A comprehensive review on magnetic tissue scaffold for hyperthermia treatment
Dr Manjesh Kumar, Debashish Gogoi, Tanyu Donarld Kongnyui
Source Title: International Journal of Biomedical Engineering and Technology, Quartile: Q3, DOI Link
View abstract ⏷
This review explores the use of magnetic bone tissue scaffolds in hyperthermia treatment. It is a therapy that heats cancer cells to damage or destroy them while minimising harm to healthy tissues. Hyperthermia leverages the greater heat sensitivity of cancer cells, potentially enhancing treatment outcomes. Bone scaffolds, typically composed of biocompatible materials like ceramics or polymers, have emerged as promising tools for hyperthermia by incorporating magnetic nanoparticles that generate heat under an alternating magnetic field. This study aims to evaluate the current advancements in magnetic bone scaffolds for hyperthermia therapy, focusing on the materials, fabrication methods, and magnetic properties that influence their performance. The review also addresses key challenges in optimising scaffold design and offers recommendations for future research to improve therapeutic efficacy. Conclusions indicate that magnetic scaffolds have significant potential for targeted cancer treatment and bone regeneration, yet further studies are needed to enhance their clinical application. This review can guide future efforts toward optimising scaffold-based hyperthermia therapies.
A comprehensive review on 3D-printed bio-ceramic scaffolds: current trends and future direction
Dr Manjesh Kumar, Tanyu Donarld Kongnyui, Debashish Gogoi, Manjesh Kumar
Source Title: International Journal of Nano and Biomaterials, Quartile: Q4,
Recent Advances in Metal Additive Manufacturing: Processes, Materials, and Property Enhancements for Engineering Applications
Source Title: Journal of Materials: Design and Applications, Quartile: Q2, DOI Link
Parametric optimization of solvent-cast 3D-printed PCL composites for improved hardness
Source Title: Journal of Micromanufacturing, Quartile: Q2, DOI Link
View abstract ⏷
This study explores the fabrication of bone scaffolds using a composite ink of poly-?-caprolactone (PCL), polyhydroxybutyrate (PHB) and synthesized fluorapatite (FHAp) via response surface methodology optimization to achieve optimal Vickers hardness number (VHN). Characterization with X-ray diffraction confirms FHAp presence and increased crystallinity post-sintering, while Fourier-transform infrared spectroscopy reveals fundamental material interactions. Results show PCLs softening effect at higher concentrations, PHBs contribution to decreasing hardness and FHAps significant role in reinforcing the composite. Contour plots demonstrate peak hardness at lower PCL and PHB concentrations (<11% wt/v) with 18% wt/v FHAp. The optimum hardness values were found at PCL, PHB and FHAp of 9.754% wt/v, 9.473% wt/v and 24.608% wt/v, respectively, yielding 185.34 VHN. These findings offer insights into optimizing composite concentrations for tailored mechanical properties crucial in bone scaffold design, advancing regenerative medicine and tissue engineering
Material removal analysis during MR polishing of complex gear teeth profiles
Dr Manjesh Kumar, Nan Yu., Chandan Kumar., Hari Narayan Singh Yadav., Manas Das
Source Title: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Quartile: Q2, DOI Link
View abstract ⏷
The geometric intricacy of tiny gears makes nano-finishing difficult. In the current study, the magnetorheological (MR) polishing process is used for the nano-finishing of intricate surfaces of tiny gear components uniformly. For polishing, the technique employs a dynamic fluid recognized as magnetorheological polishing fluid (MRPF), that has the ability to stiffen in the presence of a magnetic field. Base media, iron and abrasive particles are utilized to synthesize the MRPF. Permanent magnets produce the necessary magnetic field in the finishing zone. Finite element analysis (FEA) is utilized to model the iron and abrasive particles to understand better how they would react in the external magnetic field. FEA is utilized to analyze the magnetic flux density (MFD) distributions and the amount of magnetic force exerting on gear profiles through iron particles (IPs). It has been observed that the IPs present close to the active abrasives are primarily accountable for indenting active abrasives into the workpiece surfaces. In addition, the influence of particle dimension on the stiffness of iron particle chains in MRPF has been investigated. A mathematical model for material removal is developed by utilizing normal finishing force analysis on active abrasives. Lastly, the finishing surface characteristics of gear profiles are examined using an optical profilometer, field emission scanning electron microscope (FESEM) and spectroscopic analysis. Finally, 92.68% improvement in the surface finish is observed.
