Superelastic SMA Transformation Ratcheting Behavior 
Test and Macroscopic Phenomenological Constitutive 
Model Considering the Effect of Strain Amplitude

Yiming Liu; Zhangrui Liu

doi:10.70711/frim.v3i12.7878

Superelastic SMA Transformation Ratcheting Behavior Test and Macroscopic Phenomenological Constitutive Model Considering the Effect of Strain Amplitude

Yiming Liu, Zhangrui Liu

Abstract

This paper proposes an improved constitutive model for the transformation ratcheting behavior of superelastic shape memory alloys (SMA), based on experimental results and the limitations of the Graesser constitutive model. The model divides the hysteresis curve into
loading and unloading stages and introduces parameter evolution equations to describe the nonlinear evolution of parameters during cyclic
loading. MATLAB simulations verify the model's high-precision predictive capability under various strain amplitude conditions, providing
theoretical support for the development of SMA application theory.

Keywords

Superelastic Shape Memory Alloy (SMA); Transformation Ratcheting Behavior; Constitutive Model; Numerical Simulation

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References

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DOI: http://dx.doi.org/10.70711/frim.v3i12.7878

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