Scientific Bulletin of Valahia University Materials and Mechanics最新文献_第6页

Structural Aspects Revealed by SEM Investigations for 2024 Aluminum Alloys 2024铝合金的SEM结构分析

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0014

F. Anghelina, D. Ungureanu, C. Popa, E. Stoian, I. Popescu, Cristiana Maria Enescu, Constantin C. Anghelina

引用次数: 0

Researches Regarding the Influence of Alloying Elements on the Mechanical Properties of Lamellar Graphite Cast Iron

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0012

E. Stoian, V. Bratu, Cristiana Maria Enescu, D. Ungureanu

{"title":"Researches Regarding the Influence of Alloying Elements on the Mechanical Properties of Lamellar Graphite Cast Iron","authors":"E. Stoian, V. Bratu, Cristiana Maria Enescu, D. Ungureanu","doi":"10.1515/bsmm-2018-0012","DOIUrl":"https://doi.org/10.1515/bsmm-2018-0012","url":null,"abstract":"Abstract Aim of the study is to present the technological process of obtaining cast iron with lamellar graphite for use in the manufacture of cylinder liners, and to identify the main alloying elements and track their influence on the mechanical properties of cast iron with lamellar graphite. Also paper presents analysis of 20 batches of cast iron with lamellar graphite, which are made of cylinder liners, in terms of chemical composition and the mechanical properties. After the analysis of the 20 castings of cast iron Fc 250 it is observed that: the increase in the carbon content shows a decrease of the tensile strength and hardness of the gray cast iron; the increase in silicon content shows a decrease in hardness and tensile strength. Decreasing the amount of graphite and especially the alloy of silicon iron lead to hardness increase 1% Si increases hardness by 50 HB). A statistical analysis has been performed on the data obtained that accounts for changes in alloying additions. A modeling and optimization of mechanical properties (tensile strength and hardness) was performed according to the percentages of carbon, silicon and manganese. Mathematical modeling found that the hardness and traction resistance of the cast iron decreased with the increase in carbon, silicon and manganese content.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"27 1","pages":"11 - 16"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91077338","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: 2

Numerical Modeling of the Dynamics of the Motor Wheel.Case of Rolling Without Sliding 电机车轮动力学的数值模拟。滚动无滑动情况

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0018

Vladimir Dragoş Tătaru, M. Tătaru

引用次数: 0

Intelligent 4D Mechatronic Microsystem Used in Metrological Measurement and Integrated Control Processes 智能四维机电微系统在计量测量和综合控制过程中的应用

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0017

Iulian Ilie, G. Gheorghe

引用次数: 0

Concretes with Organic Admixtures 含有机外加剂的混凝土

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0011

N. Angelescu, D. Ungureanu, V. Bratu

引用次数: 0

Incremental Numerical Method Used for the Kinematical Study of the Slider-Crank Mechanism 滑杆-曲柄机构运动学研究的增量数值方法

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0020

Vladimir Dragoş Tătaru, M. Tătaru

引用次数: 0

Tribometric Device for Determining Friction Forces and Friction Coefficients in the Case of Dry Friction of Materials 测定材料干摩擦情况下摩擦力和摩擦系数的摩擦测量装置

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0013

I. Petre, A. Catangiu, I. Popescu, D. Ungureanu, A. Negrea, A. Poinescu, M. Enescu, E. Stoian, V. Despa

引用次数: 8

3D Complex Structures Through Fused Deposition Modeling as a Rapid Prototyping Technology Designed for Replacing Anatomic Parts of Human Body 基于熔融沉积建模的三维复杂结构快速成型技术用于替代人体解剖部位

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0016

Nastase-Dan Ciobota, G. Gheorghe

引用次数: 0

Intelligent Platform with BLDC Drives and Microsystems for Mechatronic Applications in Security and Surveillance 基于无刷直流驱动和微系统的机电一体化平台在安防监控中的应用