Experimental and theoretical analyses of material removal in poppet valve magnetorheological finishing
Source Title: Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, Quartile: Q2, DOI Link
View abstract ⏷
Poppet valves used in internal combustion engines have a high risk of failure due to significant temperature and pressure. These poppet valves need surface finishing at the nano-scale level to prolong their life during their working use. In the present research, the chosen poppet valve has narrow ridge profiles, which is difficult to nano-finish by conventional processes due to certain limitations. The magnetorheological fluid-based finishing method can be effectively used for this kind of complicated narrow profile. For the magnetorheological fluid-based finishing processing of the poppet valve, a novel magnet fixture and setup is used. For checking the efficiency of this setup, surface characterization and surface roughness for polished and unpolished surfaces are outlined using a field-emission scanning electron microscope, microscope and optical profilometer. The final surface roughness of S = 23.1?nm at poppet profiles were obtained. All manufacturing defects like burrs, dents, scratches and pits are almost removed. The study of finishing forces in the magnetorheological fluid-based finishing method is also carried out using magnetostatic fluidsolid interaction, experimental and theoretical analysis. This force analysis supports the development of the material dislodgement model to anticipate material removal rate while finishing. The gap (error = 12.87%) between the experimental and theoretical material removal rate is marginal. It has high accuracy and reliability for specific applications.
A review on applications of molecular dynamics in additive manufacturing
Dr Manjesh Kumar, Debashish Gogoi, Amit Kumar., Sangjukta Devi., Anuj Sharma
Source Title: Journal of Micromanufacturing, Quartile: Q2, DOI Link
View abstract ⏷
Additive manufacturing (AM) is an emerging technology that has significant geometric and material capabilities, because of which it is being used in different fields such as aerospace, healthcare, automotive, architecture, and construction. This process takes the digital data for the three-dimensional model to be made and adds materials accordingly in a layer-by-layer manner. Therefore, the understanding of materials at the atomic level may help in getting optimized output in the AM process, and it can have a significant impact on the final products. Molecular dynamics (MD) studies the dynamic behavior of molecules and materials at the atomic and molecular scales. The main objective of this review article is to briefly discuss how MD simulations may be utilized to examine AM processes. This review also covers the potential benefits of using MD to characterize AM processes, the current literature on using MD to simulate AM processes, the primary obstacles and limitations of MD simulations, and the methodologies utilized in AM simulations using MD. Finally, this article concludes with an in-depth discussion and outlines future research potentials.
A comprehensive review on surface modifications of polymer-based 3D-printed structures: Metal coating prospects and challenges
Source Title: Polymers for Advanced Technologies, Quartile: Q2, DOI Link
View abstract ⏷
The production of complex structures out of a variety of materials has undergone a revolution due to the rapid development of additive manufacturing (AM) technology. Initially confined to applications such as magnetic actuators and two-dimensional electric or electronic circuits, the convergence of 3D printing and metallization methods has emerged as a revolutionary approach. This synergy facilitates the creation of functional and customizable metal-polymer hybrid structures characterized by high strength, lightweight properties, intricate geometric designs, and superior surface finish. These structures also exhibit enhanced electrical and thermal conductivity, as well as optical reflectivity. This paper reviews techniques to improve the effectiveness of 3D-printed polymer antennas and structures by using various techniques of metallization. The metallization processes are examined, and a classification based on the materials employed is presented to facilitate comparisons that highlight the optimal utilization of materials for the fabrication of 3D-printed polymer structures. The main emphasis here is on the effectiveness of different processes in terms of deposition, bonding strength, electrical conductivity, and various characteristics of metallic coatings developed on polymers. This review contributes an in-depth analysis of the latest developments in 3D printing and metallization techniques specifically applied to polymer antennas and structures. The exploration extends to potential applications, challenges encountered, and future prospects within this dynamic field. As AM and metallization continue to evolve, this study aims to provide a comprehensive understanding of the state-of-the-art methodologies and their implications for the future of polymer-based structures and antennas.
