Effect of Gradient Mode on Mechanical Properties of Miura-ori Metamaterials

doi:10.12382/bgxb.2022.0883

Abstract

Abstract:

Miura-ori metamaterials are lightweight and porous structures whose mechanical properties are often determined by their folding modes and geometries. Their mechanical responses can be modified by geometric design. Therefore, Miura-ori metamaterial is a metamaterial with multifunctional, adjustable and spatially diverse design. In order to study the effects of thickness gradient (TG) mode and acute gradient mode on the energy absorption capacity of metamaterials, the mechanical properties of metamaterials were analyzed parametrically using the finite element software. The results show that the metamaterials with negative TG have better energy absorption capability, and the average force and energy absorption of metamaterials with negative TG are better than those with the acute gradient.

Key words: Miura-ori metamaterial, gradient mode, thickness gradient, finite element analysis, mechanical property

CLC Number:

TU318

XIANG Xinmei, LUO Linlin, FU Zushu, HE Shizhu. Effect of Gradient Mode on Mechanical Properties of Miura-ori Metamaterials[J]. Acta Armamentarii, 2024, 45(2): 618-627.

Figures/Tables 12

Fig.1 Ori1 metamaterial

Fig.2 Folding unit of Miura-ori metamaterial

Fig.3 The metamaterials with four different thickness gradient modes

Fig.4 Comparison of real and nominal stress-strain curves

Table 1 Deformations of metamaterials with different thickness gradients

Fig.5 Force-displacement curves of gradient metamaterials with different thickness gradients

Fig.6 Comparison of PCF and Fm of metamaterials with different thickness gradients

Table 2 Parameters of metamaterials with acute gradients

梯度类型	超材料编号	从上到下各单元层锐角/(°)	梯度间隔
	Ori2_(56-64)_2	56,58,60,62,64,64,62,60,58,56	2.0
Ori2	Ori2_(51-67)_4	51,55,59,63,67,67,63,59,56,51	4.0
	Ori2_(46-70)_6	46,52,58,64,70,70,64,58,52,46	6.0
	Ori3_(57-64)_3.5	57,60.5,64,60.5,57,57,60.5,64,60.5,57	3.5
Ori3	Ori3_(55-66)_5.5	55,60.5,66,60.5,55,55,60.5,66,60.5,55	5.5
	Ori3_(53-68)_7.5	53,60.5,68,60.5,53,53,60.5,68,60.5,53	7.5
	Ori4_(56-64)_2	64,62,60,58,56,56,58,60,62,64	2.0
Ori4	Ori4_(51-67)_4	67,63,59,56,51,51,55,59,63,67	4.0
	Ori4_(46-70)_6	70,64,58,52,46,46,52,58,64,70	6.0
	Ori5_(55-63)_4	63,59,55,59,63,63,59,55,59,63	4.0
Ori5	Ori5_(53-64)_5.5	64,58.5,53,58.5,64,64,58.5,53,58.5,64	5.5
	Ori5_(51-65)_7	65,58,51,58,65,65,58,51,58,65	7.0

Table 3 Comparison of the deformations of metamaterials with different gradient modes

Fig.7 Force-displacement curves of metamaterials with different gradient modes

Fig.8 Comparison of PCF and Fm for the metamaterials with different gradient modes

Fig.9 Comparison of AEs for the metamaterials with different gradient modes

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