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Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading

Experimental and theoretical investigations on the failure behaviors of projectile during high-speed impact into concrete slabs were performed in this study. The ogive-nose projectiles after impact experiments were recovered and their microstructures were observed by scanning electron microscope and...

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Autores principales: Li, Zhao, Xu, Xiangzhao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7731412/
https://www.ncbi.nlm.nih.gov/pubmed/33256136
http://dx.doi.org/10.3390/ma13235372
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author Li, Zhao
Xu, Xiangzhao
author_facet Li, Zhao
Xu, Xiangzhao
author_sort Li, Zhao
collection PubMed
description Experimental and theoretical investigations on the failure behaviors of projectile during high-speed impact into concrete slabs were performed in this study. The ogive-nose projectiles after impact experiments were recovered and their microstructures were observed by scanning electron microscope and metallographic microscope. Mass abrasion and nose blunting are the typical failure models of steel projectile. Furthermore, thermal melting and cutting are the two main failure mechanisms. Based on the microscopic experimental results, a theoretical model of ogive-nose projectile subjected to impact loading considering the melting and cutting mechanisms was proposed. A modified cap model is introduced for describing the failure behavior of concrete targets, and then the dynamic cavity expansion theory is used to determine the resistance of projectiles during penetration. Besides, combining with the two-dimensional heat conduction equation and abrasive wear theory, the two main abrasion mechanisms of melting and cutting are included in the proposed model, which breaks through the framework of previous abrasion models with single abrasion mechanism. The predicted results of the present abrasion model are in good agreement with the experimental data, which indicates that the proposed model can effectively predict the failure behavior and penetration performance parameters of high-speed projectiles during penetration into concrete targets, such as mass loss, nose blunting, and depth of penetration.
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spelling pubmed-77314122020-12-12 Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading Li, Zhao Xu, Xiangzhao Materials (Basel) Article Experimental and theoretical investigations on the failure behaviors of projectile during high-speed impact into concrete slabs were performed in this study. The ogive-nose projectiles after impact experiments were recovered and their microstructures were observed by scanning electron microscope and metallographic microscope. Mass abrasion and nose blunting are the typical failure models of steel projectile. Furthermore, thermal melting and cutting are the two main failure mechanisms. Based on the microscopic experimental results, a theoretical model of ogive-nose projectile subjected to impact loading considering the melting and cutting mechanisms was proposed. A modified cap model is introduced for describing the failure behavior of concrete targets, and then the dynamic cavity expansion theory is used to determine the resistance of projectiles during penetration. Besides, combining with the two-dimensional heat conduction equation and abrasive wear theory, the two main abrasion mechanisms of melting and cutting are included in the proposed model, which breaks through the framework of previous abrasion models with single abrasion mechanism. The predicted results of the present abrasion model are in good agreement with the experimental data, which indicates that the proposed model can effectively predict the failure behavior and penetration performance parameters of high-speed projectiles during penetration into concrete targets, such as mass loss, nose blunting, and depth of penetration. MDPI 2020-11-26 /pmc/articles/PMC7731412/ /pubmed/33256136 http://dx.doi.org/10.3390/ma13235372 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Zhao
Xu, Xiangzhao
Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading
title Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading
title_full Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading
title_fullStr Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading
title_full_unstemmed Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading
title_short Theoretical Investigation on Failure Behavior of Ogive-Nose Projectile Subjected to Impact Loading
title_sort theoretical investigation on failure behavior of ogive-nose projectile subjected to impact loading
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7731412/
https://www.ncbi.nlm.nih.gov/pubmed/33256136
http://dx.doi.org/10.3390/ma13235372
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