This paper presents the use of modified method of constant voltage technique, electrical resistivity and corrosion potential measurements in determining the effectiveness of corrosion inhibitors’ in concrete in arresting corrosion in the steel rebars in reinforced concrete specimens. Accelerated corrosion test is conducted on the different corrosion inhibitor mixed reinforced beams made with different cover thickness to understand the effect of cover thickness and type of inhibitor on the rate of corrosion based on the accelerated cracking initiated. Various inhibitors of corrosion, including calcium nitrite, sodium nitrite, hexamine and Diethanolamine, have been used in optimal dosage and investigated for their corrosion resistivity in concrete.
{"title":"Assessment of efficiency of corrosion inhibitors in mitigating corrosion of rebars in concrete","authors":"V. Reddy, T. Prashanth, V. Reddy, S. Shrihari","doi":"10.1063/5.0057893","DOIUrl":"https://doi.org/10.1063/5.0057893","url":null,"abstract":"This paper presents the use of modified method of constant voltage technique, electrical resistivity and corrosion potential measurements in determining the effectiveness of corrosion inhibitors’ in concrete in arresting corrosion in the steel rebars in reinforced concrete specimens. Accelerated corrosion test is conducted on the different corrosion inhibitor mixed reinforced beams made with different cover thickness to understand the effect of cover thickness and type of inhibitor on the rate of corrosion based on the accelerated cracking initiated. Various inhibitors of corrosion, including calcium nitrite, sodium nitrite, hexamine and Diethanolamine, have been used in optimal dosage and investigated for their corrosion resistivity in concrete.","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":"81403505","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}
BTR code (Beam Transmission with Re-ionization) is used for NBI beamlines design and studies since 2005. Initially tailored for beam re-ionized particles tracking in neutral beam ducts, BTR finally became a universal tool for 3D geometry optimization and thermal loads evaluation in injectors’ beamlines. BTR simulations include all variety of neutral beam formation and transport conditions - from the ion beam extraction grid of the ion beam source. From the very beginning BTR is created for public usage, and it comes with a truly interactive User-friendly interface (Windows GUI). The beam tracing model is straight-forward and deterministic, it is replicable and easily cross-checked with other beam tracking codes, including analytical models. BTR standard beam is a regular array of beamlets; their spatial positions, focusing and inner angular distributions are reproduced with high resolution: up to 105 test particles per beamlet. The particles are tracked in electromagnetic fields, with their transforming on gas and plasma targets, including neutralization, ionization in gas or plasma, etc. The accurate 6D (space+velocity) statistics allows a precise evaluation of beam direct losses; power deposition profiles are delivered with high resolution at the beamline components; the total amount of maps can reach several hundreds. BTR is parallel and able to trace up to 1010 macro-particles within few hours on average Windows machine, with the best performance achieved on 4-8-processor systems. Today BTR is a lively and evolving code, and free support is available to all the Users. Basic applications of BTR code are shown – with a focus on the conventional, Single-Run versions. The information on BTR upgrades and code manuals can be found online.
{"title":"BTR code for NBI design and optimization","authors":"E. Dlougach","doi":"10.1063/5.0057499","DOIUrl":"https://doi.org/10.1063/5.0057499","url":null,"abstract":"BTR code (Beam Transmission with Re-ionization) is used for NBI beamlines design and studies since 2005. Initially tailored for beam re-ionized particles tracking in neutral beam ducts, BTR finally became a universal tool for 3D geometry optimization and thermal loads evaluation in injectors’ beamlines. BTR simulations include all variety of neutral beam formation and transport conditions - from the ion beam extraction grid of the ion beam source. From the very beginning BTR is created for public usage, and it comes with a truly interactive User-friendly interface (Windows GUI). The beam tracing model is straight-forward and deterministic, it is replicable and easily cross-checked with other beam tracking codes, including analytical models. BTR standard beam is a regular array of beamlets; their spatial positions, focusing and inner angular distributions are reproduced with high resolution: up to 105 test particles per beamlet. The particles are tracked in electromagnetic fields, with their transforming on gas and plasma targets, including neutralization, ionization in gas or plasma, etc. The accurate 6D (space+velocity) statistics allows a precise evaluation of beam direct losses; power deposition profiles are delivered with high resolution at the beamline components; the total amount of maps can reach several hundreds. BTR is parallel and able to trace up to 1010 macro-particles within few hours on average Windows machine, with the best performance achieved on 4-8-processor systems. Today BTR is a lively and evolving code, and free support is available to all the Users. Basic applications of BTR code are shown – with a focus on the conventional, Single-Run versions. The information on BTR upgrades and code manuals can be found online.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"13 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":"76027052","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}
Morrish Kumar, S. Naik, Dulgach Rahul, S. N. S. S. Kumar
