Selvakumar
@vit.ac.in
Head of Department - VIT FASHION INSTITUTE OF TECHNOLOGY
VELLORE INSTITUTE OF TECHNOLOGY
EDUCATION
B.Tech, M.Tech., PhD
RESEARCH INTERESTS
Metal Matrix Composite
CNT based composite
Yarn Friction
Characterization
Clothing Comfort
Textile Technology
Wearable Technology
FUTURE PROJECTS
wearable electronics
Embedded electronics for health care monitoring
Applications Invited
Industry tie up
Scopus Publications
Scopus Publications
A. Arivarasi, D. Thiripurasundari, A. Arockia Selvakumar, Bhuvan Kumaar, T. Aghil, S. Rahul, and Ramani Kannan
AIP Publishing
Stroke represents a severe, widespread, and widely acknowledged health crisis on both national and international levels. It is one of the most prevalent life-threatening conditions. Despite impressive advances in treating stroke, in addition to a need for effective patient care services, many sufferers still rely solely on physical interventions. The present paper describes and explains the use of a newly designed gadget for stroke survivors who cannot move their fingers. This is a sophisticated mobile device that enables stroke patients to regain their muscle memory and thus their ability to perform repetitive actions by continuing to tighten and stretch their muscles without the intervention of a physiotherapist. Gamification methodology is used to encourage patients to become involved in the process of rehabilitation. The device also has sensors that take information and transmit it to an app through an ESP32 connection. This enables physicians to view glove usage information remotely and keep track of an individual patient’s health. Communication between app and glove is facilitated by a broker in the Amazon Web Service IoT. With the robotic glove presented here, the recovery rate is found to be 90.23% over four weeks’ duration, which represents a significant improvement compared with existing hospital-based rehabilitation techniques.
R. Muraliraja, R. Anthoni Sagaya Selvan, A. Selvakumar, M. Franco, T.R. Tamilarasan, U. Sanjith, Wei Sha, and Jothi Sudagar
Elsevier BV
Gowrishankar Govindaraj and Arockia Selvakumar Arockia Doss
International Association of Online Engineering (IAOE)
Gait cycle plays a major role in human locomotion. Patients with neuromuscular problems are unable to walk normally. Foot drop causes difficulty in lifting the front part of the foot and affects the dorsiflexion (DF) and plantar flexion (PF) motion of the foot. Patient with foot drop must use ankle braces to achieve a normal gait. The existing ankle-foot orthosis (AFO) has its own limitations, as it does not produce adequate PF motion. To overcome this scenario, a study was conducted to analyse the two-degrees-of-freedom (DOF) motion of a robotic ankle foot orthosis (RAFO) with a spring-based series elastic actuator (SEA) and scissor actuator. The objective of this paper is to evaluate the two DOF of RAFO with two different actuators using simscape multibody. The RAFO with actuators were designed using Solidworks, and simulation was carried out using simscape multibody, to analyse the 2-DOF motion. The dynamic motion analysis was carried out using block libraries, bodies, joints, constraints, revolute joints, sensors and a proportional integral (PI) controller. From the simulation results, the total range of motion (ROM) 40° (PF angle of –25° and DF angle of 15°) is achieved by the proposed RAFO with different actuators. Further, based on the results, the input power consumption of spring-based SEA was found to be less than the scissor actuator. Similarly, torque and output power generation of the scissor actuator was found to be greater than spring-based SEA to achieve the normal human ROM. Hence, the designer can choose a hybrid actuator for foot-drop-disorder applications.
