No Cover Image

E-Thesis 43 views 30 downloads

Multiscale Deformation Modelling of Small Scale Mechanical Tests / TRISTAN KAY

Swansea University Author: TRISTAN KAY

  • 2025_McKay_T.final71076.pdf

    PDF | E-Thesis – open access

    Copyright: The Author, Tristan Hearsey McKay, 2024 Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0)

    Download (6.23MB)

DOI (Published version): 10.23889/SUThesis.71076

Abstract

Novel techniques that accelerate the development of new steel alloys by combining miniaturised tests with modelling techniques is key for TATA steel to remain competitive. The research undertaken here modelled the deformation of small-scale mechanical tests of dual-phase steels as part of a Rapid Al...

Full description

Published: Swansea 2025
Institution: Swansea University
Degree level: Doctoral
Degree name: EngD
Supervisor: Harrison, W.; Farrugia, D.; and Peric, D.
URI: https://cronfa.swan.ac.uk/Record/cronfa71076
first_indexed 2025-12-04T11:12:44Z
last_indexed 2025-12-05T18:13:26Z
id cronfa71076
recordtype RisThesis
fullrecord <?xml version="1.0"?><rfc1807><datestamp>2025-12-04T11:16:17.5500112</datestamp><bib-version>v2</bib-version><id>71076</id><entry>2025-12-04</entry><title>Multiscale Deformation Modelling of Small Scale Mechanical Tests</title><swanseaauthors><author><sid>e71d78352582f0f2c91b5025fbc20f6a</sid><firstname>TRISTAN</firstname><surname>KAY</surname><name>TRISTAN KAY</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2025-12-04</date><abstract>Novel techniques that accelerate the development of new steel alloys by combining miniaturised tests with modelling techniques is key for TATA steel to remain competitive. The research undertaken here modelled the deformation of small-scale mechanical tests of dual-phase steels as part of a Rapid Alloying Process. This was achieved via a multiscale approach using finite element models developed in ABAQUS to simulate deformation of shear punch tests at the continuum level and microstructural deformation modelling via representative volume elements using synthetically generated microstructures. An axisymmetric modelling approach was first used to validate geometrical parameters of the shear punch test. This showed that the radius of the punch head and corner tip radiuses are key aspects that must be controlled for when setting up experimental test rigs to ensure that shear dominant deformation takes place and minimize other deformation mechanisms like bending or stretching of test pieces. A 3D half-symmetry model was developed to review advanced damage mechanisms that develop during shear punch tests. From this it was concluded that due to the multiphase nature of dual phase steels, continuum modelling alone is not enough to characterise the deformation of dual phase steels. Whilst strength characteristics of dual phase correlated well with experimental tests the ductility and elongation values did not correlate with real world experimentation.Microstructural deformation was modelled using representative volume elements to characterise the deformation of a pure ferrite-martensite dual phase steel using both 2D and 3D models. Synthetic models using a composite approach with variable martensite content were successfully used to review dual phase steel deformation, generating better results than using a real microstructure. This work produced a plug-in script which was used to automatically generate 2D microstructural models of dual phase steels whose parameters could easily be varied. Whilst the 2D microscale modelling approach was not exhaustive in accounting for all characteristics of dual phase alloy, it did show that composite modelling of these kinds of steels can be used to generate reliable predictions of mechanical properties and deformation evolution when used for the development prototype steel alloys as part of a Rapid Alloy Prototyping process.</abstract><type>E-Thesis</type><journal/><volume/><journalNumber/><paginationStart/><paginationEnd/><publisher/><placeOfPublication>Swansea</placeOfPublication><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic/><keywords>Shear Punch Test, Dual Phase Steel, Representative Volume Elements, microscale modelling, geometry parameters, axisymmetric modelling, Rapid Alloy Prototyping, Shear Punch Modelling</keywords><publishedDay>10</publishedDay><publishedMonth>8</publishedMonth><publishedYear>2025</publishedYear><publishedDate>2025-08-10</publishedDate><doi>10.23889/SUThesis.71076</doi><url/><notes/><college>COLLEGE NANME</college><CollegeCode>COLLEGE CODE</CollegeCode><institution>Swansea University</institution><supervisor>Harrison, W.; Farrugia, D.; and Peric, D.</supervisor><degreelevel>Doctoral</degreelevel><degreename>EngD</degreename><degreesponsorsfunders>EPSRC doctoral training grant, Tata Steel</degreesponsorsfunders><apcterm/><funders>EPSRC doctoral training grant, Tata Steel</funders><projectreference/><lastEdited>2025-12-04T11:16:17.5500112</lastEdited><Created>2025-12-04T11:06:35.2661732</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Materials Science and Engineering</level></path><authors><author><firstname>TRISTAN</firstname><surname>KAY</surname><order>1</order></author></authors><documents><document><filename>71076__35755__42416d0c9d41422c897ca7f16f0da11a.pdf</filename><originalFilename>2025_McKay_T.final71076.pdf</originalFilename><uploaded>2025-12-04T11:12:12.3196018</uploaded><type>Output</type><contentLength>6534895</contentLength><contentType>application/pdf</contentType><version>E-Thesis &#x2013; open access</version><cronfaStatus>true</cronfaStatus><documentNotes>Copyright: The Author, Tristan Hearsey McKay, 2024 Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0)</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language><licence>https://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807>
