Disordered auxetic metamaterials architected by random peanut-shaped perturbations

Previous discussions about perforated auxetic metamaterials primarily focused on the ordered systems with high degree of geometric symmetry. However, it is difficult to manufacture or retain the perfect auxetic systems in practical applications. In this paper, three types of disordered perforated au...

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Autores principales:	Hui Wang, Sihang Xiao, Jianshan Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Auxetic metamaterial Perforation Disordered system Tensile test Finite element simulation Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/00abeb6bb0714f4284a31fabc80b180b
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spelling	oai:doaj.org-article:00abeb6bb0714f4284a31fabc80b180b2021-12-02T04:59:01ZDisordered auxetic metamaterials architected by random peanut-shaped perturbations0264-127510.1016/j.matdes.2021.110291https://doaj.org/article/00abeb6bb0714f4284a31fabc80b180b2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521008467https://doaj.org/toc/0264-1275Previous discussions about perforated auxetic metamaterials primarily focused on the ordered systems with high degree of geometric symmetry. However, it is difficult to manufacture or retain the perfect auxetic systems in practical applications. In this paper, three types of disordered perforated auxetic systems including orientated disordered system, dimensional disordered system and complete-disordered system are explored thoroughly. The perforations of interest are oval holes which are advantageous in ensuring auxeticity, reducing stress level and improving material distribution. The designed disordered systems are fabricated by 3D printing technology and then are tested by the uniaxial tension to reveal their mechanical properties and verify the related finite element models. Thereafter, the evolution of mechanical properties of these disordered systems is investigated numerically for the varied perturbed geometric parameters such as the orientation and dimension of oval hole. The results reveal that the disordered systems still show great robustness in auxetic behavior, although the disorder in orientation and dimension exists. A high degree of symmetry in microstructure is not necessary for designing perforated auxetic systems. This provides a great convenience for the flexible and practicable design and application of perforated auxetic metamaterials.Hui WangSihang XiaoJianshan WangElsevierarticleAuxetic metamaterialPerforationDisordered systemTensile testFinite element simulationMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110291- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Auxetic metamaterial Perforation Disordered system Tensile test Finite element simulation Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Auxetic metamaterial Perforation Disordered system Tensile test Finite element simulation Materials of engineering and construction. Mechanics of materials TA401-492 Hui Wang Sihang Xiao Jianshan Wang Disordered auxetic metamaterials architected by random peanut-shaped perturbations
description	Previous discussions about perforated auxetic metamaterials primarily focused on the ordered systems with high degree of geometric symmetry. However, it is difficult to manufacture or retain the perfect auxetic systems in practical applications. In this paper, three types of disordered perforated auxetic systems including orientated disordered system, dimensional disordered system and complete-disordered system are explored thoroughly. The perforations of interest are oval holes which are advantageous in ensuring auxeticity, reducing stress level and improving material distribution. The designed disordered systems are fabricated by 3D printing technology and then are tested by the uniaxial tension to reveal their mechanical properties and verify the related finite element models. Thereafter, the evolution of mechanical properties of these disordered systems is investigated numerically for the varied perturbed geometric parameters such as the orientation and dimension of oval hole. The results reveal that the disordered systems still show great robustness in auxetic behavior, although the disorder in orientation and dimension exists. A high degree of symmetry in microstructure is not necessary for designing perforated auxetic systems. This provides a great convenience for the flexible and practicable design and application of perforated auxetic metamaterials.
format	article
author	Hui Wang Sihang Xiao Jianshan Wang
author_facet	Hui Wang Sihang Xiao Jianshan Wang
author_sort	Hui Wang
title	Disordered auxetic metamaterials architected by random peanut-shaped perturbations
title_short	Disordered auxetic metamaterials architected by random peanut-shaped perturbations
title_full	Disordered auxetic metamaterials architected by random peanut-shaped perturbations
title_fullStr	Disordered auxetic metamaterials architected by random peanut-shaped perturbations
title_full_unstemmed	Disordered auxetic metamaterials architected by random peanut-shaped perturbations
title_sort	disordered auxetic metamaterials architected by random peanut-shaped perturbations
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/00abeb6bb0714f4284a31fabc80b180b
work_keys_str_mv	AT huiwang disorderedauxeticmetamaterialsarchitectedbyrandompeanutshapedperturbations AT sihangxiao disorderedauxeticmetamaterialsarchitectedbyrandompeanutshapedperturbations AT jianshanwang disorderedauxeticmetamaterialsarchitectedbyrandompeanutshapedperturbations
_version_	1718400869410537472

Disordered auxetic metamaterials architected by random peanut-shaped perturbations

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