T. R. Indumathi, R. Divya, B. Senthil Kumar, and A. Selvakumar
Springer Science and Business Media LLC
T. Senthilkumar, A. Selvakumar, and B. Senthilkumar
Springer Science and Business Media LLC
The emergence of carbon nanotubes (CNT) has encouraged widespread interest among researchers with many pioneering applications achieved by exploiting the unique properties of carbon allotropes. This article is a general overview of the diversity of applications of CNT and their various forms, particularly, in the area of surface coatings. The different methods, which have been developed and practiced in the preparation, dispersion, functionalization, and metallization of CNT, are elucidated. The composite coatings have been prepared using electrochemical methods such as electroplating and electroless plating. The review presents the mechanical, electrochemical, corrosion, thermal, electrical conduction, tribological, biosensing, magnetic, and microwave absorbing properties of CNT-based composites. The incorporation of CNT substantially affects the coating performance, and the level of influence can be befittingly adjusted to suit the application needs. Various characterization studies have been conducted on these coatings, emphasizing their properties. The potential of CNT as a versatile material in catering to diverse industrial applications has placed the carbon allotrope among the elite group of materials, drawing the attention of researchers to widen their scope of utilization. The challenges, problems, and ways of the overcoming are also addressed in this review.
Balakrishnaraja Rengaraju, M Jeevanantham, S Shanmugaraja, A Selvakumar, and S Tamilselvi
IOP Publishing
K. Krishnakumar and A. Arockia Selvakumar
Defence Scientific Information and Documentation Centre
This research paper describes a technique for the enhancement of the fatigue strength of the chain link plate in the drive system of a military armoured vehicle. SAE 1541 steel link plates of chains were subjected to cyclical tensile stress due to repeated loading and un-loading conditions. The crack was getting originated from the pitch hole and growth perpendicular to the chain pulling load, due to fatigue mechanism. In general plate holes are manufactured using the conventional process. An additional novel technique called the slip ball burnishing (SBB) method is applied for improving the hole properties. The improvement is made by producing local plastic deformation, improving surface finish and compressive residual stress throughout in the pierced hole. Both the conventional process (CP) and the SBB technique have been evaluated by optical, profile, surface roughness and micro harness tests. Experimental fatigue test validations were done in both chain samples using the Johnson-Goodman method. SBB chains passed 3x106 cycles at the load of 17.61 kN and CP chains passed 3x106 cycles at the load of 13.92 kN. The conclusion was that SBB made a significant improvement of 26.51 per cent of fatigue strength compared to CP.
S. Ramakrishnan, A. Selvakumar, K. R. Nandagopalan, and R. Hariharan
AIP Publishing
The advancement in fibre-reinforced polymer (FRP) innovation have a distinct fascination in executing another sort of strands named as basalt fibre reinforced polymer (BFRP), which has the dominating of being erosion safe, strong and cost effective that deliver a predominant outcome when applied in concrete structure. Besides, the accessible codal provision and aides does not give any suggestions to the use of Basalt bars since basic investigations and significant applications are as yet restricted. The objective of our investigation was progressed by two phases. The initial phase was led by examining the properties on BFRP and STEEL bars & these properties were evaluated and compared with the codal provision. The next phase of this test included testing of eight concrete beams (4 no’s of RC beam and 4 no’s of BFRP beam) of size 1700 mm long × 150 mm wide × 250 mm profound and to examine the flexural behaviour of both BFRP and RC beam under a two -point load over a clear span of 1550 mm until failure. The outcomes of these two phases were discussed in terms of its behaviour in crack, load, flexure and the mode of failure. Additionally, the test outcomes prove that the basalt bars have a great mechanical behaviour over concrete structures and it can be set as a substitution of STEEL bars for light, temporary structures.The advancement in fibre-reinforced polymer (FRP) innovation have a distinct fascination in executing another sort of strands named as basalt fibre reinforced polymer (BFRP), which has the dominating of being erosion safe, strong and cost effective that deliver a predominant outcome when applied in concrete structure. Besides, the accessible codal provision and aides does not give any suggestions to the use of Basalt bars since basic investigations and significant applications are as yet restricted. The objective of our investigation was progressed by two phases. The initial phase was led by examining the properties on BFRP and STEEL bars & these properties were evaluated and compared with the codal provision. The next phase of this test included testing of eight concrete beams (4 no’s of RC beam and 4 no’s of BFRP beam) of size 1700 mm long × 150 mm wide × 250 mm profound and to examine the flexural behaviour of both BFRP and RC beam under a two -point load over a clear span of 1550 mm until failure. The...
