层合碳纤维复合材料拉胀超结构的力学行为研究

doi:10.11896/cldb.25020163

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Abstract Carbon fiber reinforced plastic (CFRP) auxetic meta-structures have attracted much attention in the aerospace field in recent years due to their advantages of light weight, high strength and designability. To reveal the basic mechanical behaviour of auxetic meta-structures made from laminated CFRP and their formation mechanism, two-dimensional anisotropic constitutive models of laminates and equivalent elastic mecha-nical models of re-entrant hexagonal auxetic meta-structures have been developed based on classical laminate theory and Euler-Bernoulli beam bending theory, respectively. Combined with the validated finite element method, the tensile, compressive and shear behaviour of the CFRP meta-cell were predicted. The results show that the in-plane tensile and compressive behaviours exhibit linear characteristics and have the same stiffness, but their strengths are different due to the different failure locations. Both the in-plane and out-of-plane shear behaviours are nonlinear, and the stiffnesses and strengths in different directions are significantly different due to the different deformation modes, material properties and failure modes. Microscopic failure modes of the sidewalls include matrix cracking, fiber pull-out and fiber fracture, but delamination damage induced by local fracture also occurs under out-of-plane shear conditions. Both in-plane tensile and out-of-plane shear show a negative Poisson’s ratio effect (with the effect being better for Y-direction tension), and the predicted Poisson’s ratios are close to the simulation results. The out-of-plane shear failure strain is about 150%, showing excellent synclastic behaviour and shear bearing capacity. These results can provide a reference for the functional application and controllable design of composite meta-structures.

Key words： metamaterial meta-structure negative Poisson’s ratio auxetic composite material finite element analysis

Published: 25 January 2026 Online: 2026-01-27

CLC number:	O34
	TB303
	TQ327

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	Articles by authors
	ZHAO Changfang
	Boris Nikitovich Fedulov
	LIU Hao

Cite this article:

ZHAO Changfang,Boris Nikitovich Fedulov,LIU Hao. Study on the Mechanical Behaviour of Auxetic Meta-structures Made from Laminated CFRP[J]. Materials Reports, 2026, 40(2): 25020163-10.

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https://www.mater-rep.com/EN/10.11896/cldb.25020163 OR https://www.mater-rep.com/EN/Y2026/V40/I2/25020163

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