Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design

This paper investigates the deformation mechanism and energy absorption behaviour of 316 L triply periodic minimal surface (TPMS) structures with uniform and graded wall thicknesses fabricated by the selective laser melting technique. The uniform P-surface TPMS structure presents a single-level stre...

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Autores principales:	Minting Zhong, Wei Zhou, Huifeng Xi, Yingjing Liang, Zhigang Wu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	triply periodic minimal surface selective laser melting 316 L stainless steel energy absorption deformation mechanism Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/ab9e3ebbef6049938e6e774d9865570c
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spelling	oai:doaj.org-article:ab9e3ebbef6049938e6e774d9865570c2021-11-11T17:50:40ZDouble-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design10.3390/ma142162621996-1944https://doaj.org/article/ab9e3ebbef6049938e6e774d9865570c2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6262https://doaj.org/toc/1996-1944This paper investigates the deformation mechanism and energy absorption behaviour of 316 L triply periodic minimal surface (TPMS) structures with uniform and graded wall thicknesses fabricated by the selective laser melting technique. The uniform P-surface TPMS structure presents a single-level stress plateau for energy absorption and a localized diagonal shear cell failure. A graded strategy was employed to break such localized geometrical deformation to improve the overall energy absorption and to provide a double-level function. Two segments with different wall thicknesses separated by a barrier layer were designed along the compression direction while keeping the same relative density as the uniform structure. The results show that the crushing of the cells of the graded P-surface TPMS structure occurs first within the thin segment and then propagates to the thick segment. The stress–strain response shows apparent double stress plateaus. The stress level and length of each plateau can be adjusted by changing the wall thickness and position of the barrier layer between the two segments. The total energy absorption of the gradient TPMS structure was also found slightly higher than that of the uniform TPMS counterparts. The gradient design of TPMS structures may find applications where the energy absorption requires a double-level feature or a warning function.Minting ZhongWei ZhouHuifeng XiYingjing LiangZhigang WuMDPI AGarticletriply periodic minimal surfaceselective laser melting316 L stainless steelenergy absorptiondeformation mechanismTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6262, p 6262 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	triply periodic minimal surface selective laser melting 316 L stainless steel energy absorption deformation mechanism Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	triply periodic minimal surface selective laser melting 316 L stainless steel energy absorption deformation mechanism Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Minting Zhong Wei Zhou Huifeng Xi Yingjing Liang Zhigang Wu Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design
description	This paper investigates the deformation mechanism and energy absorption behaviour of 316 L triply periodic minimal surface (TPMS) structures with uniform and graded wall thicknesses fabricated by the selective laser melting technique. The uniform P-surface TPMS structure presents a single-level stress plateau for energy absorption and a localized diagonal shear cell failure. A graded strategy was employed to break such localized geometrical deformation to improve the overall energy absorption and to provide a double-level function. Two segments with different wall thicknesses separated by a barrier layer were designed along the compression direction while keeping the same relative density as the uniform structure. The results show that the crushing of the cells of the graded P-surface TPMS structure occurs first within the thin segment and then propagates to the thick segment. The stress–strain response shows apparent double stress plateaus. The stress level and length of each plateau can be adjusted by changing the wall thickness and position of the barrier layer between the two segments. The total energy absorption of the gradient TPMS structure was also found slightly higher than that of the uniform TPMS counterparts. The gradient design of TPMS structures may find applications where the energy absorption requires a double-level feature or a warning function.
format	article
author	Minting Zhong Wei Zhou Huifeng Xi Yingjing Liang Zhigang Wu
author_facet	Minting Zhong Wei Zhou Huifeng Xi Yingjing Liang Zhigang Wu
author_sort	Minting Zhong
title	Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design
title_short	Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design
title_full	Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design
title_fullStr	Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design
title_full_unstemmed	Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design
title_sort	double-level energy absorption of 3d printed tpms cellular structures via wall thickness gradient design
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ab9e3ebbef6049938e6e774d9865570c
work_keys_str_mv	AT mintingzhong doublelevelenergyabsorptionof3dprintedtpmscellularstructuresviawallthicknessgradientdesign AT weizhou doublelevelenergyabsorptionof3dprintedtpmscellularstructuresviawallthicknessgradientdesign AT huifengxi doublelevelenergyabsorptionof3dprintedtpmscellularstructuresviawallthicknessgradientdesign AT yingjingliang doublelevelenergyabsorptionof3dprintedtpmscellularstructuresviawallthicknessgradientdesign AT zhigangwu doublelevelenergyabsorptionof3dprintedtpmscellularstructuresviawallthicknessgradientdesign
_version_	1718432018734252032

Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall Thickness Gradient Design

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