Central machine shop (CMS) is an integral part of engineering shops &foundry (ES&F) department where the entire repair works of the components is carried out and spare parts are produced. One such repair work is removal of damaged shafts and replacing with new ones. The project is concerned with designing integrated mechanism to remove the mountings on the twin table car (TTC) driver axle shaft. Twin table car is used to transport blooms from continuous casting department to bloom storage yard. If any damage caused to twin table car the entire production in the department gets hampered. The mountings on TTC drive axle shaft include gear box, coupling and bearing housing. It is very difficult to remove gear box from the complete assembly, so they cut the shaft into two portions, one portion contains only gear box from which it can be easily removed and the other portion of the shaft has coupling and bearing housing. From this remaining portion coupling and bearing housing are separated to replace a new shaft. The general practice carried out for their removal in central machine shop (CMS) is this assembly is carried to the hydraulic press with the help of a crane where the shaft is removed. It is a time-consuming process and involves more man power. The design of a portable mechanism is carried out i.e. hydraulic puller so that it can be carried to the place where there is drive axle assembly. This is a quicker process and involves less man power.
{"title":"Design modification in hydraulic puller for increased efficiency for dismounting TTC coupling","authors":"Morrish Kumar, S. Naik, Dulgach Rahul, S. N. S. S. Kumar","doi":"10.1063/5.0058136","DOIUrl":"https://doi.org/10.1063/5.0058136","url":null,"abstract":"Central machine shop (CMS) is an integral part of engineering shops &foundry (ES&F) department where the entire repair works of the components is carried out and spare parts are produced. One such repair work is removal of damaged shafts and replacing with new ones. The project is concerned with designing integrated mechanism to remove the mountings on the twin table car (TTC) driver axle shaft. Twin table car is used to transport blooms from continuous casting department to bloom storage yard. If any damage caused to twin table car the entire production in the department gets hampered. The mountings on TTC drive axle shaft include gear box, coupling and bearing housing. It is very difficult to remove gear box from the complete assembly, so they cut the shaft into two portions, one portion contains only gear box from which it can be easily removed and the other portion of the shaft has coupling and bearing housing. From this remaining portion coupling and bearing housing are separated to replace a new shaft. The general practice carried out for their removal in central machine shop (CMS) is this assembly is carried to the hydraulic press with the help of a crane where the shaft is removed. It is a time-consuming process and involves more man power. The design of a portable mechanism is carried out i.e. hydraulic puller so that it can be carried to the place where there is drive axle assembly. This is a quicker process and involves less man power.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76475764","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}
The research paper detail with the very important issue that how to provide Security to home which is under threat from the thief for burglary sometime person life will be in danger and now a day, the thief have become more advance in doing burglary not only home but bank shopping mall and gold & diamond jewellery and so to protect not only this building but also our houses, this research paper discuss about protection of building by using PIR sensor wich is a motion detector along with nodeMCU and mobile phone application which is called as Blynk we have to installed this application in our mobile phones this application will be active in phone and a screen will when a motion is detected by pir sensor
{"title":"IoT based surveillance system using with NODEMCU","authors":"P. P. Kumar, M. S. Khan, Prasad Janga, P. Kumar","doi":"10.1063/5.0058131","DOIUrl":"https://doi.org/10.1063/5.0058131","url":null,"abstract":"The research paper detail with the very important issue that how to provide Security to home which is under threat from the thief for burglary sometime person life will be in danger and now a day, the thief have become more advance in doing burglary not only home but bank shopping mall and gold & diamond jewellery and so to protect not only this building but also our houses, this research paper discuss about protection of building by using PIR sensor wich is a motion detector along with nodeMCU and mobile phone application which is called as Blynk we have to installed this application in our mobile phones this application will be active in phone and a screen will when a motion is detected by pir sensor","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87091011","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":"NIBS 2020 Timetable: Seventh International Symposium on Negative Ions, Beams and Sources","authors":"BelchenkoYuri, FairclothDan, LawrieScott, TarvainenOlli, WadaMotoi","doi":"10.1063/12.0005456","DOIUrl":"https://doi.org/10.1063/12.0005456","url":null,"abstract":"","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85726884","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}
Many of the manufacturing industries use sheet metal for optimizing the weight of the products. Forming process has been successively increasing during the past few decades. Indexing mechanisms have been used in milling, weaving, packing, etc. for continuous production purpose. Shearing of sheet metals has been widely used for optimizing the weight of the components and products. Crank slotter mechanism was widely used in the mechanisms for intermittent operations. This has been replaced by Geneva mechanism. The paper aims at deriving the mathematical relations for slotted Geneva wheel using curve theory. The kinematic characteristics are derived using the DH notations Finite element analysis has been done on the designed Geneva wheel with pin. It is analysed for the contact stresses when the drive crank pin slides along the slots of the wheel to operate the mechanism.
