{"title":"Design and development of 3D printed anti-microbial face mask by using fused deposition modeling","authors":"D. Devsingh, K. V. Rao, D. U. Chary","doi":"10.1063/5.0058151","DOIUrl":"https://doi.org/10.1063/5.0058151","url":null,"abstract":"Basically, there is a shortage of face masks during the global breakdown. Face masks are needed to people in all the countries. In public places the officials suggested the use of conventional masks. These are effective, but having few problems such as unable fit on the faces, eight hours lifecycle, Corona Virus Deise-19 viruses livening for 3 days on various surfaces on the masks. In order to overcome these problems 3-dimensional printed mask are very good suitable. In order to avoid these problems use Polylatic Acid (PLA) and anti-microbial Polylatic Acid (PLA) materials for face masks. The mask designed in CATIA software and 3D printed with anti-microbial PLA and PLA materials using Fused Deposition Modeling (FDM) process. Here the PLA and anti-microbial PLA masks are not directly tested and analyzed, but used tensile (ASTM D638) and flexural (ASTM D790) specimens. These specimens modeled and analyzed using CATIA software and printed by FDM machine. Maximum Von misses stress of 8.69e+007 N/m2 is observed in the tensile PLA specimen at the load of 2700N and 9.01e+007 N/m2 in the tensile anti-microbial PLA specimen at 2800N under the simulated condition using CATIA software. Maximum Von misses stress of 9.92e+006 N/m2 in the flexural PLA specimen and1.49e+007N/m2 in the flexural anti-microbial PLA specimen are seen on for the load of120N in the simulation. Using Instron UTM 60Tons, the maximum tensile strength obtained for PLA and anti-bacterial PLA specimens are 36.466MPa and 41.132MPa respectively. Whereas the experimental flexural strength noticed in PLA specimen is 62.67 MPa and anti-bacterial PLA specimens is 91.43 MPa.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77378795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
John Sebert Mampilli, C. S. S. Syam, K. P. A. Jith, A. Rajan, T. R. Rathish, Akash James
{"title":"Design of methane/oxygen fuelled bipropellant rocket engine","authors":"John Sebert Mampilli, C. S. S. Syam, K. P. A. Jith, A. Rajan, T. R. Rathish, Akash James","doi":"10.1063/5.0058359","DOIUrl":"https://doi.org/10.1063/5.0058359","url":null,"abstract":"A revived interest in space exploration and the requirements of an actively developing commercial market have led to renewed research into the development of new rocket engines that are simpler to build; use and can operate in a wider range of conditions. One such recent development is the interest in methane (CH4) as a rocket fuel. A sub-scale rocket engine using gaseous methane and gaseous oxygen as propellants was designed, with a chamber pressure of 10 bar and mixture ratio of 3:1. A shear co-axial gas-gas fuel injector for the same engine was also designed. Numerical simulation of the performance of the complete engine was carried out. The simulation results shows that the nozzle exit Mach number and pressure close to the analytically calculated values of Mach 2.5 and 0.5 bar, and the mass fraction of methane being depleted within the combustion chamber, indicating complete combustion of the fuel. The design of the fuel injector was an area of particular focus, partly due to the absence of well-documented and validated design data and methodologies, especially for the fuels chosen.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75751121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High-speed hybrid tree multiplier hardware using modified Wallace and Dadda method","authors":"Rashmi Samanth, S. Pooja, S. G. Nayak","doi":"10.1063/5.0057908","DOIUrl":"https://doi.org/10.1063/5.0057908","url":null,"abstract":"","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74395546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"FML tubular inversion for improved specific energy absorption","authors":"V. Gattineni, V. Nathi","doi":"10.1063/5.0057934","DOIUrl":"https://doi.org/10.1063/5.0057934","url":null,"abstract":"In the transportation sector, circular tubular sections were widely chosen as energy absorbers. Research has shown that the designs made of tubular inversions effectively avoid the bending modes and assist in energy absorption smoothly and gradually, as can be observed from the respective (compressive) force-deflection curves. But metallic tubular inversions usually have low specific energy absorption capacity, due to their weight. The present study explores the use of fiber metal laminate inversions made up of a combination of metal and fiber, with a focus to improve specific energy absorption. The initial metallic design configuration has been proposed based on the packaging volume available. The design has been further improved by the addition of splines as stiffeners. The material of the inversion configuration is then changed to avoid metallic damage. The design has been further improved by the adoption of fiber metal laminates to improve specific energy absorption and ease of manufacturing. The energy absorption calculations have done using finite element analysis methods. The energy absorption capacity of the stepped tube configuration with splines have been compared with that of the fiber metallic laminate configuration and the specific energy absorption capability compared.