Three-dimensional composites with nearly isotropic negative Poisson's ratio by random inclusions: Experiments and finite element simulation

Zhang, Minglonghai; Hu, Hong; Kamrul, Hasan Md.; Zhao, Sujing; Chang, Yuping; Ho, Mabel Mei-po; Karim, Nazmul

doi:10.1016/j.compscitech.2021.109195

Cited by 12 publications

(10 citation statements)

References 33 publications

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“…For impact energy between 60 and 100 J, comparing the energy absorption performance between the A1 and A2 composites with the same number of inclusions, it can be found that the A1 samples always have better energy absorption performances than the A2 samples. This phenomenon is expected because when the A1 samples are under loading the inward deformation of the inclusion will provide contraction behavior of the overall composite, 39 so that the A1 samples exhibit auxetic effect. However, for A2 samples, the inward deformations of the inclusions are too small to provide enough contraction of the composite to exhibit auxetic effect.…”

Section: Resultsmentioning

confidence: 99%

“…composite samples have higher moduli than A3 sample and more inclusions can result in higher moduli of the composite as demonstrated in Ref. 39. However, the load variation trends of A1-600 and A2-600 are different from all other samples due to the different deformation behaviors.…”

Section: Impact Load-time Curvesmentioning

confidence: 86%

“…This research investigates the low‐velocity impact response of 3D auxetic composite with nearly isotropic PR by embedding re‐entrant triangle inclusions, which was developed in our previous research, 39 through drop weight low‐velocity impact test. As one of the most widely adopted testing methods for measuring the dynamic response of the materials, the drop weight low‐velocity impact test can help to understand the dynamic deformation and impact resistance of the composite.…”

Section: Introductionmentioning

confidence: 99%

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Low velocity impact performance of 3D auxetic composites embedded with re‐entrant triangle inclusions

Zhang

2023

Polymer Composites

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This paper reports the low‐velocity impact performance of 3D auxetic composite embedded with re‐entrant triangle inclusions by both experiments and finite element (FE) simulations. Both auxetic and non‐auxetic samples were manufactured by embedding inclusions made from carbon fiber/epoxy laminates into silicone rubber matrix. The pure silicone rubber was also manufactured for comparison. All samples were subjected to low‐velocity impact with an impact energy of 147 J and an impact speed of 5.42 m/s and their impact load‐time and energy‐time curves were compared between the experimental results and FE simulation. The impact performances under different impact energies from 60 to 120 J were further investigated based on the validated FE models. The results show that the auxetic composites show better energy absorption capacity and impact resistance than non‐auxetic composites with the same number of inclusions at all energy levels. More inclusions can result in better impact resistance of auxetic composites when the impact energy is under 120 J. The auxetic composites possess 10% higher crash efficiency than non‐auxetic samples. The embedding of inclusions leads to easier damage of the composite under impact energy of 147 J. The research provides a better understanding on the impact performance of auxetic composites made from random inclusions.

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Section: Resultsmentioning

confidence: 99%

Section: Impact Load-time Curvesmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Low velocity impact performance of 3D auxetic composites embedded with re‐entrant triangle inclusions

Zhang

2023

Polymer Composites

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“…In addition, the experimental research of NPR materials has also made certain progress, such as randomly embedding rigid reentrant equilateral triangle inclusions into soft matrix, so that the anisotropic NPR composites are transformed nonisotropically. 67 The flexible piezoelectric energy harvester based on NPR graphene macro-film also showed better electrical output performance. 68 Therefore, Janus penta-C 2 B 2 Al 2 and Janus penta-Si 2 C 2 N 2 will be very promising for future applications in the field of micronano electronics.…”

mentioning

confidence: 99%

“…Compared with the currently discovered 2D materials with NPRs in only a few directions, including B 4 N (−0.03), Ag 2 S (−0.12), penta-graphene (−0.07), penta-B 2 N 4 (−0.02), and penta-C 4 P 2 (−0.08), this reflects superior advantages. In addition, the experimental research of NPR materials has also made certain progress, such as randomly embedding rigid re-entrant equilateral triangle inclusions into soft matrix, so that the anisotropic NPR composites are transformed nonisotropically . The flexible piezoelectric energy harvester based on NPR graphene macro-film also showed better electrical output performance .…”

mentioning

confidence: 99%

Pentagonal C_mX_nY_6–m–n (m = 2, 3; n = 1, 2; X, Y = B, N, Al, Si, P) Monolayers: Janus Ternaries Combine Omnidirectional Negative Poisson Ratios with Giant Piezoelectric Effects

