Numerical Analysis of Growing the Ductile Damage in Structures Reinforced by SMA Using Continuum Damage Mechanics Approach

Baghani, Mostafa; Ganjiani, Mehdi; Rezaei, Mohammad Hossein

doi:10.1142/s1758825118500709

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…This result is different from the expansion routine of traditional stainless steel stent and SMA stent, which is usually expanded by external force and reinforced by the plasticity of metal finally. As we know, SMA as a extensively investigated material (Ansari et al , 2018; Baghani et al , 2018; Lu et al , 2017), also possesses the shape memory ability and is widely applied to stent design. However, the expansion method for SMA stent is still dominated by an external mechanical operation such as balloon expanding.…”

Section: Resultsmentioning

confidence: 99%

Modelling and simulation of the expansion of a shape memory polymer stent

Liu

McGinty

Cui

et al. 2019

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Purpose The purpose of this paper is to demonstrate the feasibility of using shape memory polymer (SMP) for developing vascular stent. In particular, the expansion performance is analyzed through extensive modeling and simulation. Design/methodology/approach Firstly, the authors construct the model geometry and propose a constitutive model to describe the deformation of the stent due to the expansion process. The authors then simulate the expansion process under varying conditions, including different heating rates and recovery temperatures. Finally, the authors analyze the radial strength of the SMP stent. Findings A less invasive and stable expansion performance of the SMP stent is confirmed by the simulation method. A fitting function of the expansion process is proposed based on the characteristics of the SMP. Research limitations/implications The effects of dynamic blood flow on the SMP stent is ignored. A fluid-structure interaction analysis may need to be considered to give a more accurate description of the behaviour of the SMP stent. Practical implications The findings will provide guidance for the rational design and application of SMP stents. Social implications The work will provide guidance for the new generation stent design. Originality/value This is the first time that the expansion performance of a SMP stent has been analyzed both qualitatively and quantitatively through modelling and simulation.

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Section: Resultsmentioning

confidence: 99%

Modelling and simulation of the expansion of a shape memory polymer stent

Liu

McGinty

Cui

et al. 2019

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“…Predominantly, the shape memory applications can be separated into four classes as per the essential capacity of their memory component [106][107][108][109] where the SME can be utilized to create movement as well as load, and the SE can store the twisting vitality [110,111]. The extraordinary conduct of SMAs has produced new applications in the aviation, automobile, robotization, and control, machine, vitality, synthetic handling, warming and ventilation, security and safety, and hardware (MEMS gadgets) ventures.…”

Section: Brief Applicability Of Cu-based Smasmentioning

confidence: 99%

Cu-Based Shape Memory Alloys: Modified Structures and Their Related Properties

Saud¹

2020

Recent Advancements in the Metallurgical Engineering and Electrodeposition

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Cu-Al-Ni shape memory alloys (SMAs) have been developed for hightemperature applications due to their ability to return to pre-deformed shape after heating above the transformation temperature, as well as these alloys have a small hysteresis and high transformation temperature comparing with other shape memory alloys. Adding some of the alloying elements such as Ti, Mn, Be, Zr and B or changing the interior content either Al or Ni by increasing/decreasing may have a significant effect on the phase transitions and enhance the mechanical properties of these alloys. However, the martensite phase transformation is the most important factor, which can be changing the whole properties of Cu-Al-Ni SMAs, where this phase is mainly affected by the alloying elements additions. This chapter reviews the effect of alloying elements on the phase transitions and the enhancement of the mechanical properties of this alloy.

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“…Shape memory alloys (SMAs), as a new class of functional material [ 1 , 2 , 3 , 4 ] possessing many unique features (e.g., biocompatibility, pseudo-elasticity, and shape-memory effect), have been utilized in various fields over the last three decades, such as automotive engineering [ 5 , 6 ], the aerospace industry [ 7 ], robotics [ 8 , 9 ], medical implants [ 10 , 11 ], intelligent control engineering [ 12 , 13 ], structural reinforcement [ 14 ], and virtual reality technology [ 15 ]. In these applications, SMAs are often used as structural components and undergo repeated tensile-compressive cycles during service.…”

Section: Introductionmentioning

confidence: 99%

A Temperature-Dependent Model of Shape Memory Alloys Considering Tensile-Compressive Asymmetry and the Ratcheting Effect

Wang¹,

Feng²

2020

Materials

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Tensile-compressive asymmetry and the ratcheting effect are two significant characteristics of shape memory alloys (SMAs) during uniaxial cyclic tests, thus having received substantial attention in research. In this study, by redefining the internal variables in SMAs by considering the cyclic accumulation of residual martensite, we propose a constitutive model for SMAs to simultaneously reflect tensile-compressive asymmetry and the cyclic ratcheting effect under multiple cyclic tests. This constitutive model is temperature dependent and can be used to reasonably capture the typical features of SMAs during tensile-compressive cyclic tests, which include the pseudo-elasticity at higher temperatures as well as the shape-memory effect at lower temperatures. Moreover, the proposed model can predict the cyclic mechanical behavior of SMAs subjected to applied stresses with different peak and valley values under tension and compression. Agreement between the predictions obtained from the proposed model and the published experimental data is observed, which confirms that the proposed novel constitutive model of SMAs is feasible.

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Numerical Analysis of Growing the Ductile Damage in Structures Reinforced by SMA Using Continuum Damage Mechanics Approach

Cited by 6 publications

References 22 publications

Modelling and simulation of the expansion of a shape memory polymer stent

Modelling and simulation of the expansion of a shape memory polymer stent

Cu-Based Shape Memory Alloys: Modified Structures and Their Related Properties

A Temperature-Dependent Model of Shape Memory Alloys Considering Tensile-Compressive Asymmetry and the Ratcheting Effect

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