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5 results on '"Rani, AB"'

1. Shape memory alloy smart knee spacer to enhance knee functionality: Model design and finite element analysis

Author

Gautam, A, Rani, AB, Callejas, MA, Acharyya, SG, Acharyya, A, Biswas, D, Bhandari, V, Sharma, P, Naik, GR, Gautam, A, Rani, AB, Callejas, MA, Acharyya, SG, Acharyya, A, Biswas, D, Bhandari, V, Sharma, P, and Naik, GR

Abstract

© 2016 IEEE. In this paper we introduce Shape Memory Alloy (SMA) for designing the tibial part of Total Knee Arthroplasty (TKA) by exploiting the shape-memory and pseudo-elasticity property of the SMA (e.g. NiTi). This would eliminate the drawbacks of the state-of-the art PMMA based knee-spacer including fracture, sustainability, dislocation, tilting, translation and subluxation for tackling the Osteoarthritis especially for the aged people of 45-plus or the athletes. In this paper a Computer Aided Design (CAD) model using SolidWorks for the knee-spacer is presented based on the proposed SMA adopting the state-of-the art industry-standard geometry that is used in the PMMA based spacer design. Subsequently Ansys based Finite Element Analysis is carried out to measure and compare the performance between the proposed SMA based model with the state-of-the art PMMA ones. 81% more bending is noticed in the PMMA based spacer compared to the proposed SMA that would eventually cause fracture and tilting or translation of spacer. Permanent shape deformation of approximately 58.75% in PMMA based spacer is observed compared to recoverable 11% deformation in SMA when same load is applied on both separately.

Published
2016

2. Poly(vinyl chloride) Ionic Liquid Polymer Electrolyte Based on Bis(fluorosulfonyl)Amide for Sodium Secondary Batteries

Author

Azri, Mohd, Rani, Ab, Hwang, Jinkwang, Matsumoto, Kazuhiko, and Hagiwara, Rika

Abstract

Non-flammable electrolytes have been extensively studied to improve the safety of energy storage devices. In this study, a new ionic liquid polymer electrolyte (ILPE) prepared by a cast technique using poly(vinyl chloride) (PVC) as the host polymer was examined for sodium secondary batteries. The ILPE containing 50 wt% of 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)amide [C2C1im][FSA] ionic liquid showed an ionic conductivity of 5.6 mS cm[?]1 at 318 K. It remains stable up to 517 K based on 5 wt% loss. Stable sodium metal electrodeposition/dissolution was observed at the cathodic limit of the electrochemical window for the ILPE containing Na[FSA] ([C2C1im][FSA]:Na[FSA]:PVC = 2.0:1.0:1.0 w/w). The anodic limit was observed at around 4.7 V vs. Na+/Na on a Pt working electrode, while on an Al working electrode a higher anodic stability owing to passivation was observed. In the Na/[C2C1im][FSA]-Na[FSA]-PVC/-Na2FeP2O7-cell with the theoretical capacity of 97 mAh g[?]1, a reversible capacity of 92 mAh g[?]1 was obtained at 363 K for the Na2FeP2O7 positive electrode. These results suggest great potential of this PVC-based ILPE for constructing very safe sodium secondary batteries.

Published
2017

3. Ionic Liquid Polymer Electrolyte Based on Bis(fluorosulfonyl)Amide for Sodium Secondary Batteries

Author

Azri, Mohd, Rani, Ab, Matsumoto, Kazuhiko, and Hagiwara, Rika

Abstract

A new ionic liquid polymer electrolyte (ILPE) has been prepared for sodium secondary batteries. The ILPE is prepared by using a cast technique in which poly(vinyl chloride) used as a host polymer. The ILPE shows an ionic conductivity of 5.6 mS cm-1 at 318 K with 50 wt% of bis(fluorosulfonyl)amide ionic liquid. The stability of the ILPE reached 473 K based on 5 wt% loss. Sodium metal electrodeposition/dissolution was observed at the cathodic limit of the electrochemical window.

Published
2016

4. Comparison study on biosynthesis of silver nanoparticles using fresh and hot air oven dried IMPERATA CYLINDRICA leaf

Author

Najmi, Noor, Ahmad, Afiza, Md, Rabiatuladawiyah, Yahya, Sabrina M., Azri, Mohd, Rani, Ab, Ratim, Suzana, Rahman, Norafifah A., and Akil, Hazizan Md

Abstract

The perennial rhizomatous grass; Imperata cylindrica (I. cylindrica) has been reported rich in various phytochemicals. In present study, silver nanoparticles were synthesized from aqueous leaf extract of I. cylindrica at two different leaf conditions; fresh leaves and hot-air oven dried leaves. Biosynthesized silver nanoparticles were characterized by UV-visible spectroscopy, field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Maximum absorption was recorded between 400 nm to 500 nm. FESEM analysis revealed that the silver nanoparticles predominantly form spherical shapes. The particles sizes were ranging from 22-37 nm. The elemental composition of the synthesized silver nanoparticles was confirmed by using energy dispersive X-ray spectroscopy (EDX) analysis. Fourier transform infrared spectroscopy (FTIR) confirmed the reducing and stabilizing actions came from biomolecules associated with I. cylindrica leaf extract. Thus in this investigation, an environmentally safe method to synthesized silver nanoparticles using local plant extract was successfully established.

Published
2018

5. Shape memory alloy smart knee spacer to enhance knee functionality: model design and finite element analysis.

Author

Gautam A, Rani AB, Callejas MA, Acharyya SG, Acharyya A, Biswas D, Bhandari V, Sharma P, and Naik GR

Subjects
Finite Element Analysis, Humans, Computer-Aided Design, Knee Joint physiology, Knee Prosthesis, Nickel chemistry, Nickel therapeutic use, Prosthesis Design methods, Titanium chemistry, Titanium therapeutic use
Abstract

In this paper we introduce Shape Memory Alloy (SMA) for designing the tibial part of Total Knee Arthroplasty (TKA) by exploiting the shape-memory and pseudo-elasticity property of the SMA (e.g. NiTi). This would eliminate the drawbacks of the state-of-the art PMMA based knee-spacer including fracture, sustainability, dislocation, tilting, translation and subluxation for tackling the Osteoarthritis especially for the aged people of 45-plus or the athletes. In this paper a Computer Aided Design (CAD) model using SolidWorks for the knee-spacer is presented based on the proposed SMA adopting the state-of-the art industry-standard geometry that is used in the PMMA based spacer design. Subsequently Ansys based Finite Element Analysis is carried out to measure and compare the performance between the proposed SMA based model with the state-of-the art PMMA ones. 81% more bending is noticed in the PMMA based spacer compared to the proposed SMA that would eventually cause fracture and tilting or translation of spacer. Permanent shape deformation of approximately 58.75% in PMMA based spacer is observed compared to recoverable 11% deformation in SMA when same load is applied on both separately.

Published
2016
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