate 2002
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description This thesis examines the important materials issues related to the design, improvement and biomedical assessment of baton rounds. In particular, it focusses on the time-dependent mechanical interactions between polyurethane and bone. The project initially deals with the mechanical behaviour of the polyurethane elastomers used for baton rounds. Using a variety of mechanical and environmental exposure tests, a better understanding is gained of the mechanical properties required for consistent performance. In particular, the importance of rebound resilience is identified when relating quasi-static quality control tests to impact behaviour. The thesis then concentrates on the dynamic mechanical properties of bone, with particular consideration to the measurement of shear modulus, which has been identified as a key parameter for modelling of baton round impacts. A combination of re-analysis of previously reported data and torsional testing of bovine scapulae samples has yielded a good understanding of the shear behaviour of bone and the effect of test rate. In addition, various synthetic bone materials have been characterised, in an attempt to design a bone simulant material that could be used for impact trials. This work has established the basis for a successful simulant based on fibre composites and polyurethane foam. The final section of the thesis comprises a brief examination of various options to design energy attenuating baton round systems that will further reduce the potential for head injury.
published_date 2002-12-31T01:47:54Z
_version_ 1821458798415446016
score 11.064692

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