Hysteretic Model for Superelastic NiTi Shape Memory Alloys

Lee, Chang Seok; Jeon, Jong‐Su

doi:10.7781/kjoss.2021.33.6.373

Cited by 1 publication

(1 citation statement)

References 24 publications

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“…Figure 5 shows the representative parameters required for modeling the properties of the superelastic shape memory alloy with UMAT. The critical material parameters include the initial elastic modulus (E A ), tangential elastic modulus (E T ), forward and reverse phase transition stresses (σ Fs , σ Ff , σ Rs , σ Rf ), and maximum strain (ε T ) [12]. The austenitic Poisson's ratio and martensitic Poisson's ratio were fixed at 0.33.…”

Section: Finite Element Analysismentioning

confidence: 99%

Investigating the Application of Smart Materials for Enhanced Maintenance of Rubber Expansion Joints in Bridge Expansion Joint Systems

Cho,

Lee,

Kim

et al. 2024

Applied Sciences

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In South Korea, the public infrastructure encompasses 172,111 facilities, with bridges accounting for a significant segment (totaling 34,199). These bridges undergo expansion due to traffic, vehicular loads, and temperature fluctuations. Expansion joint devices are installed to maintain vehicle stability and driving performance across expansion gaps. While these devices effectively ensure vehicular stability and performance, they do not address issues such as leakage and debris fall; therefore, rubber expansion joints should be installed. However, these rubber joints are prone to damage from various factors, resulting in secondary issues such as girder corrosion and accidents under bridges. Because of these inherent vulnerabilities, these joints require frequent replacements, making continuous bridge maintenance challenging. Therefore, this study explores the development of novel expansion joints using superelastic shape memory alloys to overcome the limitations of traditional rubber expansion joints. A comparative finite element analysis was conducted on the developed superelastic shape memory alloy and traditional rubber expansion joints. This study also assessed the long-term usability of these novel joints, particularly their ability to revert to their original shape post load removal. This research presents a promising alternative to conventional expansion joints and holds potential implications for enhancing the durability and safety of bridge infrastructure.

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Section: Finite Element Analysismentioning

confidence: 99%