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Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete

This research examined the performance of functionally graded two-stage fibrous concrete (FTSFC) against modified repeated falling-mass impacts. This study led to the concept of creating improved multiphysics model of fibre composites with better impact resistance for potential protective constructi...

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Detalles Bibliográficos
Autores principales: Prasad, Nandhu, Murali, Gunasekaran, Vatin, Nikolai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510188/
https://www.ncbi.nlm.nih.gov/pubmed/34640230
http://dx.doi.org/10.3390/ma14195833
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author Prasad, Nandhu
Murali, Gunasekaran
Vatin, Nikolai
author_facet Prasad, Nandhu
Murali, Gunasekaran
Vatin, Nikolai
author_sort Prasad, Nandhu
collection PubMed
description This research examined the performance of functionally graded two-stage fibrous concrete (FTSFC) against modified repeated falling-mass impacts. This study led to the concept of creating improved multiphysics model of fibre composites with better impact resistance for potential protective constructions. FTSFC was developed based on the bio-inspiring strength of turtle shells. The excellent impact resistance of FTSFC was accomplished by including a larger quantity of steel and polypropylene fibres in the outer layers. At the same time, one- and two-layered concrete were cast and compared to evaluate the efficiency of three-layered FTSFC. To minimize the dispersed test results, a modified form of the 544 drop-mass impact test was recommended by the American Concrete Institute (ACI). The modification was a knife-edge notched specimen instead of a solid cylindrical specimen without a notch. This modification predefined a crack path and reduced the dispersion of results. Cracking and failure impact numbers, ductility index, and failure mode were the testing criteria. The suggested modification to the ACI impact test decreased the coefficient of variance, showing that the dispersion of test results was reduced significantly. This study led to the concept of creating improved, fibre composites with better impact resistance for potential protective constructions.
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spelling pubmed-85101882021-10-13 Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete Prasad, Nandhu Murali, Gunasekaran Vatin, Nikolai Materials (Basel) Article This research examined the performance of functionally graded two-stage fibrous concrete (FTSFC) against modified repeated falling-mass impacts. This study led to the concept of creating improved multiphysics model of fibre composites with better impact resistance for potential protective constructions. FTSFC was developed based on the bio-inspiring strength of turtle shells. The excellent impact resistance of FTSFC was accomplished by including a larger quantity of steel and polypropylene fibres in the outer layers. At the same time, one- and two-layered concrete were cast and compared to evaluate the efficiency of three-layered FTSFC. To minimize the dispersed test results, a modified form of the 544 drop-mass impact test was recommended by the American Concrete Institute (ACI). The modification was a knife-edge notched specimen instead of a solid cylindrical specimen without a notch. This modification predefined a crack path and reduced the dispersion of results. Cracking and failure impact numbers, ductility index, and failure mode were the testing criteria. The suggested modification to the ACI impact test decreased the coefficient of variance, showing that the dispersion of test results was reduced significantly. This study led to the concept of creating improved, fibre composites with better impact resistance for potential protective constructions. MDPI 2021-10-06 /pmc/articles/PMC8510188/ /pubmed/34640230 http://dx.doi.org/10.3390/ma14195833 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Prasad, Nandhu
Murali, Gunasekaran
Vatin, Nikolai
Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete
title Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete
title_full Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete
title_fullStr Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete
title_full_unstemmed Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete
title_short Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete
title_sort modified falling mass impact test performance on functionally graded two stage aggregate fibrous concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510188/
https://www.ncbi.nlm.nih.gov/pubmed/34640230
http://dx.doi.org/10.3390/ma14195833
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