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86405017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The data intactness of efficient audit service outsourcing for data integrity in clouds","authors":"U. Veeresh, G. Kumar, S. Asif","doi":"10.1063/5.0057948","DOIUrl":"https://doi.org/10.1063/5.0057948","url":null,"abstract":"The cloud is the web-based computer which allows services to be exchanged. It enables users to use the application on any device with internet or intranet access without having an application installed and allows users to access their personal files and applications. Many people have recently used databases to store their data in the cloud. This is useful because it helps users to save data and allows users to access it anywhere and anywhere. The cloud has changed the way applications and databases are saved. Nowadays, running computing servers are stored in cloud computing. The main consideration of cloud information storage is the protection of cloud-specified information. The modern phenomenon used to store and handle data without investments in resources created many security problems that do not seem fully understood. This article focuses on cloud server information security and integrity. A third-party investigator is completed with the verification of data integrity who can sporadically check data integrity on behalf of his consumers.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87075193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Li, D. Li, J. Yang, P. Chen, C. Zuo, F. Song, D. Chen
{"title":"Investigation of the population density of excited atomic hydrogen in negative hydrogen ion sources based on a collisional-radiative model","authors":"Z. Li, D. Li, J. Yang, P. Chen, C. Zuo, F. Song, D. Chen","doi":"10.1063/5.0058485","DOIUrl":"https://doi.org/10.1063/5.0058485","url":null,"abstract":"Collisional-radiative (CR) models are useful to analyze the dynamic process of excited states and support the interpretation of excited population densities measured for example by optical emission spectroscopy (OES). A CR model of atomic hydrogen is described, in which the population densities of the excited states are coupled to the densities of ground state H, H2 and H2+. The three coupling channels, namely excitation of H, dissociative excitation of H2 and dissociative recombination of H2+, usually account for the main contributions to the excited hydrogen atoms in cesium free negative hydrogen ion sources. The population densities of excited hydrogen atom are presented for each channel. They have a similar dependence on electron density for the three channels. Furthermore, the influences of varying electron energy distribution function (EEDF) on the excited state density are discussed. Finally, the described CR model is applied to OES in an ICP hydrogen discharge and the estimated plasma parameters are given.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87533845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muthukumaran Ramasamy, Ajith Arul Daniel, D. U. Chary, M. Nithya
{"title":"Aluminium (Al7050) metal matrix composites: A review of reinforcement and mechanical characteristics","authors":"Muthukumaran Ramasamy, Ajith Arul Daniel, D. U. Chary, M. Nithya","doi":"10.1063/5.0058157","DOIUrl":"https://doi.org/10.1063/5.0058157","url":null,"abstract":"Al7050 is distinct among the Al – 7xxx alloy series due to its remarkable features. The rudimentary properties of Al7050 can be improved with the addition of appropriate reinforcing materials to further increase in its adaptability as various structural components. Extensive research is being carried out using different forms (metallic, non-metallic and organic compounds) of reinforcing materials to obtain suitable Aluminium metal matrix composites (AMMC) for specific applications. This review aims to provide an overview of two different reinforcement materials viz., Graphene and Silica utilized in Al7050 MMC and elaborates on the change in characteristics of the composite due to reinforcement inclusion.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86517522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vinod Kumar Bandu, Venkata Narayana Yenugula, B. Shirish
{"title":"Design and analysis of head expander of electrodynamic shaker for vibration testing","authors":"Vinod Kumar Bandu, Venkata Narayana Yenugula, B. Shirish","doi":"10.1063/5.0058032","DOIUrl":"https://doi.org/10.1063/5.0058032","url":null,"abstract":"Design of Head Expander (HE) for environmental vibration testing components with a required test frequency range has become very important, because it is an interface between electrodynamics vibration shaker and test specimen. The HE subjected to resonant and anti-resonant frequencies due to limitations of mass/stiffness properties. The random vibration and harmonic analysis of existing Head Expander was carried out and validated with tested results in the present work. The proposed new features Head Expander is designed by introducing three different hole-patterns which accommodates the different configurations of work pieces for vibration testing. Modal analysis, random vibration and harmonic analysis were carried out using generalized finite element software, ANSYS. The GRMS values of proposed HE design are compared with GRMS values of NAVMAT P-9492 work and found satisfactory.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81003257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of an efficient crank shaft for four wheeler passenger vehicle by using FEA","authors":"N. Prabhakar, S. S. Kumar, K. Rao","doi":"10.1063/5.0058363","DOIUrl":"https://doi.org/10.1063/5.0058363","url":null,"abstract":"Crankshaft plays a vital role to transform reciprocating motion into rotary motion. The design and analysis of the crankshaft is very important to improve the performance of I.C. Engine. In general the crankshaft is subjected to different pressure loads with respect to crank angle, therefore design and analysis of the crankshaft is important to increase the life of the four stroke engine. The main objective of this paper is to increase the life of the crankshaft of four stroke diesel engine by changing the main bearing diameter and crank web height in the existing design. The design was done by using CATIA software and analysis was done by using ANSYS. Two types of analysis, i.e. modal analysis and fatigue analysis have been carried out.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78393668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}