Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment

Zhang, Lintao; Harrison, Will; Mehraban, Shahin; Brown, Steve; Lavery, Nicholas

doi:10.3390/ma16041458

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Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment

Lintao Zhang, Will Harrison

, Shahin Mehraban, Steve Brown, Nicholas Lavery

Materials, Volume: 16, Issue: 4, Start page: 1458

Swansea University Authors: Will Harrison , Shahin Mehraban, Steve Brown, Nicholas Lavery

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DOI (Published version): 10.3390/ma16041458

Abstract

This work investigated the feasibility of using a miniaturised non-standard tensile specimen to predict the post-necking behaviour of the materials manufactured via a rapid alloy prototyping (RAP) approach. The experimental work focused on the determination of the Lankford coefficients (r-value) of...

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Published in:	Materials
ISSN:	1996-1944
Published:	MDPI AG 2023
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URI:	https://cronfa.swan.ac.uk/Record/cronfa66155
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The experimental work focused on the determination of the Lankford coefficients (r-value) of dual-phase 800 (DP800) steel and the digital image correlation (DIC) for some cases, which were used to help calibrate the damage model parameters of DP800 steel. The three-dimensional numerical simulations focused on the influence of the size effect (aspect ratio, AR) on the post-necking behaviour, such as the strain/stress/triaxiality evolutions, fracture angles, and necking mode transitions. The modelling showed that although a good correlation can be found between the predicted and experimentally observed ultimate tensile strength (UTS) and total elongation. The standard tensile specimen with a gauge length of 80 mm exhibited a fracture angle of ∼55°, whereas the smaller miniaturised non-standard specimens with low ARs exhibited fractures perpendicular to the loading direction. This shows that care must be taken when comparing the post-necking behaviour of small-scale tensile tests, such as those completed as a part of a RAP approach, to the post-necking behaviours of standard full-size test specimens. However, the modelling work showed that this behaviour is well represented, demonstrating a transition between the fracture angles of the samples between 2.5 and 5. 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spelling	v2 66155 2024-04-25 Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment dae59f76fa4f63123aa028abfcd2b07a 0000-0002-0380-7075 Will Harrison Will Harrison true false c7e4a4152b2cf403da129be7d1c2904d Shahin Mehraban Shahin Mehraban true false 07a865adc76376646bc6c03a69ce35a9 Steve Brown Steve Brown true false 9f102ff59824fd4f7ce3d40144304395 0000-0003-0953-5936 Nicholas Lavery Nicholas Lavery true false 2024-04-25 ACEM This work investigated the feasibility of using a miniaturised non-standard tensile specimen to predict the post-necking behaviour of the materials manufactured via a rapid alloy prototyping (RAP) approach. The experimental work focused on the determination of the Lankford coefficients (r-value) of dual-phase 800 (DP800) steel and the digital image correlation (DIC) for some cases, which were used to help calibrate the damage model parameters of DP800 steel. The three-dimensional numerical simulations focused on the influence of the size effect (aspect ratio, AR) on the post-necking behaviour, such as the strain/stress/triaxiality evolutions, fracture angles, and necking mode transitions. The modelling showed that although a good correlation can be found between the predicted and experimentally observed ultimate tensile strength (UTS) and total elongation. The standard tensile specimen with a gauge length of 80 mm exhibited a fracture angle of ∼55°, whereas the smaller miniaturised non-standard specimens with low ARs exhibited fractures perpendicular to the loading direction. This shows that care must be taken when comparing the post-necking behaviour of small-scale tensile tests, such as those completed as a part of a RAP approach, to the post-necking behaviours of standard full-size test specimens. However, the modelling work showed that this behaviour is well represented, demonstrating a transition between the fracture angles of the samples between 2.5 and 5. This provides more confidence in understanding the post-necking behaviour of small-scale tensile tests. Journal Article Materials 16 4 1458 MDPI AG 1996-1944 dual-phase steel; aspect ratio; necking modes; fracture angle; rapid alloy prototyping 9 2 2023 2023-02-09 10.3390/ma16041458 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University Another institution paid the OA fee Rapid Alloy Prototyping Prosperity Partnership project (EP/S005218/1—ACCELERATING ALLOY DEVELOPMENT THROUGH DELIVERING NOVEL PROTOTYPING SOLUTIONS). 2024-05-20T13:03:41.0867665 2024-04-25T11:18:15.4207193 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Lintao Zhang 1 Will Harrison 0000-0002-0380-7075 2 Shahin Mehraban 3 Steve Brown 4 Nicholas Lavery 0000-0003-0953-5936 5 66155__30400__d25231b4812a4ad79d290be97bbdd3c3.pdf 66155.VoR.pdf 2024-05-20T13:00:25.0734928 Output 24523264 application/pdf Version of Record true © 2023 by the authors. This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) license. true eng https://creativecommons.org/licenses/by/4.0/
title	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment
spellingShingle	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment Will Harrison Shahin Mehraban Steve Brown Nicholas Lavery
title_short	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment
title_full	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment
title_fullStr	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment
title_full_unstemmed	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment
title_sort	Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment
author_id_str_mv	dae59f76fa4f63123aa028abfcd2b07a c7e4a4152b2cf403da129be7d1c2904d 07a865adc76376646bc6c03a69ce35a9 9f102ff59824fd4f7ce3d40144304395
author_id_fullname_str_mv	dae59f76fa4f63123aa028abfcd2b07a_*_Will Harrison c7e4a4152b2cf403da129be7d1c2904d__Shahin Mehraban 07a865adc76376646bc6c03a69ce35a9__Steve Brown 9f102ff59824fd4f7ce3d40144304395_*_Nicholas Lavery
author	Will Harrison Shahin Mehraban Steve Brown Nicholas Lavery
author2	Lintao Zhang Will Harrison Shahin Mehraban Steve Brown Nicholas Lavery
format	Journal article
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container_volume	16
container_issue	4
container_start_page	1458
publishDate	2023
institution	Swansea University
issn	1996-1944
doi_str_mv	10.3390/ma16041458
publisher	MDPI AG
college_str	Faculty of Science and Engineering
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description	This work investigated the feasibility of using a miniaturised non-standard tensile specimen to predict the post-necking behaviour of the materials manufactured via a rapid alloy prototyping (RAP) approach. The experimental work focused on the determination of the Lankford coefficients (r-value) of dual-phase 800 (DP800) steel and the digital image correlation (DIC) for some cases, which were used to help calibrate the damage model parameters of DP800 steel. The three-dimensional numerical simulations focused on the influence of the size effect (aspect ratio, AR) on the post-necking behaviour, such as the strain/stress/triaxiality evolutions, fracture angles, and necking mode transitions. The modelling showed that although a good correlation can be found between the predicted and experimentally observed ultimate tensile strength (UTS) and total elongation. The standard tensile specimen with a gauge length of 80 mm exhibited a fracture angle of ∼55°, whereas the smaller miniaturised non-standard specimens with low ARs exhibited fractures perpendicular to the loading direction. This shows that care must be taken when comparing the post-necking behaviour of small-scale tensile tests, such as those completed as a part of a RAP approach, to the post-necking behaviours of standard full-size test specimens. However, the modelling work showed that this behaviour is well represented, demonstrating a transition between the fracture angles of the samples between 2.5 and 5. This provides more confidence in understanding the post-necking behaviour of small-scale tensile tests.
published_date	2023-02-09T13:03:40Z
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score	11.013731

Size Effect on the Post-Necking Behaviour of Dual-Phase 800 Steel: Modelling and Experiment

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