S. Ramakrishnan, A. Selvakumar, K. R. Nandagopalan, and R. Vivekanandan
AIP Publishing
The headway in fiber-fortified polymer (FRP) development have an unmistakable interest in executing another kind of strands named as basalt fiber strengthened polymer (BFRP), which has the overwhelming furthest reaches of being disintegration sheltered, solid and financially savvy that convey a prevalent result when connected in solid structure. Also, the available codal arrangement and associates does not give any proposals to the utilization of BFRP bars since fundamental examinations and noteworthy applications are up ’til now limited. The target of our examination was advanced by two stages. The underlying stage was driven by inspecting the properties on BFRP and STEEL bars& these properties were assessed and contrasted and the codal arrangement. The second period of this test included testing of eight solid bars (4no’s of RC bar and 4no’s of BFRP bar) of size 1700 mm long × 150 mm wide × 250 mm significant and to inspect the shear conduct of both BFRP and RC pillar under two - point stacking over a reasonable range of 1550 mm until disappointment. The results of these two stages were talked about as far as its conduct in split, load, shear and the method of disappointment. Moreover, the test results demonstrate that the basalt bars have an extraordinary mechanical conduct over solid structures and it very well may be set as a substitution of STEEL bars for light, transitory structuresThe headway in fiber-fortified polymer (FRP) development have an unmistakable interest in executing another kind of strands named as basalt fiber strengthened polymer (BFRP), which has the overwhelming furthest reaches of being disintegration sheltered, solid and financially savvy that convey a prevalent result when connected in solid structure. Also, the available codal arrangement and associates does not give any proposals to the utilization of BFRP bars since fundamental examinations and noteworthy applications are up ’til now limited. The target of our examination was advanced by two stages. The underlying stage was driven by inspecting the properties on BFRP and STEEL bars& these properties were assessed and contrasted and the codal arrangement. The second period of this test included testing of eight solid bars (4no’s of RC bar and 4no’s of BFRP bar) of size 1700 mm long × 150 mm wide × 250 mm significant and to inspect the shear conduct of both BFRP and RC pillar under two - point stacking over a r...
A Selvakumar, R Perumalraj, J Sudagar, and S Mohan
SAGE Publications
Nickel-based multiwalled carbon nanotube (Ni–MWCNT) composite coatings were electrodeposited over the inner groove of an aluminim alloy rotor with Zn–Ni interlayer. The surface of the composite coating was investigated by X-ray diffraction and scanning electron microscopy. The hardness of the coating was determined by Vicker's method. It was revealed that Ni–MWCNT composite coating has uniformity in thickness over the surface of the aluminim groove and also better particle distribution over the area. It was found that there was a significant improvement in the microhardness values of Ni–MWCNT composite coating than uncoated aluminum alloy rotor. In addition, the wear resistance of the composite coated increased nine times than the uncoated substrate. Thus, Ni–MWCNT composite coated aluminum alloy rotor can enhance the performance and life-time of the rotor in the textile industries.
A. Selvakumar, R. Perumalraj, P. N. R. Jeevananthan, S. Archana, and J. Sudagar
Informa UK Limited
NiP–multiwall carbon nanotube composite coatings were deposited on a textile component at ∼14 µm thickness through electroless plating route. The composites were prepared by depositing four different concentrations of multiwall carbon nanotube (i.e. 100, 200, 300 and 400 mg L–1) in an electroless bath over four NiP substrates. The NiP–multiwall carbon nanotube composite coating was observed to have a remarkably lower surface roughness and higher micro-hardness – by about 50% in both cases – in comparison with the NiP electroless plated substrate without the incorporation of multiwall carbon nanotube. In addition to that, there was a 14% reduction in yarn to metal friction between the investigated cases. This particular enhancement was adduced to the addition of surfactant to the electrolytic bath. The superior homogeneity in the distribution of multiwall carbon nanotube in the nickel matrix and the formation of the Ni–C bond were also identified to drive the multiwall carbon nanotube towards much improved properties.