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Materials Science Forum Vols. *** (2004) pp.396-400 online at http://scientific.net  2004 Trans Tech Publications, Switzerland Study on the Thrust Cutting Force in Ultrasonic Elliptical Vibration Cutting C.X.
Moriwaki 3,c 1School of Mechanical Engineering, Shanghai Jiaotong University, China. 2Faculty of Engineering, Nagoya University, Japan. 3Faculty of Engineering, Kobe University, Japan.
It is defined by: Materials Science Forum Vols. *** 397 1 ( ) ( ) ( ) 1 ( ) ( ) 0 ( ) ( ( 1) ) b i i e e b t nT t t nT h t t nT t t nT t nT t t n T + ≤ < +   = − + ≤ < +   + ≤ < + +  （1） where h(t)=1 when the friction between the rake face of the tool and the chip acts in the normal direction, h(t)=-1 when it is reversed and h(t)=0 when the tool is separated from the chip and the workpiece.
The thrust cutting force Fevcy in three-dimensional ultrasonic elliptical vibration cutting can be given by: γo ac ach ф λ λ-γo v Workpiece Tool Chip Fc Fn Ff Fs Fns Fr Ft ф+λ-γo Fr Fig.1 Orthogonal cutting model of the elliptical vibration Tool Chip Fz Fn Ff γo ac ф vc Fx ψ (ψ + vc) Ft Fy Workpiece ap s Ft Fig.2 Three-dimensional cutting model of the elliptical vibration Advances in Materials Manufacturing Science and Technology 398 cos( ) ( ) sin( ) ( ) sin cos( ) p s evcy c a s F t v h t τ λ γ ψ φ φ λ γ − = + + − (3) where ap is the depth of cut, s is feed rate, ψ is tool approach angle, vc is angle of chip flow.
Workpiece Material Aluminum(52S) Tool Material Carbide Rake angle -5º Clearance angle 12º Approach angle 65º Nose radius 0.1 [mm] Cutting conditions Depth of cut 0.05 [mm] Feed rate 0.025 [mm/rev] Cutting speed 3.94~18.3 [m/min] Vibration conditions Locus Circle(Radius:3.5 [µm]) Linear(amplitude:3.5 [µm]) Resonant frequency 18.66 kHz Table 1 Experimental conditions Advances in Materials Manufacturing Science and Technology 400 Conclusions The positive and negative pulsating thrust cutting force is generated in each cycle of elliptical vibration cutting.

Gao1,d 1School of Mechanical Engineering, Shandong University, Jinan, 250061, P.R.China amengjf@sdu.edu.cn, bljf@sdu.edu.cn, cpqge@sdu.edu.cn, dgaow@sdu.edu.cn Keywords: Removal mechanism, Wire-sawing, Hard-brittle material Abstract.
Materials Science Forum Vols. *** 193 Through microindentation techniques, T.
Materials Science Forum Vols. *** 195 Experiments and Discussions Wire-sawing experiments were conducted on a endless wire-saw machine.
Li, et al: Chinese journal of mechanical engineering Vol. 37(2001), p. 1 [2] X.B.
Scattergood: Journal of Engineering for Industry Vol.113(1991), p. 184 Fig.4 SEM picture of chips in wire-sawing(2000x) Fig.3 SEM picture of granite in wire-sawing(10x) Advances in Materials Manufacturing Science and Technology 196 [6] J.X.

The decisive way in creating the novel progressive materials is the technologies introduction for the synthesis of multifunctional coatings that combine a large amount of advanced technological properties, namely: corrosion resistance, hardness, durability and catalytic activity.
Kurska, Investigation of the Processes of Formation of a Fire Retardant Coating, Materials Science Forum, 1038 (2021) 480–485
Bezuglov, Mathematical modeling of fire-proof efficiency of coatings based on silicate composition, Materials Science Forum, 1006 (2020) 70–75
Savchenko, Thermodynamic Study of Fire-Protective Material, Materials Science Forum, 1038 (2021) 486–491
Shkolnikova, Studying the insulating properties of oxide films obtained on the Ti6A14V alloy in tartaric acid solutions using the method of electrochemical decoration by copper, ARPN Journal of Engineering and Applied Sciences, 15(15) (2020) 1657–1665

Alberto Lamego, 2000, 28013-602, Campos dos Goytacazes/RJ, Brazil. 3IME - Military Institute of Engineering, Department of Materials Science, Praça General Tibúrcio, 80, 22290-270, Rio de Janeiro/RJ, Brazil.
Forum Vol. 820 (2015), p. 419 [5] A.
Monteiro: Materials Science Forum Vols. 798-799 (2014), p. 548
Vieira: Materials Science Forum Vols. 727-728 (2012), p. 1057
Monteiro: Materials Science Forum Vols. 775-776 (2014), p. 69

School of Environment and Chemical Engineering , Heilongjiang University of Science and Technology, Harbin 150022, China. 2.
The first problem is selection of the topic, such as teachers often give virtual design topics which are detached from engineering for students to choose.
Then they will transform from students to the one who is engaged in engineering technology or engineering management and advance into the production practice.
Then the teacher timely modify teaching content according to the latest policy and technical guidelines This not only maintains advanced and timeliness of the curriculum content, but also can take the requirements of qualification test and the test content into consideration.
Du, Explore integration of civil engineering majors employment, graduation practice and graduation design, China Electric Power Education, 32 (2012) 107-109.

