Phase transformation and energy dissipation of porous shape memory alloy structure under blast loading

Pant, Dinesh Chandra; Pal, Siladitya

doi:10.1016/j.mechmat.2019.02.010

Cited by 12 publications

(8 citation statements)

References 41 publications

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“…In the present study, the results indicated that the special deformed TPMS unit obtained a stronger energy dissipation capability than square pore, and even the grid scaffold had a higher porosity. Meanwhile, pore size at the stressed end and pore distribution also affected the energy dissipation [ 42 ], however, few studies have systemically explored the relationship among these parameters. For the deformed P structure, the larger pore size with a lower porosity was resulted in a higher energy dissipation.…”

Section: Discussionmentioning

confidence: 99%

The triply periodic minimal surface-based 3D printed engineering scaffold for meniscus function reconstruction

Wang

Jin

et al. 2022

Biomater Res

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Background The meniscus injury is a common disease in the area of sports medicine. The main treatment for this disease is the pain relief, rather than the meniscal function recovery. It may lead to a poor prognosis and accelerate the progression of osteoarthritis. In this study, we designed a meniscal scaffold to achieve the purposes of meniscal function recovery and cartilage protection. Methods The meniscal scaffold was designed using the triply periodic minimal surface (TPMS) method. The scaffold was simulated as a three-dimensional (3D) intact knee model using a finite element analysis software to obtain the results of different mechanical tests. The mechanical properties were gained through the universal machine. Finally, an in vivo model was established to evaluate the effects of the TPMS-based meniscal scaffold on the cartilage protection. The radiography and histological examinations were performed to assess the cartilage and bony structures. Different regions of the regenerated meniscus were tested using the universal machine to assess the biomechanical functions. Results The TPMS-based meniscal scaffold with a larger volume fraction and a longer functional periodicity demonstrated a better mechanical performance, and the load transmission and stress distribution were closer to the native biomechanical environment. The radiographic images and histological results of the TPMS group exhibited a better performance in terms of cartilage protection than the grid group. The regenerated meniscus in the TPMS group also had similar mechanical properties to the native meniscus. Conclusion The TPMS method can affect the mechanical properties by adjusting the volume fraction and functional periodicity. The TPMS-based meniscal scaffold showed appropriate features for meniscal regeneration and cartilage protection.

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Section: Discussionmentioning

confidence: 99%

The triply periodic minimal surface-based 3D printed engineering scaffold for meniscus function reconstruction

Wang

Jin

et al. 2022

Biomater Res

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“…The accuracy of the simplified approach is within 1% in comparison with the original Kingery results. Simplified Kingery Airblast Calculations approach recommended the following polynomial equation to determine the blast wave parameters, = [ + × (ln( )) + × (ln( )) 2 + × (ln( )) 3 + × (ln( )) 4 + × (ln( )) 5 + × (ln( )) 6 ]…”

Section: Modeling Of Blast Loadingmentioning

confidence: 99%

“…The only SMA application exposed to blast loading is porous NiTi SMA which is first designed by [5]. Pant et al performed a parametric study to investigate the phase transformation and energy dissipation capacity of porous SMA subjected to impact/blast loading [6].Due to the similarities between the earthquake and explosion loading environment, the possibility of using SMA as self-centering devices to mitigate the blast loading impulse is considered efficient. However, the nature of blast loading is somehow different, for instance, an extreme high strain rate along with high pressure impulse follows the explosion events [7], while seismic loading possesses a lower strain rate and it is cyclic in nature.…”

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confidence: 99%

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Behaviour of Smart Steel Column‐Beam Connection Under Blast Loading

Weli¹,

Gergely

2021

ce papers

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The generated damages in steel structures due to terrorist attack explosion has attracted structural engineering communities, because the effect of blast loading is extremely sever and destructive. The behavior of Superelastic Nickle Titanium Shape Memory Alloy (NiTi SMA) beam‐column connection was infrequently studied under the effect of blast loading. The present study develops smart steel beam‐column connection under the effect of blast loading. The performance of the proposed connection configuration is evaluated numerically to make better understanding of the conceptual design of NiTi SMA‐based smart bolted connections. NiTi SMA‐based smart connection stiffness and strength is determined based on Eurocode steel joint design procedures. Analytically, Simplified Kingery Airblast Calculations approach is used to generate time history blast reflected overpressure parameters. The austenite effect of NiTi‐SMA is introduced to the global 2D frame model by moment rotation capacity curves. The structural components are verified in Ultimate Limit State (ULS) by using the results of global 2D model. The outputs from the 2D global model is introduced in sub‐numerical models. The sub‐models examined by finite element software code. The result shows that the hysteresis flag‐shaped loop of NiTi‐SMA is well expressed by the sub‐models' numerical solutions. As a result, the proposed connection configuration can highlight the efficiency of NiTi‐SMA in terms of energy dissipation capacity under blast loading successfully.

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“…The porous NiTi shape-memory alloy is a highly dampened material for vibration damping, which has stronger damping properties than general metallic materials due to its large number of microporous structures and large number of grain boundaries in the tissue. It also has a greater prospect of application in vibration damping devices and is potentially valuable in reducing the effects of shocks and explosions [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Investigation of the Influence of Voids on the Impact Mechanical Behavior of NiTi Shape-Memory Alloy

Chen

et al. 2021

Materials

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To date, research on the physical and mechanical behavior of nickel-titanium shape-memory alloy (NiTi SMA) has focused on the macroscopic physical properties, equation of state, strength constitution, phase transition induced by temperature and stress under static load, etc. The behavior of a NiTi SMA under high-strain-rate impact and the influence of voids have not been reported. In this present work, the behavior evolution of (100) single-crystal NiTi SMA and the influencing characteristics of voids under a shock wave of 1.2 km/s are studied by large-scale molecular dynamics calculation. The results show that only a small amount of B2 austenite is transformed into B19’ martensite when the NiTi sample does not pass through the void during impact compression, whereas when the shock wave passes through the hole, a large amount of martensite phase transformation and plastic deformation is induced around the hole; the existence of phase transformation and phase-transformation-induced plastic deformation greatly consumes the energy of the shock wave, thus making the width of the wave front in the subsequent propagation process wider and the peak of the foremost wave peak reduced. In addition, the existence of holes disrupts the orderly propagation of shock waves, changes the shock wave front from a plane to a concave surface, and reduces the propagation speed of shock waves. The calculation results show that the presence of pores in a porous NiTi SMA leads to significant martensitic phase transformation and plastic deformation induced by phase transformation, which has a significant buffering effect on shock waves. The results of this study provide great guidance for expanding the application of NiTi SMA in the field of shock.

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Phase transformation and energy dissipation of porous shape memory alloy structure under blast loading

Cited by 12 publications

References 41 publications

The triply periodic minimal surface-based 3D printed engineering scaffold for meniscus function reconstruction

The triply periodic minimal surface-based 3D printed engineering scaffold for meniscus function reconstruction

Behaviour of Smart Steel Column‐Beam Connection Under Blast Loading

Molecular Dynamics Investigation of the Influence of Voids on the Impact Mechanical Behavior of NiTi Shape-Memory Alloy

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