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Online since: September 2019
Authors: Vlada Semenova, Pan Yuan, Ekaterina Andriushchenko
Using 3D printer, we are able to model samples with varied structures and mechanical properties by setting of a printer [4-6].
These parameters affect the surface finish and, therefore, not only mechanical properties, but also tribological behavior of the parts.
Goals and Methods Strength of specimen made using 3D printing is justified by three factors: material we use for printing, filling and orientation of layers [7-9].
Masaylo, Orlov, Microstructure And Mechanical Properties of Additive Manufactured Copper Alloy, Materials Letters, Elsevier Science Publishing Company Inc., 2016, pp. 38-41
Sidorova, Mechanical Properties And Structure of Deposited Wear-Resistant Metal, Metal Science And Heat Treatment, 1994, pp. 421-425
Online since: May 2012
Authors: Mao Yan He, Jian Guo Luo
Method of analytic geometry used to find the regular cuboid of the reachable working space shape of mechanism, the volume of the reachable working space rest with the limit of translation of couplers, its influential factors obtained, limit length of guideway etc. are the primary influential factors.
The working space is the important properties of mechanism, main factors affect its volume and shape include the restriction of pole length, restriction of rotational angle of rotation coupler and the interference of link size[12], main factors affect the working space of PPP-S(P)[T]-PPP hybrid cubic manipulator include the length of guideway, the variable length of elongable pole, range of rotation of spherical joint and range of rotation angle of rotation coupler on output shaft.
(3) The rotational angle limits of output shaft at given configuration can be found through the method of drawing, Limit length of the vertical elongable poles is the primary influential factors.
Huang: submitted to Journal of Mechanical Engineering(2007) [6] L.W.Tsai: submitted to Journal of Mechanical Design( 2002) [7] K.
Kim: submitted to Journal of Mechanical Design(1999) [11] L.
Online since: August 2018
Authors: Tadashi Nishihara, Tetta Tajima, Hamed Mofidi Tabatabaei
Experiments revealed that FSF can be used to mechanically interlock steel balls and iron oxide with aluminum alloy and develop an aluminum metal matrix composite with improved magnetic properties.
Results are discussed in terms of microstructural observation, hardness and magnetic properties.
Many of modern technologies require composite’s properties that cannot be met by the conventional metal alloys, ceramics or polymeric materials. [1, 2] When in a composite the matrix is metal, it is termed as “metal matrix composite (MMCs)” [2].
Fe, Ni, Co are some examples of chemical elements capable of producing alloys with magnetic properties at ambient temperature.
Stirring time after the tool penetration (dwell time) is another important factor which affects the heat-input.
Online since: July 2011
Authors: Lin Hua Jiang, Yi Xu
Four control factors and two responses were used.
Here it is intended to investigate the potential influence that a range of ingredient parameters have on the mechanical properties and thermal performance of EPS lightweight concrete.
The factors and levels to be considered of the concretes are given in Table 1.
Table 1 Factors and factor levels Levels Factors Cement (kg/m3) W / C Volume of EPS (per unit volume of concrete) % Sand ratio % 1 400 0.45 15 35 2 450 0.50 20 38 3 500 0.55 25 41 Experimental procedure.
Fig. 2 Effect of factors on density Fig. 3 Effect of factors on compressive strength Compressive strength vs. density.
Online since: September 2013
Authors: Eun Sang Lee, Hon Jong Choi, Nam Kyung Kim, Woong Kirl Choi
It is not easy to analyze correlation to these factors.
Fundamental Theory of Polishing Wafer polishing is process combined mechanical factor with chemical factor.
Mechanical factors are associated with polishing pad, polishing grain and physical correlation on the wafer surface.
Robust design of Taguchi method is to minimize affects of noise by means of finding factors which have main influence.
Selected factors and levels are given in Table 2.
Online since: May 2014
Authors: V.L. Sordi, C.A. Rovere, S.E. Curi, Maurizio Ferrante, Andrea Madeira Kliauga
Mechanical and Corrosion properties of a F138 austenitic stainless steel after deformation by equal channel angular pressing A.M.
