Experiments and parametric studies on 3D metallic auxetic metamaterials with tuneable mechanical properties

By X. Ren, Jianhu Shen, Arash Ghaedizadeh, Hongqi Tian, Yi Min Xie. 2015

207 citations recorded by the source corpus.

Auxetic metamaterials are synthetic materials with microstructures engineered to achieve negative Poisson’s ratios. Auxetic metamaterials are of great interest because of their unusual properties and various potential applications. However, most of the previous research has been focused on auxetic behaviour of elastomers under elastic deformation. Inspired by our recent finding of the loss of auxetic behaviour in metallic auxetic metamaterials, a systematic experimental and numerical investigation has been carried out to explore the mechanism behind this phenomenon. Using an improved methodology of generating buckling-induced auxetic metamaterials, several samples of metallic auxetic metamaterials have been fabricated using a 3D printing technique. The experiments on those samples have revealed the special features of auxetic behaviour for metallic auxetic metamaterials and proved the effectiveness of our structural modification. Parametric studies have been performed through experimentally validated finite element models to explore the auxetic performance of the designed metallic metamaterials. It is found that the auxetic performance can be tuned by the geometry of microstructures, and the strength and stiffness can be tuned by the plasticity of the base material while maintaining the auxetic performance.

Subfields: Mechanical Engineering, Pulmonary and Respiratory Medicine

View Paper: https://www.semanticscholar.org/paper/e57fbeb39b88ad19159f810456712cb2477eaf46

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In Mechanical Engineering

1. Yi Min Xie
2. X. Ren
3. Phuong N. U. Tran
4. Tuan Duc Ngo
5. Raj Das
6. Wei Peng
7. Wenwang Wu
8. Xiang Li

In Pulmonary and Respiratory Medicine

1. Phuong N. U. Tran
2. Yi Min Xie
3. Tuan Duc Ngo
4. X. Ren
5. Raj Das

Citations in the corpus

• Auxetic metamaterials and structures: a review (2018, methodology): “Metamaterials possess superior and unusual properties in the aspects of static modulus, density [7], energy absorption [8–10], acoustic and phononic performance [11–13], heat transport performance [14, 15], smart materials and negative Poisson’s ratio (NPR) [16, 17].”
• Generation of 3D representative volume elements for heterogeneous materials: A review (2018, background): “This can be compensated by incorporating different patterns of imperfections [518].”
• Systematic design of 3D auxetic lattice materials with programmable Poisson’s ratio for finite strains (2018, background): “[38] further studied the buckling-induced auxetic material patterns by fabricating them using metallic materials.”
• Auxetic mechanical metamaterials: from soft to stiff (2023, background): “Nonlinear structure buckling can trigger auxetic deformation behavior when rubber is used as the basic material, while no auxetic deformation behavior is observed when brass is used as the basic material [153].”