Scientific Bulletin of Valahia University Materials and Mechanics最新文献_第8页

Using 3D Scanning Techniques in Orthopedic Systems Modeling 在骨科系统建模中使用3D扫描技术

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0016

Mihai-Constantin Balașa, S. Cuculici, C. Pantu, S. Mihai, A. Negrea, Mihai-Octavian Zdrafcu, D. Let, V. Filip, Ș. Cristea

{"title":"Using 3D Scanning Techniques in Orthopedic Systems Modeling","authors":"Mihai-Constantin Balașa, S. Cuculici, C. Pantu, S. Mihai, A. Negrea, Mihai-Octavian Zdrafcu, D. Let, V. Filip, Ș. Cristea","doi":"10.1515/bsmm-2017-0016","DOIUrl":"https://doi.org/10.1515/bsmm-2017-0016","url":null,"abstract":"Abstract Designing orthopedic implants with a long lifespan is essential for improving patients’ quality of life. It is necessary to develop new products with a high degree of personalization for the human body. Physicians and engineers analyzed the geometry and behavior of healthy joints’ motion under specific load conditions as well as the behavior over time and lifetime of orthopedic implants fitted to patients to improve their quality. The paper presents the way in which three-dimensional modeling techniques using specialized software (Catia, SolidWorks) can be combined with reverse engineering techniques (3D scanning) to optimize the design of orthopedic implants. The design of an implant consists of its three-dimensional modeling, as well as simulation of its integration into the human body, in order to analyze its behavior during motion. Therefore, it is necessary not only to 3D model the parts that make up the implant itself, but also to 3D model the bone to which the implant will be fitted. The paper highlights the complementarity of the classic modeling techniques with the reverse engineering techniques, which is necessary because the design of the parts that make up the implant itself can be achieved by specialized software modeling techniques, while the bones, having complex geometries, are better suited to 3D Modeling by scanning.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"17 1","pages":"41 - 47"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80220710","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}

引用次数: 7

Methods of Determining Sock Values and the Distance Between Axes of the Gearboxteething Using a Fitted Tooth Engagement 用配合齿啮合确定齿轮箱出齿的齿距和齿距的方法

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0017

D. Stanciu, G. Gheorghe

引用次数: 0

Porous Metallic Biomaterials Processing (Review) Part 1: Compaction, Sintering Behavior, Properties and Medical Applications 多孔金属生物材料加工(综述)第1部分:压实、烧结行为、性能和医疗应用

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0015

I. Popescu, R. Vidu, V. Bratu

引用次数: 11

A Comparative Study on the Properties of Potentially Bioactive Glasses Obtained by Sol-Gel Technique and by Melting Mixtures of Oxides 溶胶-凝胶法与氧化物熔融法制备的潜在生物活性玻璃的性能比较研究

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0013

D. Avram, D. Ungureanu, N. Angelescu, J. L. Barroso de Aguiar

{"title":"A Comparative Study on the Properties of Potentially Bioactive Glasses Obtained by Sol-Gel Technique and by Melting Mixtures of Oxides","authors":"D. Avram, D. Ungureanu, N. Angelescu, J. L. Barroso de Aguiar","doi":"10.1515/bsmm-2017-0013","DOIUrl":"https://doi.org/10.1515/bsmm-2017-0013","url":null,"abstract":"Abstract Phosphocalcic glasses, based on ternary system SiO2 - CaO- P2O5 and those doped with copper (SiO2 – CaO - P2O5 - Cu2O) can be obtained by the traditional method of sub-cooling melts or modern methods such as process that uses mechanical energy, neutrons action, deposition in thin layers or by sol-gel technique. This paper shows the experimental results of three compositional phosphocalcic glasses: 50% SiO2 - 43% CaO - 7% P2O5, 50% SiO2 - 38% CaO - 7% P2O5 - 5% Cu2O obtained through sol-gel method and 45% SiO2 - 22.5% CaO - 22.5 Na2O - 5% P2O5 - 5% Cu2O obtained by melting. In order to study their bioactivity, the three compositions were structural analyzed by X-ray diffraction method. In this case the apatite formation was highlighted after soaked in simulated body fluid, but also other compounds (CaCO3 and CuO) resulting from the same process were observed. In case of the melting glass apatite formation has not been highlighted. The functional groups present in the structure of glasses before and after soaking (PO43−, CO32− and HO−) were highlighted by the Fourier Transform Infrared Spectroscopy (FTIR). The elemental chemical composition was confirmed by elemental analysis WD-XRF. The morphology of sol-gel glass powders was revealed by SEM analysis. All glass compositions were tested in terms of antibacterial activity in vitro.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"40 1","pages":"18 - 24"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85831687","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}

引用次数: 4

New Measurements Results Achieve for Proactive Maintenace with Vibro-Expert Diagnosis System 新的测量结果实现与振动专家诊断系统的主动维护

