Constitutive model derivation and numerical simulation of iron based Shape Memory Alloy pipe joint

2015 ◽  
pp. 845-848
Author(s):  
Wei Wang ◽  
Bo Wang ◽  
JiYuan Liu ◽  
Hong Hai
Keyword(s):  
Numerical Simulation ◽  
Shape Memory Alloy ◽  
Constitutive Model ◽  
Shape Memory ◽  
Model Derivation ◽  
Iron Based ◽  
Pipe Joint

Numerical Simulation of the Shape Memory Alloy Pipe Joint

2015 ◽  
Vol 4 (3) ◽  
pp. 96-100 ◽  
Author(s):  
Wei Wang ◽  
Bo Wang ◽  
Ji-Yuan Liu ◽  
Hong Hai
Keyword(s):  
Numerical Simulation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Pipe Joint

Predicting for Connecting Strength of Shape Memory Alloy Pipe-Connector

2011 ◽  
Vol 396-398 ◽  
pp. 912-915
Author(s):  
Ding Yuan Li ◽  
Fu Liu ◽  
Gang Li
Keyword(s):  
Theoretical Model ◽  
Stress State ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Iron Based ◽  
Increasing Temperature ◽  
Pipe Joint

A theoretical model is established in order to analyze the stress state and estimate the connecting strength of the iron-based shape memory alloy pipe-connector. The effect of the temperature on the connecting strength is investigated using this model. The results show that the enclasp force of pipe joint P and maximal stresses of pipe and pipe joint ( , ) decreases linearly as increasing temperature. P and ( , ) decrease as increasing the thickness of the pipe joint, the decrease of is less than that of . Therefore, the thickness of the pipe joint is small as much as possible in order to enhance the enclaspe force.

Tensile Test of Shape Memory Alloys and Numerical Simulation

2013 ◽  
Vol 710 ◽  
pp. 13-16
Author(s):  
Ping Guan ◽  
Yan Zhang ◽  
Di Cui
Keyword(s):  
Numerical Simulation ◽  
Comparative Analysis ◽  
Shape Memory Alloy ◽  
Constitutive Model ◽  
Tensile Test ◽  
Shape Memory ◽  
Constitutive Models ◽  
Pullout Test ◽  
Simulation Software ◽  
Analysis Of Results

Shape memory alloy (SMA) as an effective alternative to steel has received much attention. The constitutive model of SMA has raped developed for nearly 10 years, such as Boyd and Lagoudas model, Auricchio model, etc. However, a number of constitutive models were more complex, and not easily applied to engineering. In order to study SMA concrete pullout test using numerical simulation software, the tensile property of superelastic SMA was studied in this paper, different units (SOLID185 and LINK8) were simulated at the same time. Through the comparative analysis of results of different constitutive models, an easier used constitutive model of SMA was obtained. Combining with the numerical case, it shows that link8 is more convenient and accurate to simulates SMA.

scholarly journals Study on the Physical Properties of Split-type Iron Base Shape Memory Alloy Pipe Joint

2021 ◽  
Vol 2083 (2) ◽  
pp. 022072
Author(s):  
Yun Tian ◽  
Qi Yao ◽  
Dong Jiang ◽  
Yanni Xiao ◽  
Licheng Liu ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Pipeline System ◽  
Pull Out ◽  
Pressure Pipeline ◽  
Pipe Joints ◽  
Iron Based ◽  
Pulling Force ◽  
Pipe Joint

Abstract Aiming at the leakage phenomenon of pipeline system due to corrosion and other reasons, a split type iron-based shape memory alloy pipe joint based on the button bond connection was designed for repair. This split-type pipe joint can be used for quick in-situ maintenance of pipelines without cutting off pipelines or stopping transmission without pressure relief. It is especially suitable for intensive pipeline maintenance and online emergency maintenance. In order to study the connection performance of the split iron-based shape memory alloy pipe joint, this paper took the Fe17Mn4Si10Cr4Ni alloy pipe joint as the research object, and carried out pressure sealing and pull-out experiments respectively on the integral pipe joint and the split pipe joint which had not been carried out and had been subjected to one heat and mechanical training. The results showed that, compared with the integral pipe joint, the pressure seal value of the split pipe joint decreased by 40% to 20MPa and the pulling force decreased by 48.9% without heat-mechanical training. However, after 1 time of thermal-mechanical training, the pressure sealing value of the split-type pipe joint decreased by 12.5% to 32MPa and the pulling force decreased by 21.2% compared with the integral pipe joint. It can be seen that thermal-mechanical training can significantly improve the joint performance of split pipe joints, and the split pipe joint can meet the requirements of medium and low pressure pipeline connection and maintenance.

A constitutive model for Fe-based shape memory alloy considering martensitic transformation and plastic sliding coupling: Application to a finite element structural analysis

2012 ◽  
Vol 23 (10) ◽  
pp. 1143-1160 ◽  
Author(s):  
Walid Khalil ◽  
Alain Mikolajczak ◽  
Céline Bouby ◽  
Tarak Ben Zineb
Keyword(s):  
Finite Element ◽  
Phase Transformation ◽  
Structural Analysis ◽  
Shape Memory Alloy ◽  
Constitutive Model ◽  
Shape Memory ◽  
Internal Variables ◽  
Thermomechanical Loading ◽  
Proposed Model ◽  
Numerical Tool

In this article, we propose a finite element numerical tool adapted to a Fe-based shape memory alloy structural analysis, based on a developed constitutive model that describes the effect of phase transformation, plastic sliding, and their interactions on the thermomechanical behavior. This model was derived from an assumed expression of the Gibbs free energy taking into account nonlinear interaction quantities related to inter- and intragranular incompatibilities as well as mechanical and chemical quantities. Two scalar internal variables were considered to describe the phase transformation and plastic sliding effects. The hysteretic and specific behavior patterns of Fe-based shape memory alloy during reverse transformation were studied by assuming a dissipation expression. The proposed model effectively describes the complex thermomechanical loading paths. The numerical tool derived from the implicit resolution of the nonlinear partial derivative constitutive equations was implemented into the Abaqus® finite element code via the User MATerial (UMAT) subroutine. After tests to verify the model for homogeneous and heterogeneous thermomechanical loadings, an example of Fe-based shape memory alloy application was studied, which corresponds to a tightening system made up of fishplates for crane rails. The results we obtained were compared to experimental ones.

scholarly journals Iron-based shape memory alloy strips for strengthening RC members: Material behavior and characterization

2018 ◽  
Vol 173 ◽  
pp. 586-599 ◽  
Author(s):  
Moslem Shahverdi ◽  
Julien Michels ◽  
Christoph Czaderski ◽  
Masoud Motavalli
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Material Behavior ◽  
Iron Based

Elevated temperature behavior of an iron-based shape memory alloy used for prestressed strengthening of civil structures

2019 ◽  
Vol 211 ◽  
pp. 437-452 ◽  
Author(s):  
Elyas Ghafoori ◽  
Martin Neuenschwander ◽  
Moslem Shahverdi ◽  
Christoph Czaderski ◽  
Mario Fontana
Keyword(s):  
Elevated Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Temperature Behavior ◽  
Civil Structures ◽  
Iron Based
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