Experimental Investigation and Finite Element Analysis of the Mechanical Properties of NiTi Shape Memory Alloy Bars Under Diverse Heat Treatment Conditions

YUAN Zhen

doi:10.3724/j.gyjzG24101101

Volume 55 Issue 4

Apr. 2025

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YUAN Zhen. Experimental Investigation and Finite Element Analysis of the Mechanical Properties of NiTi Shape Memory Alloy Bars Under Diverse Heat Treatment Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(4): 187-196. doi: 10.3724/j.gyjzG24101101

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YUAN Zhen. Experimental Investigation and Finite Element Analysis of the Mechanical Properties of NiTi Shape Memory Alloy Bars Under Diverse Heat Treatment Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(4): 187-196. doi: 10.3724/j.gyjzG24101101

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Experimental Investigation and Finite Element Analysis of the Mechanical Properties of NiTi Shape Memory Alloy Bars Under Diverse Heat Treatment Conditions

doi: 10.3724/j.gyjzG24101101

YUAN Zhen

China Railway Chang'an Heavy Industry Co., Ltd., Xi'an 710032, China

Received Date: 2024-10-11
Available Online: 2025-06-07
Publish Date: 2025-04-01

Abstract

Abstract

To improve the mechanical properties of large-diameter NiTi shape memory alloy （SMA） bars， six groups of SMA bars under different heat treatment conditions were designed for constant incremental strain cyclic loading. The stress-strain curves， cumulative energy consumption， residual deformation， secant stiffness， and other mechanical property indicators of the SMA bars were obtained， and a constitutive model of the SMA bars was proposed. The results showed that with the increase of heat treatment temperature， both the residual strain and maximum strain of the SMA bars increased. Under the same loading displacement， the lower the heat treatment temperature， the higher the strain of the SMA bars. When the heat treatment temperature was constant， with the increase of heating time， the residual deformation of SMA gradually increased. When the heat treatment temperature reached 400 °C and the heating time reached 15 minutes， the mechanical properties of the SMA bars were optimal. Furthermore， finite element analysis was conducted on a steel beam-column joint equipped with a friction damper using SMA. The results showed that the hysteretic curves of the steel beam-column joint model equipped with the SMA-friction damper exhibited a significant "pinching" effect， leading to a notable reduction in residual deformation and demonstrating excellent recoverable functionality.
- NiTi shape memory alloy （SMA）,
- heat treatment,
- mechanical properties,
- constitutive model,
- finite element analysis

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References(21)

References

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