Zhang

et al. 2023

J. Phys. Chem. Lett.

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Two-dimensional (2D) materials composed of pentagon and Janus motifs usually exhibit unique mechanical and electronic properties. In this work, a class of ternary carbonbased 2D materials, C m X n Y 6−m−n (m = 2, 3; n = 1, 2; X, Y = B, N, Al, Si, P), are systematically studied by first-principles calculations. Six of 21 Janus penta-C m X n Y 6−m−n monolayers are dynamically and thermally stable. The Janus penta-C 2 B 2 Al 2 and Janus penta-Si 2 C 2 N 2 exhibit auxeticity. More strikingly, Janus penta-Si 2 C 2 N 2 exhibits an omnidirectional negative Poisson ratio (NPR) with values ranging from −0.13 to −0.15; in other words, it is auxetic under stretch in any direction. The calculations of piezoelectricity reveal that the out-of-plane piezoelectric strain coefficient (d 32 ) of Janus panta-C 2 B 2 Al 2 is up to 0.63 pm/V and increases to 1 pm/V after a strain engineering. These omnidirectional NPR, giant piezoelectric coefficients endow the Janus pentagonal ternary carbonbased monolayers as potential candidates in the future nanoelectronics, especially in the electromechanical devices.

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Low‐velocity impact response of 3D carbon fiber reinforced polymer auxetic lattice structures

Zhang,

Li,

et al. 2024

Polymer Composites

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In this paper, low‐velocity impact properties and impact damage responses of a novel type of 3D hybrid auxetic structures made from carbon fiber‐reinforced polymer (CFRP) laminates were investigated experimentally and numerically. The structures were first fabricated with three different rib's width ratios t1/t0, and then impacted with three different impact energies of 30, 40, and 50 J using a drop tower impact system equipped with a cylindrical impactor. The finite element (FE) models were built in ABAQUS/Explicit, and the Hashin criteria were applied to predict the failure of the structures. The contact force histories, energy histories, displacements, and failure modes were compared between the experiment and FE simulation at all three impact energy levels. The failure morphologies and mechanisms were obtained and studied. The impact testing results suggest that the 3D auxetic structure with a higher t1/t0 ratio can lead to higher peak contact force and sustain higher impact energy. The failure of the structure starts from the middle area and propagates to the upper and lower areas. This research provides a better understanding of the impact responses and failure modes of the 3D auxetic lattice structure, which can promote the potential applications of the auxetic materials.Highlights Drop weight low‐velocity impact responses of 3D novel hybrid auxetic lattice structures are investigated through both experiment and finite element simulation. The effects of structural parameters on the impact performance of the 3D auxetic structures at different impact energy levels are analyzed. The failure morphologies and mechanisms of the 3D auxetic structures are studied.

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Three-dimensional composites with nearly isotropic negative Poisson's ratio by random inclusions: Experiments and finite element simulation

Cited by 12 publications

References 33 publications

Low velocity impact performance of 3D auxetic composites embedded with re‐entrant triangle inclusions

Low velocity impact performance of 3D auxetic composites embedded with re‐entrant triangle inclusions

Pentagonal C_mX_nY_6–m–n (m = 2, 3; n = 1, 2; X, Y = B, N, Al, Si, P) Monolayers: Janus Ternaries Combine Omnidirectional Negative Poisson Ratios with Giant Piezoelectric Effects

Low‐velocity impact response of 3D carbon fiber reinforced polymer auxetic lattice structures

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Three-dimensional composites with nearly isotropic negative Poisson's ratio by random inclusions: Experiments and finite element simulation

Cited by 12 publications

References 33 publications

Low velocity impact performance of 3D auxetic composites embedded with re‐entrant triangle inclusions

Low velocity impact performance of 3D auxetic composites embedded with re‐entrant triangle inclusions

Pentagonal CmXnY6–m–n (m = 2, 3; n = 1, 2; X, Y = B, N, Al, Si, P) Monolayers: Janus Ternaries Combine Omnidirectional Negative Poisson Ratios with Giant Piezoelectric Effects

Low‐velocity impact response of 3D carbon fiber reinforced polymer auxetic lattice structures

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Product

Resources

About

Pentagonal C_mX_nY_6–m–n (m = 2, 3; n = 1, 2; X, Y = B, N, Al, Si, P) Monolayers: Janus Ternaries Combine Omnidirectional Negative Poisson Ratios with Giant Piezoelectric Effects