A review of different types of sustainable methods for composites
Dr Manjesh Kumar, Debashish Gogoi, Mayank Srivastava., Iti Dikshit., Jasvinder Singh
Source Title: Green Composites Manufacturing: A Sustainable Approach, DOI Link
View abstract ⏷
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Experimental investigation of PCL-based composite material fabricated using solvent-cast 3D printing process
Dr Manjesh Kumar, Debashish Gogoi, Tanyu Donarld Kongnyui, Jasvinder Singh
Source Title: Polymers for Advanced Technologies, Quartile: Q2, DOI Link
View abstract ⏷
Bone tissue engineering relies on scaffolds with enhanced mechanical properties, achievable through 3D printing techniques. Our study focuses on enhancing mechanical properties using a solvent-cast 3D printing method. For this, poly-?-caprolactone (PCL) reinforced with polyhydroxybutyrate (PHB), and synthetic fluorapatite (FHAp) nanopowders were utilized, immersed in a solution of dichloromethane (DCM) and dimethylformamide (DMF). Solgel method was used to synthesized FHAp, and the XRD pattern confirmed crystalline FHAp presence, with notable peaks at 2? values of 31.937°, 33.128°, 32.268°, and 25.864°. Moreover, composites exhibited nonchemical PCL-PHB/FHAp interactions, with PHB and FHAp crystallographic planes evident. Surface roughness, assessed via RMS values, showed progressive increases with higher PHB and FHAp content. Tensile strength peaked at 19% wt/v of PHB, with varied effects of FHAp. Compressive strength reached its apex at 30% wt/v of FHAp, with higher PHB content consistently enhancing strength. Flexural strength notably increased with PHB, peaking at 19% wt/v, and further with FHAp. Young's modulus rose with both PHB and FHAp content. Hardness increased with PHB and FHAp, notably peaking at 30% wt/v of FHAp. Cell viability improved with PHB, showing varied responses to FHAp. Hemocompatibility evaluations indicated low hemolysis percentages, especially in balanced PHB/FHAp compositions. These findings highlight the crucial role of composite compositions in tailoring mechanical and biological properties for optimal bone scaffold design, promising advancements in tissue regeneration technologies.
Applications and formulation of bio-ink in the development of tissue scaffold
Source Title: Bioimplants Manufacturing, DOI Link
View abstract ⏷
Three-dimensional (3D) bioprinting technology enables the fabrication of porous structures with complicated and variable geometries, allowing for the equitable distribution of cells and the regulated release of signalling components, which distinguishes it from traditional tissue scaffolding approaches. In 3D bioprinting, various cell-laden materials, including organic and synthetic polymers, have been used to create scaffolding systems and extracellular matrix (ECM) for tissue engineering (TE). However, significant technological hurdles remain, including bio-ink composition, printability, customizing mechanical and biological characteristics in hydrogel implants, and cell behaviour guiding in biomaterials. This chapter investigates several methodologies for hydrogel-based bio-inks that can mimic the ECM environment of real bone tissue. The study also looks at the process factors of bio-ink formulations and printing, as well as the structural requirements and production methods of long-lasting hydrogel scaffolds. Finally, contemporary bioprinting techniques are discussed, and the chapter concludes with an overview of the existing obstacles and probable future prospects for smart hydrogel-based bio-inks/scaffolds in tissue regeneration.
A comprehensive study of building materials and bricks for residential construction
Source Title: Construction and Building Materials, Quartile: Q1, DOI Link
View abstract ⏷
Residential construction materials have undergone a notable evolution within the construction sector. This paper extensively reviews various types of bricks and building materials commonly employed in house construction, categorizing them into classifications such as typical clay, concrete, fly ash, and new materials such as aerated concrete and recycled bricks. The study thoroughly investigates the mechanical, thermal, and environmental potentials of each material, also considering auxiliary building materials like mortar, cement, and bio-materials, which play vital roles in house construction. Its primary objective is to offer valuable insights to architects, engineers, builders, and researchers to facilitate informed decision-making in residential construction projects. It also considers factors such as sustainability and local availability. The research identifies Cellular Lightweight Concrete (CLC) bricks as the optimal choice for residential construction, given their compressive strength of up to 3040% more than traditional bricks, along with excellent lateral load capacity and displacement ductility, also making them suitable for constructing partition walls. Modifications in composition, such as incorporating coconut and basalt fibres, result in a notable enhancement of approximately 17.4% in thermal insulation with minimal impact on thermal degradation. Ultimately, this review serves as a valuable reference for individuals seeking a deeper understanding of the diverse options available in bricks and building materials for modern residential construction.
