Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations

Fatih Usta; Halit S. Turkmen; Fabrizio Scarpa

doi:10.1109/RAST.2019.8767843

Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations

Fatih Usta, Halit S. Turkmen, Fabrizio Scarpa

Department of Aeronautical Engineering

University of Bristol

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

In this work we examine the impact behavior of single and doubly curved structures with auxetic cores by using numerical methods. We have evaluated twelve different doubly and one single curved panels impacted by a spherical projectile at a velocity of 100 m/s. The results are firstly discussed by considering the effects of the curvature on the backplane displacement and the energy absorption of the panels. A selected toroidal configuration is then modeled as sandwich structure with an auxetic (re-entrant)core and a spherical projectile is shot on different locations from center to edge. The sandwich structure is made by carbon fiber/epoxy laminates, while the reentrant core is represented with ABSplus plastic. It is found that the damaged area of the auxetic core differs from a traditional honeycomb under impact loading, and this is mainly due to its negative Poisson's ratio.

Original language	English
Title of host publication	Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019
Editors	S. Menekay, O. Cetin, O. Alparslan
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	25-28
Number of pages	4
ISBN (Electronic)	9781538694480
DOIs	https://doi.org/10.1109/RAST.2019.8767843
Publication status	Published - Jun 2019
Event	9th International Conference on Recent Advances in Space Technologies, RAST 2019 - Istanbul, Turkey Duration: 11 Jun 2019 → 14 Jun 2019

Publication series

Name	Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019

Conference

Conference	9th International Conference on Recent Advances in Space Technologies, RAST 2019
Country/Territory	Turkey
City	Istanbul
Period	11/06/19 → 14/06/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

Funding

ACKNOWLEDGMENT SupportforthisworkhasbeenprovidedbytheScientific and Technological Research Council of Turkey (TUBITAK) under Fellowship Number 2214-A with application number 1059B141800436 and by Istanbul Technical University ResearchFundundertheProjectNumber41414.

Funders	Funder number
Istanbul Technical University ResearchFundundertheProjectNumber41414
TUBITAK	1059B141800436
Technological Research Council of Turkey

Keywords

Auxetic materials
Doubly curved structures
Projectile impact
Sandwich panels

Access to Document

10.1109/RAST.2019.8767843

Cite this

Usta, F., Turkmen, H. S., & Scarpa, F. (2019). Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations. In S. Menekay, O. Cetin, & O. Alparslan (Eds.), Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019 (pp. 25-28). Article 8767843 (Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RAST.2019.8767843

Usta, Fatih ; Turkmen, Halit S. ; Scarpa, Fabrizio. / Toroidal sandwich panels with auxetic core under impact loads : Numerical simulations. Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019. editor / S. Menekay ; O. Cetin ; O. Alparslan. Institute of Electrical and Electronics Engineers Inc., 2019. pp. 25-28 (Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019).

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title = "Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations",

abstract = "In this work we examine the impact behavior of single and doubly curved structures with auxetic cores by using numerical methods. We have evaluated twelve different doubly and one single curved panels impacted by a spherical projectile at a velocity of 100 m/s. The results are firstly discussed by considering the effects of the curvature on the backplane displacement and the energy absorption of the panels. A selected toroidal configuration is then modeled as sandwich structure with an auxetic (re-entrant)core and a spherical projectile is shot on different locations from center to edge. The sandwich structure is made by carbon fiber/epoxy laminates, while the reentrant core is represented with ABSplus plastic. It is found that the damaged area of the auxetic core differs from a traditional honeycomb under impact loading, and this is mainly due to its negative Poisson's ratio.",

keywords = "Auxetic materials, Doubly curved structures, Projectile impact, Sandwich panels",

author = "Fatih Usta and Turkmen, {Halit S.} and Fabrizio Scarpa",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 9th International Conference on Recent Advances in Space Technologies, RAST 2019 ; Conference date: 11-06-2019 Through 14-06-2019",

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doi = "10.1109/RAST.2019.8767843",

language = "English",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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Usta, F, Turkmen, HS & Scarpa, F 2019, Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations. in S Menekay, O Cetin & O Alparslan (eds), Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019., 8767843, Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019, Institute of Electrical and Electronics Engineers Inc., pp. 25-28, 9th International Conference on Recent Advances in Space Technologies, RAST 2019, Istanbul, Turkey, 11/06/19. https://doi.org/10.1109/RAST.2019.8767843

Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations. / Usta, Fatih; Turkmen, Halit S.; Scarpa, Fabrizio.
Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019. ed. / S. Menekay; O. Cetin; O. Alparslan. Institute of Electrical and Electronics Engineers Inc., 2019. p. 25-28 8767843 (Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - In this work we examine the impact behavior of single and doubly curved structures with auxetic cores by using numerical methods. We have evaluated twelve different doubly and one single curved panels impacted by a spherical projectile at a velocity of 100 m/s. The results are firstly discussed by considering the effects of the curvature on the backplane displacement and the energy absorption of the panels. A selected toroidal configuration is then modeled as sandwich structure with an auxetic (re-entrant)core and a spherical projectile is shot on different locations from center to edge. The sandwich structure is made by carbon fiber/epoxy laminates, while the reentrant core is represented with ABSplus plastic. It is found that the damaged area of the auxetic core differs from a traditional honeycomb under impact loading, and this is mainly due to its negative Poisson's ratio.

AB - In this work we examine the impact behavior of single and doubly curved structures with auxetic cores by using numerical methods. We have evaluated twelve different doubly and one single curved panels impacted by a spherical projectile at a velocity of 100 m/s. The results are firstly discussed by considering the effects of the curvature on the backplane displacement and the energy absorption of the panels. A selected toroidal configuration is then modeled as sandwich structure with an auxetic (re-entrant)core and a spherical projectile is shot on different locations from center to edge. The sandwich structure is made by carbon fiber/epoxy laminates, while the reentrant core is represented with ABSplus plastic. It is found that the damaged area of the auxetic core differs from a traditional honeycomb under impact loading, and this is mainly due to its negative Poisson's ratio.

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Usta F, Turkmen HS, Scarpa F. Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations. In Menekay S, Cetin O, Alparslan O, editors, Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 25-28. 8767843. (Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019). doi: 10.1109/RAST.2019.8767843

Toroidal sandwich panels with auxetic core under impact loads: Numerical simulations

Abstract

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Keywords

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