基于有限元计算的形状记忆合金⁃金属玻璃复合材料变形行为

doi:10.13229/j.cnki.jdxbgxb20190869

Abstract

Abstract:

The influence of tensile-unloading pre-strains on the mechanical behavior of shape memory alloy-metal glass composites and its internal mechanism were studied by finite element simulations. Simulation results show that both the yield strength and the limit of the elastic strain of the composites increase with the pretreatment strain， but the tensile ductility decreases sharply. With increasing pretreatment strain， the subsequent deformation of shape memory alloy particles shifts from a classic martensite phase transformation to a continuous martensite transformation， and finally to a simple martensite elastic deformation. The weakening or even disappearance of the phase transformation effect leads directly to the deterioration in the tensile performance of the pretreated shape memory alloy-metallic glass matrix composite.

Key words: composite materials, metallic glass, shape memory alloy, martensite phase transformation, pretreatment, finite element method

CLC Number:

TB331

Fan YANG,Xu-dong ZHANG,Meng ZHAO,Bo SHE,Jun-kai DENG. Deformation behavior of shape memory alloy-metallic glass matrix composites based on finite element calculations[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(1): 172-180.

Figures/Tables 16

Fig.1

Fig.2

Table 1

Material coefficients for MG matrix"

材料参数	数值
初始自由体积 $v 0$ 弹性模量 $E$ /MPa	0.05 95 000
泊松比 $v$	0.33
原子跳跃次数 $n D$	3
几何系数 $α$	0.21
原子体积比 $β$	1
参考应力 $σ 0$ /MPa	89

Table 1

Table 2

Material coefficients for SMA particles"

材料参数	数值
奥氏体弹性模量 $E A$ /MPa	65 000
马氏体弹性模量 $E M$ /MPa	30 000
马氏体相变起始应力 $σ s A M$ /MPa	450
马氏体相变结束应力 $σ f A M$ /MPa	1 000
逆相变起始应力 $σ s M A$ /MPa	500
逆相变结束应力 $σ f M A$ /MPa	50
相变应变 $ε L$	0.045

Table 2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

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Fig.13

Fig.14

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Deformation behavior of shape memory alloy-metallic glass matrix composites based on finite element calculations

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