A Comprehensive Review on “Pyrolysis” for Energy Recovery
Dr Manjesh Kumar, Debashish Gogoi, Gruha lakshmi Yella
Source Title: Bioenergy Research, Quartile: Q1, DOI Link
View abstract ⏷
As a thermochemical conversion process, biomass pyrolysis has received a lot of interest for energy recovery by generating clean fuels, valuable compounds, and advanced materials. Innovative and novel pyrolysis procedures have arisen over time, and these processes may be optimized to produce high-quality end products. Substantial progress has been achieved in the development of analytical pyrolysis systems during the last few decades. However, due to a lack of knowledge of the reaction process, the current mechanism of biomass pyrolysis, as well as its economic feasibility, is far from a complete and thorough explanation. This review systematically covers biomass pyrolysis for energy recovery, the most recent advances in biomass pyrolysis, and the numerous factors responsible for the end products. Furthermore, the various feedstock compositions, as well as the techno-economic analyses, have also been reported. This review emphasizes discernment into future paths, intending to overcome existing deficiencies. This review may also be employed to get new insights into this field and be useful for future studies on biomass pyrolysis.
Gear Profile Polishing Using Rotational Magnetorheological Abrasive Flow Finishing Process
Dr Manjesh Kumar, Abhinav Kumar., Hari Narayan Singh Yadav., Manas Das
Source Title: Lecture Notes in Mechanical Engineering, Quartile: Q4, DOI Link
View abstract ⏷
Tiny gears play a critical role in the transfer of power in smaller machinery used in the aviation, automobile, and biomedical sectors, etc. Nano-finishing tiny gears is a tough job owing to their geometrys intricacy. Precise finishing of small gear increases its life and performance. To impart nano finishing on small gears, it is necessary to remove faults on gears working surfaces due to manufacturing. The faults include scratch marks, burrs, and pits. Very few finishing processes are applied to small gears due to the narrow spacing between the gear teeth. The rotational magnetorheological abrasive flow finishing process is a magnetorheological polishing fluid-based finishing process which delivers nanometer-level finishing. In the present study, this process is employed to nano finish small steel gear. This problem is addressed by developing gear workpiece fixture and synthesizes optimum polishing fluid in the finishing process. Wire electro discharge machining is used to manufacture the steel gear. After finishing the steel gear, minimum surface roughness of 34.5 nm is achieved. Maximum percentage improvement of surface roughness at involute profile of gear workpiece is obtained as 85.56%. Also, manufacturing defects are removed after the finishing process. After analyzing the finished surface, it is observed that recast layer on the ground surfaces is totally removed after the finishing procedure.
Fundamentals of Plasma polishing
Source Title: Advanced machining Science,
Numerical Analysis of Machining Forces and Shear Angle During Dry Hard Turning
Dr Manjesh Kumar, A. Alok, A. Kumar, M. Das and K.K Gajrani
Source Title: Advances in Sustainable Machining and Manufacturing Processes,
Effect of tool rotation on electrochemical milling of stainless steel
Source Title: Recent Advances in Mechanical Engineering,
A review of different types of sustainable methods for composites
Dr Manjesh Kumar, Debashish Gogoi, Jasvinder Singh
Source Title: Journal of Process Mechanical Engineering,
Multi-material 3D printing of metamaterials: Design, Properties, Applications and Advancement
Dr Manjesh Kumar, Debashish Gogoi, Tanyu Donarld, Jasvinder Singh
Source Title: Journal of Process Mechanical Engineering,
A Comprehensive Review on “Pyrolysis” for Energy Recovery
Dr Manjesh Kumar, Debashish Gogoi, Yella Gruha Lakshmi
Source Title: Journal of Process Mechanical Engineering,
Experimental and theoretical analysis of material removal in poppet valve magnetorheological finishing
Dr Manjesh Kumar, Chandan Kumar, Amit Kumar, Debashish Gogoi, Manas Das
Source Title: Journal of Process Mechanical Engineering, Quartile: Q2, DOI Link
