TY - JOUR
T1 - Three-dimensional composites with nearly isotropic negative Poisson's ratio by random inclusions
T2 - Experiments and finite element simulation
AU - Zhang, Minglonghai
AU - Hu, Hong
AU - Kamrul, Hasan
AU - Zhao, Shuaiquan
AU - Chang, Yuping
AU - Ho, Mabel
AU - Karim, Nazmul
N1 - Funding Information:
This work was supported by the Hong Kong PhD Fellowship Scheme from the Research Grants Council of Hong Kong Special Administrative Region Government. The authors would like to acknowledge help from the Industrial Centre of the Hong Kong Polytechnic University. The authors would like to thank the funding support from the Research Grants Council of Hong Kong Special Administrative Region Government for the NSFC/RGC Joint Research Scheme (Grant number: N_PolyU516/20).
Funding Information:
This work was supported by the Hong Kong PhD Fellowship Scheme from the Research Grants Council of Hong Kong Special Administrative Region Government. The authors would like to acknowledge help from the Industrial Centre of the Hong Kong Polytechnic University . The authors would like to thank the funding support from the Research Grants Council of Hong Kong Special Administrative Region Government for the NSFC/RGC Joint Research Scheme (Grant number: N_PolyU516/20 ).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/2/8
Y1 - 2022/2/8
N2 - Composites with negative Poisson's Ratio (NPR), also known as auxetic composites, are of great interests due to excellent properties. Auxetic composites of various types have been developed, however most of them have anisotropic NPR behaviour. This paper reports a new type of three-dimensional (3D) composites with nearly isotropic NPR by randomly embedding rigid re-entrant equilateral triangle inclusions into soft matrix. Four types of inclusions with different structural parameters including re-entrant angle, prism length and rib thickness were first made from two types of carbon fibre prepregs, and then embedded into silicone rubber matrix with different inclusion numbers to fabricate 3D composites with various volume fractions of inclusions. Both experimental and finite element analyses were conducted to investigate the deformation behaviours under compression and the effects of different structural parameters and materials. The results show that the NPR of the composites can be realised with suitable structural parameters and properties. The lowest NPR of −0.19 was obtained via embedding 6 mm length inclusions made of one-layer 3K twill weave carbon fibre prepreg with an inclusion number of 800. The study provides a new approach for the development of 3D composites with isotropic NPR for the practical applications of auxetic materials.
AB - Composites with negative Poisson's Ratio (NPR), also known as auxetic composites, are of great interests due to excellent properties. Auxetic composites of various types have been developed, however most of them have anisotropic NPR behaviour. This paper reports a new type of three-dimensional (3D) composites with nearly isotropic NPR by randomly embedding rigid re-entrant equilateral triangle inclusions into soft matrix. Four types of inclusions with different structural parameters including re-entrant angle, prism length and rib thickness were first made from two types of carbon fibre prepregs, and then embedded into silicone rubber matrix with different inclusion numbers to fabricate 3D composites with various volume fractions of inclusions. Both experimental and finite element analyses were conducted to investigate the deformation behaviours under compression and the effects of different structural parameters and materials. The results show that the NPR of the composites can be realised with suitable structural parameters and properties. The lowest NPR of −0.19 was obtained via embedding 6 mm length inclusions made of one-layer 3K twill weave carbon fibre prepreg with an inclusion number of 800. The study provides a new approach for the development of 3D composites with isotropic NPR for the practical applications of auxetic materials.
KW - Auxetic composite
KW - B. Mechanical properties
KW - C. Deformation C. finite element analysis
UR - http://www.scopus.com/inward/record.url?scp=85120654519&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2021.109195
DO - 10.1016/j.compscitech.2021.109195
M3 - Journal article
AN - SCOPUS:85120654519
SN - 0266-3538
VL - 218
JO - Composites Science and Technology
JF - Composites Science and Technology
M1 - 109195
ER -