spelling 2025-12-04T11:16:17.5500112 v2 71076 2025-12-04 Multiscale Deformation Modelling of Small Scale Mechanical Tests e71d78352582f0f2c91b5025fbc20f6a TRISTAN KAY TRISTAN KAY true false 2025-12-04 Novel techniques that accelerate the development of new steel alloys by combining miniaturised tests with modelling techniques is key for TATA steel to remain competitive. The research undertaken here modelled the deformation of small-scale mechanical tests of dual-phase steels as part of a Rapid Alloying Process. This was achieved via a multiscale approach using finite element models developed in ABAQUS to simulate deformation of shear punch tests at the continuum level and microstructural deformation modelling via representative volume elements using synthetically generated microstructures. An axisymmetric modelling approach was first used to validate geometrical parameters of the shear punch test. This showed that the radius of the punch head and corner tip radiuses are key aspects that must be controlled for when setting up experimental test rigs to ensure that shear dominant deformation takes place and minimize other deformation mechanisms like bending or stretching of test pieces. A 3D half-symmetry model was developed to review advanced damage mechanisms that develop during shear punch tests. From this it was concluded that due to the multiphase nature of dual phase steels, continuum modelling alone is not enough to characterise the deformation of dual phase steels. Whilst strength characteristics of dual phase correlated well with experimental tests the ductility and elongation values did not correlate with real world experimentation.Microstructural deformation was modelled using representative volume elements to characterise the deformation of a pure ferrite-martensite dual phase steel using both 2D and 3D models. Synthetic models using a composite approach with variable martensite content were successfully used to review dual phase steel deformation, generating better results than using a real microstructure. This work produced a plug-in script which was used to automatically generate 2D microstructural models of dual phase steels whose parameters could easily be varied. Whilst the 2D microscale modelling approach was not exhaustive in accounting for all characteristics of dual phase alloy, it did show that composite modelling of these kinds of steels can be used to generate reliable predictions of mechanical properties and deformation evolution when used for the development prototype steel alloys as part of a Rapid Alloy Prototyping process. E-Thesis Swansea Shear Punch Test, Dual Phase Steel, Representative Volume Elements, microscale modelling, geometry parameters, axisymmetric modelling, Rapid Alloy Prototyping, Shear Punch Modelling 10 8 2025 2025-08-10 10.23889/SUThesis.71076 COLLEGE NANME COLLEGE CODE Swansea University Harrison, W.; Farrugia, D.; and Peric, D. Doctoral EngD EPSRC doctoral training grant, Tata Steel EPSRC doctoral training grant, Tata Steel 2025-12-04T11:16:17.5500112 2025-12-04T11:06:35.2661732 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering TRISTAN KAY 1 71076__35755__42416d0c9d41422c897ca7f16f0da11a.pdf 2025_McKay_T.final71076.pdf 2025-12-04T11:12:12.3196018 Output 6534895 application/pdf E-Thesis – open access true Copyright: The Author, Tristan Hearsey McKay, 2024 Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0) true eng https://creativecommons.org/licenses/by/4.0/
title Multiscale Deformation Modelling of Small Scale Mechanical Tests
spellingShingle Multiscale Deformation Modelling of Small Scale Mechanical Tests
TRISTAN KAY
title_short Multiscale Deformation Modelling of Small Scale Mechanical Tests
title_full Multiscale Deformation Modelling of Small Scale Mechanical Tests
title_fullStr Multiscale Deformation Modelling of Small Scale Mechanical Tests
title_full_unstemmed Multiscale Deformation Modelling of Small Scale Mechanical Tests
title_sort Multiscale Deformation Modelling of Small Scale Mechanical Tests
author_id_str_mv e71d78352582f0f2c91b5025fbc20f6a
author_id_fullname_str_mv e71d78352582f0f2c91b5025fbc20f6a_***_TRISTAN KAY
author TRISTAN KAY
author2 TRISTAN KAY
format E-Thesis
publishDate 2025
institution Swansea University
doi_str_mv 10.23889/SUThesis.71076
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 - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Novel techniques that accelerate the development of new steel alloys by combining miniaturised tests with modelling techniques is key for TATA steel to remain competitive. The research undertaken here modelled the deformation of small-scale mechanical tests of dual-phase steels as part of a Rapid Alloying Process. This was achieved via a multiscale approach using finite element models developed in ABAQUS to simulate deformation of shear punch tests at the continuum level and microstructural deformation modelling via representative volume elements using synthetically generated microstructures. An axisymmetric modelling approach was first used to validate geometrical parameters of the shear punch test. This showed that the radius of the punch head and corner tip radiuses are key aspects that must be controlled for when setting up experimental test rigs to ensure that shear dominant deformation takes place and minimize other deformation mechanisms like bending or stretching of test pieces. A 3D half-symmetry model was developed to review advanced damage mechanisms that develop during shear punch tests. From this it was concluded that due to the multiphase nature of dual phase steels, continuum modelling alone is not enough to characterise the deformation of dual phase steels. Whilst strength characteristics of dual phase correlated well with experimental tests the ductility and elongation values did not correlate with real world experimentation.Microstructural deformation was modelled using representative volume elements to characterise the deformation of a pure ferrite-martensite dual phase steel using both 2D and 3D models. Synthetic models using a composite approach with variable martensite content were successfully used to review dual phase steel deformation, generating better results than using a real microstructure. This work produced a plug-in script which was used to automatically generate 2D microstructural models of dual phase steels whose parameters could easily be varied. Whilst the 2D microscale modelling approach was not exhaustive in accounting for all characteristics of dual phase alloy, it did show that composite modelling of these kinds of steels can be used to generate reliable predictions of mechanical properties and deformation evolution when used for the development prototype steel alloys as part of a Rapid Alloy Prototyping process.
published_date 2025-08-10T05:31:02Z
_version_ 1851369835759403008
score 11.089572

Similar Items