{"title":"Analysis on slot curvature and contact stresses on Geneva wheel","authors":"S. Bhaskar, K. P. Kumar, D. Kumar","doi":"10.1063/5.0058041","DOIUrl":"https://doi.org/10.1063/5.0058041","url":null,"abstract":"Many of the manufacturing industries use sheet metal for optimizing the weight of the products. Forming process has been successively increasing during the past few decades. Indexing mechanisms have been used in milling, weaving, packing, etc. for continuous production purpose. Shearing of sheet metals has been widely used for optimizing the weight of the components and products. Crank slotter mechanism was widely used in the mechanisms for intermittent operations. This has been replaced by Geneva mechanism. The paper aims at deriving the mathematical relations for slotted Geneva wheel using curve theory. The kinematic characteristics are derived using the DH notations Finite element analysis has been done on the designed Geneva wheel with pin. It is analysed for the contact stresses when the drive crank pin slides along the slots of the wheel to operate the mechanism.","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":"73571264","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}
A. Heiler, R. Friedl, U. Fantz, R. Nocentini, M. Sasao
The development of ion sources for NNBI systems at future fusion devices like ITER or DEMO is based on the surface production of negative hydrogen ions. Thus, low work function converter surfaces are mandatory. Besides the state-of-the-art technique of continuous Cs injection during ion source operation, alternative materials are desirable to overcome the drawbacks of volatile Cs coatings. In this work, a C12A7 electride material is studied regarding the work function behavior in a hydrogen and deuterium plasma environment at ion source relevant conditions. The minimum measured work function obtained during the campaign is 2.9 ± 0.1 eV, with an optimization potential to lower values at better vacuum conditions and higher annealing temperatures. Biasing the sample during plasma operation exhibits a strong impact on the work function performance, which is dependent on the polarity and the applied bias potential. The minimum work function obtained for the C12A7 electride used in this experiment is substantially higher than what is achieved with in situ caesiation (~ 2 eV), but the sample has demonstrated promising properties in terms of plasma resilience.
{"title":"Work function behavior of a biased C12A7 electride in low temperature hydrogen plasmas","authors":"A. Heiler, R. Friedl, U. Fantz, R. Nocentini, M. Sasao","doi":"10.1063/5.0057482","DOIUrl":"https://doi.org/10.1063/5.0057482","url":null,"abstract":"The development of ion sources for NNBI systems at future fusion devices like ITER or DEMO is based on the surface production of negative hydrogen ions. Thus, low work function converter surfaces are mandatory. Besides the state-of-the-art technique of continuous Cs injection during ion source operation, alternative materials are desirable to overcome the drawbacks of volatile Cs coatings. In this work, a C12A7 electride material is studied regarding the work function behavior in a hydrogen and deuterium plasma environment at ion source relevant conditions. The minimum measured work function obtained during the campaign is 2.9 ± 0.1 eV, with an optimization potential to lower values at better vacuum conditions and higher annealing temperatures. Biasing the sample during plasma operation exhibits a strong impact on the work function performance, which is dependent on the polarity and the applied bias potential. The minimum work function obtained for the C12A7 electride used in this experiment is substantially higher than what is achieved with in situ caesiation (~ 2 eV), but the sample has demonstrated promising properties in terms of plasma resilience.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83774181","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}
Ion time-of-flight spectra from nanosecond pulse laser ablation at 1064 nm wavelength of a graphite target under repeated 10 Hz pulse repetition are investigated. By injecting focused laser beams at 12° from the surface normal, the ablated target formed a vertical cavity as the target is rotated continuously. For increasing number of pulses, decrease in positive signals for positive ion extraction while increase in negative signals for both 5 and 20 GW/cm2 laser power densities at −3 kV extraction voltage were observed. Increase in voltage onto a positive ion retardation plate installed in front of the Faraday cup array showed distinct negative ion peaks with decrease in positive ion signal intensity. Time-of- flight signals under increased number of pulses with the positively biased retardation plate showed less pronounced negative ion peaks for 5 GW/cm2 at -3 kV extraction, whereas the peaks persisted for 20 GW/cm2 laser power density. The influence of target cavity development on the negative ion formation is discussed.
