98 research outputs found
Appendix_Supplementary_material - On 3D-printed ZnO-reinforced PLA matrix composite: Tensile, thermal, morphological and shape memory characteristics
No full textAppendix_Supplementary_material for On 3D-printed ZnO-reinforced PLA matrix composite: Tensile, thermal, morphological and shape memory characteristics by Mohit Singh, Rupinder Singh, Ranvijay Kumar, Pawan Kumar and Pawan Preet in Journal of Thermoplastic Composite Materials</p
On the applicability of composite PA6-TiO2filaments for the rapid prototyping of innovative materials and structures
No full textIn the present paper a meticulous study for controlling the process parameters of twin screw extruder has been highlighted for in-house preparation of reinforced PA6-TiO2 hybrid feed stock filament (HFSF) of fused deposition modelling (FDM) for applications in several engineering fields. The experimental study has been reported for field engineers, to understand the influence of twin screw extrusion (TSE) process parameters on mechanical and metallurgical properties of Nylon-TiO2 HFSF for printing of functional prototypes by FDM, with special focus on the additive manufacturing of innovative composite materials and structures with arbitrary geometry at different scales. These properties were statistically compared to verify the suitability of the screw extrusion process. The study suggested the long-term performance level of the TSE process after it has been brought under statistical control. The provided data from the experimentation highlights the ability of the TSE process to produce a product that will consistently meet the design requirements and the customer expectation
On the recyclability of polyamide for sustainable composite structures in civil engineering
No full textPrevious studies have highlighted the potential application of Polyamide 6 (PA6) as excellent recyclable polymeric material, which is well suited to form carbon-fiber-reinforced, graphene-nanoplatelets-reinforced or metal-porous-polymer composite structures. The conventional screw extrusion process is one of the established melt processing techniques, having potential of enhancing mechanical, thermal and morphological properties of polymeric materials. PA6 is an important engineering material which exhibits excellent mechanical properties, chemical resistance, wear resistance, dimensional stability, and low coefficient of friction. In the present study attempts have been made to explore the behavior and characteristics of the recycled PA6 polymer through twin screw extrusion process towards increase in recyclability (as primary recycling process). The mechanical properties (tensile strength, Young's modulus, peak load), metallurgical properties (porosity, wear and material loss) supported with optical microscopy were investigated to ensure the recyclability of PA6 as a properties enhancing extrusion process. It has been observed in the present study that, melt processing by screw extrusion at best settings of input process parameters enhances the material properties for applications in sustainable civil engineering
Graphene as biomedical sensing element: State of art review and potential engineering applications
No full textNano graphene (Gr) particles are of abundant methodical and scientific interest as having the astonishing prospective to usage as the sensors element in the miniaturized and biomedical sensor device. The nano Gr particles have been appeared on the life science and health platform due to their interesting material performance like; excellent biocompatibility, conductivity, super para magnetism, thermal, chemical, mechanical and metallurgical properties to use as a sensor component. In recent years, Gr as nanoparticles has acquired powerful technological and scientific attention and having potential applications like; for fabrication of super-capacitors, batteries, solar or fuel cells, miniaturized and biomedical sensors. Gr is one of the most influential nano composites with endowment of use in the sensing mechanism like; bio-sensing, bio-imaging and diagnostic of diseases due to stimulating material behavior like; biocompatibility, cell growing properties, excellent surface behavior thermally and chemically etc. The present discussion explores the state of art review and prospective of the Gr in the miniaturized and biomedical sensors. The sensing mechanism for each of the sensors has been discussed for betters understanding of the functionality and prospective of the Gr in the sensors
Friction welding of dissimilar plastic/polymer materials with metal powder reinforcement for engineering applications
No full textFriction welding is one of the established processes for joining of similar as well as dissimilar polymer/plastics and metals. In past 20 years numbers of application in different areas using this process have been highlighted, but very limited contributions have been reported on properties of friction welded joints of dissimilar polymer/plastic materials after reinforcement with metal powder. In the present work an attempt has been made to perform friction welding of dissimilar plastic based materials by controlling the melt flow index (MFI) after reinforcement with metal powders. The present studies of friction welding for dissimilar plastic were performed on Lathe by considering three input parameters (namely: rotational speed, feed rate, and time taken to perform welding). Investigations were made to check the influence of process parameters on mechanical and metallurgical properties (like: tensile strength, Shore D hardness and porosity at joint). The process parameters were optimized using Minitab software based on Taguchi L9 orthogonal array and results are supported by photomicrographs
Weldability of thermoplastic materials for friction stir welding- A state of art review and future applications
