Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar

In this study, a total of 30 3D re-entrant honeycomb specimens made of polyamide were fabricated with various configurations by using the additive manufacturing (AM) technique. Split Hopkinson Pressure Bar (SHPB) tests were conducted on the RH specimens at different impact velocities. The incident,...

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Autores principales:	Jiangping Chen, Weijun Tao, Shumeng Pang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	SHPB impact test 3D re-entrant honeycomb additive manufacturing dynamic response energy absorption Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/8e6fbf1e25b6499a8bb7a6b2edd8ffbb
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spelling	oai:doaj.org-article:8e6fbf1e25b6499a8bb7a6b2edd8ffbb2021-11-11T14:59:56ZImpact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar10.3390/app112198822076-3417https://doaj.org/article/8e6fbf1e25b6499a8bb7a6b2edd8ffbb2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9882https://doaj.org/toc/2076-3417In this study, a total of 30 3D re-entrant honeycomb specimens made of polyamide were fabricated with various configurations by using the additive manufacturing (AM) technique. Split Hopkinson Pressure Bar (SHPB) tests were conducted on the RH specimens at different impact velocities. The incident, reflected and transmitted waveforms can well explain the wave propagation and energy absorption characteristics of the specimens, which can help us to understand and analyse the process of impact loading. The stress–strain curves, energy absorption ability and failure modes of SHPB tests with different impact velocities and quasi-static compression tests were analysed and compared, and it was found that the flow stress and energy absorption ability of the specimens subjected to impact load were much improved. Among the tested specimens, specimen C2, with a smaller re-entrant angle <i>θ</i>, displayed the best energy absorption ability, which was 1.701 J/cm<sup>3</sup> at the impact velocity of 22 m/s and was 5.1 times that in the quasi-static test. Specimen C5 had the longest horizontal length of the diagonal bar <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>L</mi><mn>0</mn></msub></mrow></semantics></math></inline-formula>, and its energy absorption was 1.222 J/cm<sup>3</sup> at the impact velocity of 22 m/s and was 15.7 times that in the quasi-static test, reflecting the superiority of a structurally stable specimen in energy absorption under impact loading. The test results can provide a reference for the optimization of the design of the same or similar structures.Jiangping ChenWeijun TaoShumeng PangMDPI AGarticleSHPB impact test3D re-entrant honeycombadditive manufacturingdynamic responseenergy absorptionTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9882, p 9882 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	SHPB impact test 3D re-entrant honeycomb additive manufacturing dynamic response energy absorption Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	SHPB impact test 3D re-entrant honeycomb additive manufacturing dynamic response energy absorption Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Jiangping Chen Weijun Tao Shumeng Pang Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar
description	In this study, a total of 30 3D re-entrant honeycomb specimens made of polyamide were fabricated with various configurations by using the additive manufacturing (AM) technique. Split Hopkinson Pressure Bar (SHPB) tests were conducted on the RH specimens at different impact velocities. The incident, reflected and transmitted waveforms can well explain the wave propagation and energy absorption characteristics of the specimens, which can help us to understand and analyse the process of impact loading. The stress–strain curves, energy absorption ability and failure modes of SHPB tests with different impact velocities and quasi-static compression tests were analysed and compared, and it was found that the flow stress and energy absorption ability of the specimens subjected to impact load were much improved. Among the tested specimens, specimen C2, with a smaller re-entrant angle <i>θ</i>, displayed the best energy absorption ability, which was 1.701 J/cm<sup>3</sup> at the impact velocity of 22 m/s and was 5.1 times that in the quasi-static test. Specimen C5 had the longest horizontal length of the diagonal bar <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>L</mi><mn>0</mn></msub></mrow></semantics></math></inline-formula>, and its energy absorption was 1.222 J/cm<sup>3</sup> at the impact velocity of 22 m/s and was 15.7 times that in the quasi-static test, reflecting the superiority of a structurally stable specimen in energy absorption under impact loading. The test results can provide a reference for the optimization of the design of the same or similar structures.
format	article
author	Jiangping Chen Weijun Tao Shumeng Pang
author_facet	Jiangping Chen Weijun Tao Shumeng Pang
author_sort	Jiangping Chen
title	Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar
title_short	Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar
title_full	Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar
title_fullStr	Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar
title_full_unstemmed	Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar
title_sort	impact testing of 3d re-entrant honeycomb polyamide structure using split hopkinson pressure bar
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8e6fbf1e25b6499a8bb7a6b2edd8ffbb
work_keys_str_mv	AT jiangpingchen impacttestingof3dreentranthoneycombpolyamidestructureusingsplithopkinsonpressurebar AT weijuntao impacttestingof3dreentranthoneycombpolyamidestructureusingsplithopkinsonpressurebar AT shumengpang impacttestingof3dreentranthoneycombpolyamidestructureusingsplithopkinsonpressurebar
_version_	1718437908740833280

Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar

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