{"title":"Ion time-of-flight signals from nanosecond laser ablation plasmas excited in constricted cavities","authors":"J. E. Hernandez, M. Wada","doi":"10.1063/5.0057437","DOIUrl":"https://doi.org/10.1063/5.0057437","url":null,"abstract":"Ion time-of-flight spectra from nanosecond pulse laser ablation at 1064 nm wavelength of a graphite target under repeated 10 Hz pulse repetition are investigated. By injecting focused laser beams at 12° from the surface normal, the ablated target formed a vertical cavity as the target is rotated continuously. For increasing number of pulses, decrease in positive signals for positive ion extraction while increase in negative signals for both 5 and 20 GW/cm2 laser power densities at −3 kV extraction voltage were observed. Increase in voltage onto a positive ion retardation plate installed in front of the Faraday cup array showed distinct negative ion peaks with decrease in positive ion signal intensity. Time-of- flight signals under increased number of pulses with the positively biased retardation plate showed less pronounced negative ion peaks for 5 GW/cm2 at -3 kV extraction, whereas the peaks persisted for 20 GW/cm2 laser power density. The influence of target cavity development on the negative ion formation is discussed.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84299224","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}
In this article we have designed an efficient reconfigurable finite impulse response (RFIR) filter for the software defined radio applications. The proposed filter is designed with the sub modules as the adders and multipliers considering the hardware resource utilizations interms of throughput, latency, area, power consumption and delay. The useof parallel prefix adder (PPA) for partial products summation which are produced by multiplier. For faster multiplication, the distributed arithmetic (DA) look up table (LUT) based multiplier is used to multiply the x(n) and h(n) for performing the RFIR filter. The module is tested in both the platform MATLAB and Xilinx FPGA for random audio signal with and without noise. The Xilinx XPower analyzer shows 81mW onchip power required for the selected target Spartan 3E FPGA board.
在本文中，我们为软件无线电应用设计了一种高效的可重构有限脉冲响应(RFIR)滤波器。考虑到吞吐量、延迟、面积、功耗和延迟等硬件资源利用率，该滤波器采用子模块作为加法器和乘法器进行设计。并行前缀加法器(PPA)用于乘法器产生的部分乘积求和。为了更快地进行乘法，使用基于分布式算术(DA)查找表(LUT)的乘法器将x(n)和h(n)相乘，以执行RFIR滤波器。该模块在平台MATLAB和Xilinx FPGA上对随机音频信号进行了测试。Xilinx XPower分析仪显示所选目标Spartan 3E FPGA板所需的片上功率为81mW。
{"title":"Design and implementation of DA-RFIR filter for effective removal of noise from audio signal for SDR applications","authors":"G. Srikanth, Bhanu Murthy Bhaskara","doi":"10.1063/5.0058393","DOIUrl":"https://doi.org/10.1063/5.0058393","url":null,"abstract":"In this article we have designed an efficient reconfigurable finite impulse response (RFIR) filter for the software defined radio applications. The proposed filter is designed with the sub modules as the adders and multipliers considering the hardware resource utilizations interms of throughput, latency, area, power consumption and delay. The useof parallel prefix adder (PPA) for partial products summation which are produced by multiplier. For faster multiplication, the distributed arithmetic (DA) look up table (LUT) based multiplier is used to multiply the x(n) and h(n) for performing the RFIR filter. The module is tested in both the platform MATLAB and Xilinx FPGA for random audio signal with and without noise. The Xilinx XPower analyzer shows 81mW onchip power required for the selected target Spartan 3E FPGA board.","PeriodicalId":21797,"journal":{"name":"SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020)","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86308246","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}
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.
{"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}
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