Effect of micro tool tips in electrochemical micromachining
Dr Manjesh Kumar, A. Alok, M. S. Niranjan, A. Kumar, and M. Das
Surface Roughness Simulation During Rotational Magnetorheological Finishing of Poppet Valve Profiles
Source Title: Nanomanufacturing and Metrology, Quartile: Q1, DOI Link
View abstract ⏷
Surface finishing is essential for various applications in the aerospace industry. One of the applications is the poppet valve, which is used for leak-proof sealing of high-pressure gases in aerospace gas propulsion engines. The combustion engine also typically employs a poppet valve as an intake and exhaust valve. Nano-finishing a poppet valve is difficult because of its complex narrow profile. The precise nano-finished poppet valve perfectly fits on its seat and reduces hydrocarbon emissions. The rotationalmagnetorheological fluid-based finishing process can be used effectively for these complicated surfaces. The polishing agent in this process is magnetorheological fluid, and rheological properties are controlled by a permanent magnet. This article presents the uniform finishing of the poppet valve's narrow ridge profile, which is analyzed through finite element analysis (FEA), wherein the outcomes are uniform shear stress, normal stress, and magnetic flux density distributions along the poppet ridge profile. The study of forces exerting on abrasive grains and surface roughness simulation is also conducted using FEA findings. The experiment is subsequently performed to verify the simulation results for poppet profile polishing. The obtained experimental and simulated surface roughness values are comparable. After the finishing process, the maximum percentage improvement of surface roughness is obtained as 93.71%. The rotationalmagnetorheological fluid-based finishing process has high accuracy and reliability for specific applications.
Study of surface finishing mechanism in a rotational-magnetorheological miniature gear profile polishing using novel flow restrictor
Effect of optimum process parameters in rotational-magnetorheological poppet valve polishing
Recent advancements in advanced abrasive-based nano-finishing processes for biomedical components
Performance evaluation of rotational-magnetorheological glass-ceramic polishing (R-MRGP) process setups
Impact of different magnetorheological fluid compositions on poppet valve profile polishing
Plasma polishing method applied on optical materials: A review
Dr Manjesh Kumar, H. N. S. Yadav, M. Kumar, A. Kumar, M. Das
Magnetorheological-finishing of miniature gear teeth profiles using uniform flow restrictor
Experimental and simulation study of magnetorheological miniature gear-profile polishing (MRMGPP) method using flow restrictor
Improvement in surface characteristics of SS316L tiny gear profiles by magnetorheological-polishing fluid using flow restrictor
Advanced abrasive-based nano-finishing processes: challenges, principles and recent applications ive-based nano-finishing processes: challenges
Dr Manjesh Kumar, A. Alok, V. Kumar, M. Das - Mater
Fabrication of microtool for micromachining
Dr Manjesh Kumar, A. Kumar, A. Alok, H. N. S Yadav, and M. Das
COMSOL simulation of microwave plasma polishing on different surfaces
Dr Manjesh Kumar, H. N. S. Yadav, A. Kumar, M. Das
3D simulation of machining parameters of electrochemical micromachining for stainless steel
Dr Manjesh Kumar, A. Kumar, A. Singh, H. N. S. Yadav
A review on rheological properties of magnetorheological fluid for engineering components polishing
Dr Manjesh Kumar, A. Kumar, R.K Bharti, H.N.S Yadav and M. Das
Effect of tool rotation on the fabrication of micro-tool by electrochemical micromachining
Dr Manjesh Kumar, A. Kumar, M. Kumar, H. N. S. Yadav, M. Das
Abrasive based finishing method applied on biomedical implants
Dr Manjesh Kumar, A. Kumar, H. N. S Yadav, A. Alok , M. Das
CFD analysis of MR fluid applied for finishing of gear in MRAFF process
Dr Manjesh Kumar, M. Kumar, V. Kumar, A. Kumar, H. N. S. Yadav, M. Das
Synthesis and Characterization of Sintered Magnetic Abrasive Particles having Alumina and Carbonyl Iron Powder
Dr Manjesh Kumar, A. Alok, M. S. Niranjan, A. Kumar, and M. Das
Surface Texturing by Electrochemical Micromachining
Magnetorheological method applied to optics polishing