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0018

Ionel Rusa, Cornel Marin, Marius Baidoc

引用次数: 1

Study of 7075 Aluminium Alloy Joints 7075铝合金接头的研究

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0011

I. Peter, M. Rosso

引用次数: 6

Intelligent 3D Video-Laser System for Measuring Distance and Avoidance of Obstruct Obstacles Integrable Into Robotic Platforms 集成在机器人平台上的智能三维视频激光距离测量和障碍物规避系统

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0020

D. Angelescu, G. Gheorghe

{"title":"Intelligent 3D Video-Laser System for Measuring Distance and Avoidance of Obstruct Obstacles Integrable Into Robotic Platforms","authors":"D. Angelescu, G. Gheorghe","doi":"10.1515/bsmm-2017-0020","DOIUrl":"https://doi.org/10.1515/bsmm-2017-0020","url":null,"abstract":"Abstract Outcome of the scientific concerns from the Doctoral School of Mechanical Engineering and Mechatronics at Valahia University of Târgovişte in the field of unconventional measurements using non-contact laser technique, the scientific work “Intelligent 3D video-laser system for measuring distance and avoidance of obstruct obstacles integrable into robotic platforms” is a work in progress being in the experimental phase of single-channel testing. The system is designed for robotic platforms for special interventions in high-risk work environments, with the main goal of an active, real-time 3D spatial stereo interface for the operator who manages the robotic platform remotely. 3D imaging and real-time measurements of distances provide the operator of the robotic intervention platform with the ability to perform extremely precise maneuvers. The scientific work ultimately results in an intelligent integral system that can predict the emergence of an obstacle to the robotic platform movement, thus determining the distance in real time to it. The measuring distance is between 0 m - 40 m, with an accuracy of +/−0.5 cm being synchronized with the video system with a clear visual area from 0.05 m to infinity. The 3D video laser system can simultaneously shoot movie or single images of the obstacle, storing data in 3D, photo or video digital formats, both locally in non-volatile memory or externally thru any GPSR network to the operator and / or to a control center. In later development, the measurement system will be coupled to a GPS network for auto location of position and architected with a self-defense and offensive module mounted on the mobile robotic platform. Thus, this complex project combines in a unified knowledge of Mechatronics, Integronics, Cyber-Mix Mechatronics, Artificial Intelligence and Information Technology.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"27 1","pages":"78 - 82"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88056239","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}

引用次数: 0

Study on Influence of Microstructure and Thermal Treatment on Magnetic Losses from Non-Oriented Silicon Electrical Steel 无取向硅电工钢显微组织及热处理对磁损耗影响的研究

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0012

E. Stoian, M. Enescu, V. Bratu, C. Rusănescu, F. Anghelina

{"title":"Study on Influence of Microstructure and Thermal Treatment on Magnetic Losses from Non-Oriented Silicon Electrical Steel","authors":"E. Stoian, M. Enescu, V. Bratu, C. Rusănescu, F. Anghelina","doi":"10.1515/bsmm-2017-0012","DOIUrl":"https://doi.org/10.1515/bsmm-2017-0012","url":null,"abstract":"Abstract Non/oriented electrical sheets are sheets tailored to produce specific properties and are produced from Fe-Si or Fe-Si-Al alloys. Non-oriented electrical steel sheets are incorporated into a wide range of equipment, from the simplest domestic appliances to hybrid and pure electric vehicles. In studying about the magnetic, there have a lot of method can be used for the different experiment requirement such as measuring magnetic flux, nominal loss and other objectives. During electrical steel processing, there are usually small variations in both chemical composition and thickness in the hot-rolled material that may lead to different magnetic properties for the same steel grade. Therefore, it is of great importance to know the effects of such variations on the final microstructure and magnetic properties of these steels. The purpose of this work was to study microstructural changes of the bands investigated during processing occurring siliceous strips with non-oriented grains. The second aim was to study the influence of grain size on the total magnetic losses at 1.0 T and 1.5 T. Materials 10 rolls intended to be processed into quality electrical steel M400-50A (according to EN 100027-1) were analyzed with metallographic microscope Neophet 32 and the magnetic characteristics was made with Epstein frame according IEC 6040/4-2, with an exiting current frequency of 50Hz at 1.5T and 1.0T induction after aging treatment of 225°C for 24 hours. Sample for light microscopy observation were prepared by polishing and etching in 5% Nital.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"161 1","pages":"12 - 17"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86791887","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}

引用次数: 1

New Concepts on Making of Mechatronic and Cyber-Mix-Mechatronic Systems 机电一体化和网络-混合机电一体化系统制造的新概念

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-10-01 DOI: 10.1515/bsmm-2017-0019

G. Gheorghe, V. Bratu, Adriana Cîrstoiu, V. Despa

引用次数: 0

Study on Hydration and Strengthening of High Alumina Cements 高铝水泥水化强度研究

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2017-04-25 DOI: 10.1515/bsmm-2017-0004

N. Angelescu, C. Stancu, S. Amziane, V. Bratu, E. Stoian

引用次数: 2