João Leme dos Santos km 110, 18052-780 Sorocaba, SP Brazil 2 Department of Materials Engineering, Federal University of São Carlos, Rof, Washington Luis Km 235, 13565-905 São Carlos , SP Brazil a kliauga@ufscar.br; b sordid@ufscar.br; c ferrante@ufscar.br; d carlosdrovere@hotmail.com; curi@ufscar.br Keywords: F138 austenitic stainless, ECAP, mechanical properties, corrosion resistance Abstract: A F138 austenitic stainless steel was solution heat treated, deformed by equal-channel angular pressing (ECAP) at 25 and 300oC.
Introduction Grain size is a key structural factor affecting nearly all aspects of the physical, chemical and mechanical behavior of metals.
Owing to no substantial change in outer dimensions it is easy to repeat the pressing form many times and get a large accumulated strain, which can be estimated by the equation: (Eq. 1) where φ and ψ are the corner angle and the die angle, respectively, and N is the number of passes [2] There are some studies on the microstructural evolution and mechanical behavior of 316L austenitic stainless steels processed by SPD. [4-6].
Online since: October 2013
Authors: Mei Shen Wang, Hong Ru Wang, Shuang Peng
The main factor to affect the spray is the amount of the mixed gas jet of the spray nozzle, and the impingement angle of jet of spray nozzle has a direct relationship with the mixed gas.
For roads, the site testing during the laying and the roadbed stability will be affected by water.
Factors of the harmfulness of industrial harmful substances to human health Dust particle size, composition and properties of hazardous substances, harmful content, harmful effects on the human body time workplace meteorological conditions, human labor intensity and individual factors.
Factors Factors: Imports wind speed, the feature of dusty gas, the rigor at the bottom of dust remover, the cylinder diameter and the exhaust pipe diameter, the cylinder and the cone height of cyclone.
Mechanical Engineering and Safety Engineering In mechanical engineering, machinery and mechanics also have a bond.
Online since: June 2012
Authors: Sung Chi Hsu, Huan Yang Chiang, Ji Yuan Lin
The properties of soil-cement materials are influenced by several factors, including type and proportion of soil, cementitious materials, water content, compaction, uniformity of mixing, curing conditions, and age of the compacted mixture.
Impacts of soil types, gradation of soils, and cement content on the mechanical properties of soil-cement mixtures are investigated.
Factors affecting the properties of soil-cement materials are studied.
Index properties of the eight soil types.
Pecker: Static and Dynamic Properties of Sand-Cement, J.
Online since: November 2014
Authors: Zhi Gang Chen, Huan Huan Xia, Jing Zhou
While there is a contradiction between the high mechanical strength and good conductivity.
In addition, also in mixing stage, lots of bubbles generate on the surface of carbon fiber and increase the porosity of concrete, resulting in reducing of concrete mechanical property.
The impacts of various factors on the basic properties of modified steel fiber conductive concrete are analyzed via orthogonal experimental design, and the optimal formula is established.
Experimental Material Properties.
The preparation process of conductive concrete seriously affects the dispersion of conductive filler in concrete matrix.
Online since: February 2012
Authors: Jan Ma, Ding Yuan Tang, Xian Peng Qin, Jian Zhang, De Wei Luo, Hao Yang, Qi Tu Zhang
Fabrication and properties of high quality transparent Ho:YAG ceramics Hao Yang1,2, Jian Zhang3,4,*, Xianpeng Qin3,4, Dewei Luo5, Jan Ma2,3, Dingyuan Tang5 and Qitu Zhang1,* 1College of Materials science and Engineering, Nanjing University of Technology, Jiangsu Nanjing 210009, China 2School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore 3Temasek Laboratory of Nanyang Technological university, Singapore 639798, Singapore 4Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China 5School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 *corresponding author: JIANZHANG@ntu.edu.sg; njzqt@126.com Keywords: Ho:YAG; Transparent ceramics; Reactive sintering method; Optical properties; Abstract.
The optical properties, microstructures and photoluminescence spectra of the fabricated Ho:YAG ceramics were investigated.
Compared with single crystal, Ho:YAG ceramic laser materials have several advantages such as improved mechanical properties, increased range of composition, fabrication of large size and high doping concentration, mass production as well as lower cost[6-8].
The microstructures including grain boundary, grain size and residual pores are considered as the main factors affecting the transmittance [11].
Numazawa, The physical properties of transparent YAG elastic modulus at high temperature and thermal conductivity at low temperature, Ceram.
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