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Cementitious cellular composites with auxetic behavior. / Xu, Yading; Zhang, Hongzhi; Schlangen, Erik; Lukovic, Mladena; Šavija, Branko.

In: Cement and Concrete Composites, Vol. 111, 103624, 2020, p. 1-11.

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@article{06ccdfb26ff045039a0283aa05059131,
title = "Cementitious cellular composites with auxetic behavior",
abstract = "Auxetic behavior refers to material with negative Poisson's ratio. In this research, a new type of cementitious auxetic material is developed. A novel crack bridging auxetic mechanism is discovered which is in contrast with a local buckling mechanism commonly employed to trigger auxetic behavior. Taking advantage of 3D printing techniques, cementitious cellular composite (CCC) specimens with auxetic cellular structures were produced. Meanwhile, cementitious materials with different fiber content were used as constituent material. Uniaxial compression and cyclic loading tests were performed on the CCCs. Experiments show that with proper constituent material, CCCs can exhibit auxetic behavior which is induced by crack bridging process of the cementitious constituent material. In addition, strain hardening behavior can be identified in the stress-strain curve under uniaxial compression and consequently high specific energy absorption is obtained. Furthermore, 2.5% of reversible deformation which is significantly higher than conventional cementitious materials under cyclic loading is obtained within 25,000 cycles. Obvious fatigue damage is observed in the first 3000 cycles, afterwards signs of mechanical properties recovering can be found. The discovered auxetic mechanism indicates a new designing direction for brittle materials to achieve auxetic behaviors.",
keywords = "Auxetic material, Cementitious material, Cyclic loading, Negative Poisson's ratio",
author = "Yading Xu and Hongzhi Zhang and Erik Schlangen and Mladena Lukovic and Branko {\v S}avija",
year = "2020",
doi = "10.1016/j.cemconcomp.2020.103624",
language = "English",
volume = "111",
pages = "1--11",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Cementitious cellular composites with auxetic behavior

AU - Xu, Yading

AU - Zhang, Hongzhi

AU - Schlangen, Erik

AU - Lukovic, Mladena

AU - Šavija, Branko

PY - 2020

Y1 - 2020

N2 - Auxetic behavior refers to material with negative Poisson's ratio. In this research, a new type of cementitious auxetic material is developed. A novel crack bridging auxetic mechanism is discovered which is in contrast with a local buckling mechanism commonly employed to trigger auxetic behavior. Taking advantage of 3D printing techniques, cementitious cellular composite (CCC) specimens with auxetic cellular structures were produced. Meanwhile, cementitious materials with different fiber content were used as constituent material. Uniaxial compression and cyclic loading tests were performed on the CCCs. Experiments show that with proper constituent material, CCCs can exhibit auxetic behavior which is induced by crack bridging process of the cementitious constituent material. In addition, strain hardening behavior can be identified in the stress-strain curve under uniaxial compression and consequently high specific energy absorption is obtained. Furthermore, 2.5% of reversible deformation which is significantly higher than conventional cementitious materials under cyclic loading is obtained within 25,000 cycles. Obvious fatigue damage is observed in the first 3000 cycles, afterwards signs of mechanical properties recovering can be found. The discovered auxetic mechanism indicates a new designing direction for brittle materials to achieve auxetic behaviors.

AB - Auxetic behavior refers to material with negative Poisson's ratio. In this research, a new type of cementitious auxetic material is developed. A novel crack bridging auxetic mechanism is discovered which is in contrast with a local buckling mechanism commonly employed to trigger auxetic behavior. Taking advantage of 3D printing techniques, cementitious cellular composite (CCC) specimens with auxetic cellular structures were produced. Meanwhile, cementitious materials with different fiber content were used as constituent material. Uniaxial compression and cyclic loading tests were performed on the CCCs. Experiments show that with proper constituent material, CCCs can exhibit auxetic behavior which is induced by crack bridging process of the cementitious constituent material. In addition, strain hardening behavior can be identified in the stress-strain curve under uniaxial compression and consequently high specific energy absorption is obtained. Furthermore, 2.5% of reversible deformation which is significantly higher than conventional cementitious materials under cyclic loading is obtained within 25,000 cycles. Obvious fatigue damage is observed in the first 3000 cycles, afterwards signs of mechanical properties recovering can be found. The discovered auxetic mechanism indicates a new designing direction for brittle materials to achieve auxetic behaviors.

KW - Auxetic material

KW - Cementitious material

KW - Cyclic loading

KW - Negative Poisson's ratio

UR - http://www.scopus.com/inward/record.url?scp=85083078950&partnerID=8YFLogxK

U2 - 10.1016/j.cemconcomp.2020.103624

DO - 10.1016/j.cemconcomp.2020.103624

M3 - Article

VL - 111

SP - 1

EP - 11

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

M1 - 103624

ER -

ID: 72154830