Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression
Uniaxial cyclic compression tests were performed to investigate the compression deformation and damage of polymer-bonded explosive (PBX) simulant, particularly shear localization. The macroscopic mechanical behavior and mesoscale failure mechanisms of the PBX simulant were analyzed by optical observ...
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MDPI AG
2024-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/4/919 |
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| author | Dong Jia Zhiming Hao Yunqiang Peng Shunping Yan Wenjun Hu |
| author_facet | Dong Jia Zhiming Hao Yunqiang Peng Shunping Yan Wenjun Hu |
| author_sort | Dong Jia |
| collection | DOAJ |
| description | Uniaxial cyclic compression tests were performed to investigate the compression deformation and damage of polymer-bonded explosive (PBX) simulant, particularly shear localization. The macroscopic mechanical behavior and mesoscale failure mechanisms of the PBX simulant were analyzed by optical observation and SEM scanning methods. After each cyclic compression, the specimen was scanned by X-ray computed tomography (CT), and the internal 3D deformation of the specimen was calculated using the digital volume correlation (DVC) method. The results show that the stress–strain curve of the PBX simulant exhibits five stages and coincides with the morphological changes on the surface of the specimen. The mesoscale failure mechanism is dominated by particle interface debonding and binder tearing, accompanied by a small amount of particle breakage. There are three bifurcation points (T<sub>1</sub>, T<sub>2</sub>, and T<sub>3</sub>) in the curves of the normal and shear strain components with compression strain. It was found that these bifurcation points can reflect the full progression of the specimen from inconspicuous damage to uniformly distributed damage, shear localization, and eventual macroscopic fracture. The strain invariant <i>I</i><sub>1</sub> can quantitatively and completely characterize the deformation and damage processes of the PBX simulant under cyclic compression. |
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| id | doaj.art-602b0345a7a14a78b1e673cfb9ec23bd |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-07T22:22:48Z |
| publishDate | 2024-02-01 |
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| spelling | doaj.art-602b0345a7a14a78b1e673cfb9ec23bd2024-02-23T15:25:47ZengMDPI AGMaterials1996-19442024-02-0117491910.3390/ma17040919Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic CompressionDong Jia0Zhiming Hao1Yunqiang Peng2Shunping Yan3Wenjun Hu4Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, ChinaInstitute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, ChinaInstitute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, ChinaInstitute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, ChinaInstitute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, ChinaUniaxial cyclic compression tests were performed to investigate the compression deformation and damage of polymer-bonded explosive (PBX) simulant, particularly shear localization. The macroscopic mechanical behavior and mesoscale failure mechanisms of the PBX simulant were analyzed by optical observation and SEM scanning methods. After each cyclic compression, the specimen was scanned by X-ray computed tomography (CT), and the internal 3D deformation of the specimen was calculated using the digital volume correlation (DVC) method. The results show that the stress–strain curve of the PBX simulant exhibits five stages and coincides with the morphological changes on the surface of the specimen. The mesoscale failure mechanism is dominated by particle interface debonding and binder tearing, accompanied by a small amount of particle breakage. There are three bifurcation points (T<sub>1</sub>, T<sub>2</sub>, and T<sub>3</sub>) in the curves of the normal and shear strain components with compression strain. It was found that these bifurcation points can reflect the full progression of the specimen from inconspicuous damage to uniformly distributed damage, shear localization, and eventual macroscopic fracture. The strain invariant <i>I</i><sub>1</sub> can quantitatively and completely characterize the deformation and damage processes of the PBX simulant under cyclic compression.https://www.mdpi.com/1996-1944/17/4/919polymer-bonded explosiveuniaxial cyclic compressioncomputed tomographydigital volume correlationshear localization |
| spellingShingle | Dong Jia Zhiming Hao Yunqiang Peng Shunping Yan Wenjun Hu Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression Materials polymer-bonded explosive uniaxial cyclic compression computed tomography digital volume correlation shear localization |
| title | Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression |
| title_full | Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression |
| title_fullStr | Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression |
| title_full_unstemmed | Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression |
| title_short | Experimental Study on the Localized Deformation and Damage Behavior of Polymer-Bonded Explosive Simulant under Cyclic Compression |
| title_sort | experimental study on the localized deformation and damage behavior of polymer bonded explosive simulant under cyclic compression |
| topic | polymer-bonded explosive uniaxial cyclic compression computed tomography digital volume correlation shear localization |
| url | https://www.mdpi.com/1996-1944/17/4/919 |
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