No full textPolymer composites have certain advantages over metals in terms of mechanical as well as metallurgical properties. These can be joined with similar as well as dissimilar polymer composites (subject to certain conditions like glass transition temperature, rheological properties etc.). In last 20-25 years number of techniques and concepts has been developed to offer the possibility of joining of polymeric materials which have similar or dissimilar characteristics. In present scenario mechanical fastening and adhesive bonding is replaced by applying welding concepts like: laser transmission welding, friction stir welding (FSW), ultrasonic welding, hot fusion resistance welding etc. The FSW is one of the most acceptable welding techniques for production of structural/industrial components. In this present work, requirements of FSW and its process capability has been highlighted for joining of similar/dissimilar polymeric materials for future prospective
Friction welding for the manufacturing of PA6 and ABS structures reinforced with Fe particles
No full textIn the present work PA6 matrix reinforced with metal powder (Fe) has been joined by friction welding with ABS matrix reinforced with Fe powder for structural applications (like: joining of pavement sheets, assembly of pipe lines etc.). The melt flow index (MFI) of PA6+Fe powder was put approximately equivalent to MFI of ABS + Fe powder by varying the proportion of Fe powder in PA6 and ABS matrix. After fixing proportion of Fe powder in PA6 and ABS material, these materials were used for preparation of feed stock filament of fused deposition modelling filament (FDM) by screw extrusion process. Finally two FDM filaments of PA6+Fe powder and ABS + Fe powder were fed into FDM machine independently. The functional prototypes of circular cross-section were prepared on FDM machine (one with filament of PA6+ Fe powder and second with ABS + Fe powder). These geometrical shapes of two dissimilar plastic/polymer materials were used on friction welding setup. Finally under best parametric conditions of feed, rpm etc. these reinforced polymer materials were successfully joined. This study provides a response surface methodology (RSM) based statistical model for enhancing the weldability of dissimilar polymer materials (as an alternative method) with improved mechanical/metallurgical properties
Study on the effect of carbon-fiber-reinforced composites on tribological properties
No full textPolymer additive manufacturing (AM) has made significant progress in recent decades, but material properties, production speed, and part size constraints have limited it. As a result, it has mainly been used for rapid prototyping instead of the full-scale production of end-use components. Carbon fiber, however, offers several advantages, including low density, coefficient of thermal expansion, and high thermal conductivity. It can elevate polymer-based AM from simply achieving form and fit to achieving fit and function. Integrating carbon fiber into AM processes can lead to improved material characteristics, reduced production time compared to traditional subtractive methods, and decreased warping issues. This, in turn, allows for creating larger and more complex components. As a result, incorporating carbon fiber into various AM technologies has garnered increasing attention and interest within both academic and industrial circles. In the present chapter, a brief discussion on the effect of carbon fiber reinforcement on tribological properties of the additive manufactured CFRP composites is carried out.<br/
Cache optimization cloud scheduling (COCS) algorithm based on last level caches
Get PDFRecently, the utilization of cloud services like storage, various software, networking resources has extremely enhanced due to widespread demand of these cloud services all over the world. On the other hand, it requires huge amount of storage and resource management to accurately cope up with everincreasing demand. The high demand of these cloud services can lead to high amount of energy consumption in these cloud centers. Therefore, to eliminate these drawbacks and improve energy consumption and storage enhancement in real time for cloud computing devices, we have presented Cache Optimization Cloud Scheduling (COCS) Algorithm Based on Last Level Caches to ensure high cache memory Optimization and to enhance the processing speed of I/O subsystem in a cloud computing environment which rely upon Dynamic Voltage and Frequency Scaling (DVFS). The proposed COCS technique helps to reduce last level cache failures and the latencies of average memory in cloud computing multi-processor devices. This proposed COCS technique provides an efficient mathematical modelling to minimize energy consumption. We have tested our experiment on Cybershake scientific dataset and the experimental results are compared with different conventional techniques in terms of time taken to accomplish task, power consumed in the VMs and average power required to handle tasks
Analysis and Visualisation of Research Trends in Nano Material: A General Review
No full textTechnically, the material possessing a minimum, one external dimension measuring 1-100nm is called Nanomaterial, and cannot be seen by the naked eye. The bibliometric analysis had been conducted to understand the active authors, organizations, journals, and countries involved in the research domain of “Nanomaterial”[1], [2]. All published articles related to “Nanomaterial” from “Scopus”, were analyzed using the VOS viewer to develop analysis tables and visualization maps.This article had set the objective to consolidate the scientific literature regarding the “Nanomaterial”and also to find out the trends related to the same.The most active journals in this research domain were Construction and Building Materials and Composites Science and Technology. The most active countries were China and the United States of America. The leading organizations engaged in the research regarding Nanomaterial was the Chinese Academy of Sciences, the North Eastern University of China, and the Ministry of Education of China.The most active authors who had made valuable contributions related to Nanomaterial were Wang Y. and Yang H
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