Comparison of Lipase-Catalyzed Synthesis of Cyclopentadecanolide from Malana Oleifera Chum under Organic System and Biphasic System Fang Shen a,Xiongmin Liu b College of Chemistry and Chemical Engineering, Guangxi University, 100 Daxue Street, Nanning 530004, Guangxi Province, PR China aemail:nnbonnie@126.com, bemail:xmliu1@gxu.edu.cn Keywords: Lipase; Cyclopentadecanolide; Malana Oleifera Chum; Biphasic System;Ultrasonic Abstract.
As a biocatalysis, enzyme has high efficiency, high selectivity and high specificity in synthesizing macrolide under moderate conditions, which has been widely used in the fields of organic synthesis, fine chemical engineering and food processing [3-5].
Forum Vol. 12 (2001), p.41-47 [9] S.
Forum Vol. 25 (2003), p. 83-87 [11] I.
Gatfield and N.Y.Ann: Advances in Biochemical Engineering/Biotechnology ( Springer Berlin / Heidelberg,1997)

The Deformation of Discontinuity in the DDA Method Jun LIU 1, a and Zhongkui LI2, b 1 Beijing municipal engineering research institute, Beijing, China 2 Department of hydraulic engineering, Tsinghua university, Beijing, China a liujun01@tsinghua.org.cn, blzk-dhh@tsinghua.edu.cn Keywords: DDA; The deformation of discontinuity; Displacement; Stress.
The actual engineering indicates that the deformation of control discontinuity is often greater than that of block, and can not be neglected; but the deformation of the smaller discontinuities may be neglected.
Introduction The jointed medium like rock masses will be encountered in many engineering problems, where discontinuities are dominant.
Tsui: Advancements in discontinuous deformation analysis. 9th International Conference on Computer Methods and Advances in Geomechanics.
C.Chern: The Development of DDA with Third Order Displacement Function, Proc. of the First International Forum on Discontinuous Deformation Analysis (DDA) and Simulations of Discontinuous Media, Berkeley, CA, 342-350 (1996) [4] B.Amadei Chihsen Lin and Jerry Dwyer: Recent Extensions to the DDA Method, Proc. of the First International Forum on Discontinuous Deformation Analysis (DDA) and Simulations of Discontinuous Media, Berkeley, CA, 1-30 (1996) [5] Te-Chih Ke: Artificial Joint-Based DDA, Proc. of the First International Forum on Discontinuous Deformation Analysis (DDA) and Simulations of Discontinuous Media, Berkeley, CA, 326-334 (1996) [6] J.

Burger: Materials Science and Engineering.
Jung: Materials Science and Engineering.
Feng: Material Science and Engineering.
Nakata: Material Science and Engineering.
Mishra: Material Science and Engineering.

Materials Science Forum Vols. *** (2004) pp.620-624 online at http://scientific.net  2004 Trans Tech Publications, Switzerland Research on Surface Quality Control of Moulds Formed by Plasma Arc Spraying Q.L.
Hu 1,f 1 College of Mechanical and Power Engineering, SJTU, Shanghai, P.R.
In order to remove the moisture, the powders should be roasted in oven for about 2 Materials Science Forum Vols. *** 621 hours and the temperature is about 110℃ before plasma arc spraying.
master mould work mould work mould master mould Advances in Materials Manufacturing Science and Technology 624 The operation of machining method is very difficulty when the pattern of work moulds is very fine.
Wu: Handbook of Aviation Manufacturing Engineering-Special Manufacturing Fascicule (Aviation Industry Publishing House, Beijing 1993) [2] Q.L.

Preface International Symposium on Advanced Materials (ISAM) has gained respect in the scientific community with consistent hard work of its organizers for more than thirty years.
This volume contains forty-eight peer-reviewed papers selected from more than 200 presentations made at the forum of ISAM by the local and foreign speakers.
Similarly, a handsome number of applications of these advanced materials have also been highlighted in the text of proceeding.
The proceeding will be available online in Key Engineering Materials, a publication of Trans Tech Publications Ltd (TTP).
Muneeb Asim Secretary Symposium ISAM 2019 Committees Organization Committee Tahir Ikram Chairman Muhammad Muneeb Asim Secretary Amjad Ali Treasurer Syed Willayat Hussain Hamid Zaigham Sara Qaisar Iftikhar us Salam Zubair Ahmed Muhammad Shoaib Shabbar Abbas Rizvi Aamir Nusair Tayyab Subhani Secretariat Committee Amjad Ali Rehan Qayyum Shahab Bhatti Mohsin Abbas Technical Committee Mustasim Billah Bhatty Muhammad Mansoor Noveed Ejaz Ahnaf Usman Zillohu Hamid Nawaz Co-Organizers National Center for Physics, Pakistan Institute of Space Technology, Pakistan Sponsors ENAR, Pakistan Peoples Steel Mills Ltd, Pakistan Engineering Horizons, Pakistan Chenab Engineering, Pakistan Analytical Measuring Systems, Pakistan Sowan Enterprises, Pakistan Ibne-Sina institute of Technology, Pakistan ALCO Valves, Pakistan