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0015

D. Angelescu, G. Gheorghe

{"title":"Intelligent Platform with BLDC Drives and Microsystems for Mechatronic Applications in Security and Surveillance","authors":"D. Angelescu, G. Gheorghe","doi":"10.1515/bsmm-2018-0015","DOIUrl":"https://doi.org/10.1515/bsmm-2018-0015","url":null,"abstract":"Abstract Result of the Scientific Concerns from the Doctoral School of Mechanical Engineering and Mechatronics of the Valahia Târgovişte University and the research project of INCDMTM “INTEGRATED MECHATRONIC SYSTEM FOR HUMAN SECURITY INSURANCE FOR THE SAFETY OF OBJECTIVES AND INTERVENTIONS IN RISK - MISO ZONES” (project ID: PED-2016-0924, code PN-III-P2-2.1-PED-2016-0707) in the field of robotics, the scientific work “Intelligent Platform with BLDC Drives and Microsystems for Mechatronic Applications in Security and Surveillance “ is the completion of the experimental testing of controlling the movement of a security and surveillance robot, as part of the Ph.D. industrial thesis “Studies, research and contributions on the development of a smart mecatronic robot for security and surveillance applications”. The scientific work ultimately results in an intelligent, original platform that will be used to control the movement of the robot. The platform allows communication between the latest generation BLDC engine (embedded in the drive wheel) and it’s controller and a computerized microsystem that will handle the displacement controls and will also provide the link with the human operator through any remote guidance system that is used. Although designed for an intelligent security and surveillance mechatronic robot, this platform is proven to be extensively versatile for any other type of robot or mobile platform that uses BLDC wheel-drive engines. The project harmoniously combines Mechatronics, Cyber-MixMeatronic, Integronics and Artificial Intelligence into an Intelligent Interoperable Construction.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"106 1","pages":"25 - 29"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85466127","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

Researches on Inertial Mechatronic Motion Analysis Systems, Based on MEMS 基于MEMS的惯性机电运动分析系统研究

Scientific Bulletin of Valahia University Materials and Mechanics Pub Date : 2018-10-01 DOI: 10.1515/bsmm-2018-0019

C. Badea

{"title":"Researches on Inertial Mechatronic Motion Analysis Systems, Based on MEMS","authors":"C. Badea","doi":"10.1515/bsmm-2018-0019","DOIUrl":"https://doi.org/10.1515/bsmm-2018-0019","url":null,"abstract":"Abstract The aim of this paper is to provide an introduction into the inertial motion analysis field, focusing its attention on the analysis that is performed using modern mechatronic inertial motion capture systems, highlighting both the advantages and drawbacks of using such a system and outlining the main constituent elements of these systems as well as the necessary steps to be carried out in order to be able to accomplish such analysis. A modern mechatronic inertial motion analysis system’s evolution it’s based on MEMS (Micro-Electro-Mechanical-Systems) sensory network, each of which contains a combination of accelerometer, gyroscope, magnetometer. The signals from these MEMS are processed, by a microcontroller, using advanced algorithms in order to provide accurate data regarding body’s segments kinematics, global positioning and magnetic field. Those data are being transferred to a biomechanical model for the analysis. Despite its tremendous advantages, such as portability and real-time analysis capabilities, over alternative motion analysis systems, such as optical or mechanical systems, that based on external transmitters and/or video camera networks, restricting their use to special laboratory conditions and/or large workspace, mechatronic inertial systems are not based on an external infrastructure, they present a major disadvantage, namely the positional drift. The estimation of the human subject body’s segments positions and orientation, absolutely requires an initial calibration procedure, called „sensor to segment calibration”, that starts from the positional and orientation information received from the MEMS network, which are then transferred onto a biomechanical (scaled) model of the human body.","PeriodicalId":30754,"journal":{"name":"Scientific Bulletin of Valahia University Materials and Mechanics","volume":"20 1","pages":"44 - 50"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75448747","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