Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption
The 2014 Mt. Ontake eruption in Japan highlighted the need for improved volcanic shelters. To contribute to their reinforcement, this study focuses on the energy absorption characteristics of pumice, particularly artificial pumice made from waste glass. Compression tests were conducted under unconfi...
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2025-06-01
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| author | Kohei Tateyama Kazuma Abe Hiroyuki Fujiki Hisashi Sasaki Hiroyuki Yamada |
| author_facet | Kohei Tateyama Kazuma Abe Hiroyuki Fujiki Hisashi Sasaki Hiroyuki Yamada |
| author_sort | Kohei Tateyama |
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| description | The 2014 Mt. Ontake eruption in Japan highlighted the need for improved volcanic shelters. To contribute to their reinforcement, this study focuses on the energy absorption characteristics of pumice, particularly artificial pumice made from waste glass. Compression tests were conducted under unconfined and oedometric conditions using a universal testing machine, drop-weight testing machine, and split Hopkinson bar across a wide strain rate range (10<sup>−3</sup> to 10<sup>2</sup> s<sup>−1</sup>). The deformation behavior was categorized into two types: one with a distinct initial peak followed by stress drop and another with a continuous transition to plateau deformation. Regardless of deformation type, the absorbed energy showed a positive dependence on strain rate. The average absorbed energy increased from approximately 1.6 MJ/m<sup>3</sup> at 10<sup>−3</sup> s<sup>−1</sup> to over 4.3 MJ/m<sup>3</sup> at 10<sup>2</sup> s<sup>−1</sup>. A simple predictive model was proposed to evaluate the energy absorption capacity of pumice reinforcement. The model’s predictions were in good agreement with experimental results for pumice layers up to 150 mm thick. These findings provide fundamental insights into the high strain rate behavior of artificial pumice and its potential application as a passive energy-absorbing material for impact-resistant volcanic shelters. |
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| language | English |
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| spelling | doaj-art-34eebcf8541b4e84829b38ad7f1bbf232025-08-20T03:27:26ZengMDPI AGApplied Mechanics2673-31612025-06-01624310.3390/applmech6020043Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic EruptionKohei Tateyama0Kazuma Abe1Hiroyuki Fujiki2Hisashi Sasaki3Hiroyuki Yamada4College of Design and Manufacturing Technology, Muroran Institute of Technology, 27-1 Mizumotocho, Muroran 050-8585, Hokkaido, JapanDivision of Information and Electronic Engineering, Muroran Institute of Technology, 27-1 Mizumotocho, Muroran 050-8585, Hokkaido, JapanCollege of Design and Manufacturing Technology, Muroran Institute of Technology, 27-1 Mizumotocho, Muroran 050-8585, Hokkaido, JapanAsia Air Survey Co., Ltd., Shinyuri 21 Building, 1-2-2 Manpukuji, Asao-ku, Kawasaki 215-0004, Kanagawa, JapanDepartment of Mechanical Engineering, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka 239-8686, Kanagawa, JapanThe 2014 Mt. Ontake eruption in Japan highlighted the need for improved volcanic shelters. To contribute to their reinforcement, this study focuses on the energy absorption characteristics of pumice, particularly artificial pumice made from waste glass. Compression tests were conducted under unconfined and oedometric conditions using a universal testing machine, drop-weight testing machine, and split Hopkinson bar across a wide strain rate range (10<sup>−3</sup> to 10<sup>2</sup> s<sup>−1</sup>). The deformation behavior was categorized into two types: one with a distinct initial peak followed by stress drop and another with a continuous transition to plateau deformation. Regardless of deformation type, the absorbed energy showed a positive dependence on strain rate. The average absorbed energy increased from approximately 1.6 MJ/m<sup>3</sup> at 10<sup>−3</sup> s<sup>−1</sup> to over 4.3 MJ/m<sup>3</sup> at 10<sup>2</sup> s<sup>−1</sup>. A simple predictive model was proposed to evaluate the energy absorption capacity of pumice reinforcement. The model’s predictions were in good agreement with experimental results for pumice layers up to 150 mm thick. These findings provide fundamental insights into the high strain rate behavior of artificial pumice and its potential application as a passive energy-absorbing material for impact-resistant volcanic shelters.https://www.mdpi.com/2673-3161/6/2/43impactballistic ejectavolcanic eruptionimpact-resistant designartificial pumice |
| spellingShingle | Kohei Tateyama Kazuma Abe Hiroyuki Fujiki Hisashi Sasaki Hiroyuki Yamada Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption Applied Mechanics impact ballistic ejecta volcanic eruption impact-resistant design artificial pumice |
| title | Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption |
| title_full | Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption |
| title_fullStr | Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption |
| title_full_unstemmed | Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption |
| title_short | Compressive Deformation Behavior of Artificial Pumice for Reinforcement of Existing Shelter Against Ballistic Ejecta of Volcanic Eruption |
| title_sort | compressive deformation behavior of artificial pumice for reinforcement of existing shelter against ballistic ejecta of volcanic eruption |
| topic | impact ballistic ejecta volcanic eruption impact-resistant design artificial pumice |
| url | https://www.mdpi.com/2673-3161/6/2/43 |
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