Search results

Laser-assisted Machining of Advanced Materials Xianjun Kong1, a , Hongzhi Zhang 2,b, Xuefeng Wu 3, c, Yang Wang 4,d* 1,2,4School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China 3, c School of Mechatronics Engineering, Harbin university of science and technology, Harbin, China 1,aemail: kongxianjun.2008@163.com, 4,d*email: wyyh@hit.edu.cn Key words: Laser-assisted machining; difficult-to-machine material; future scope Abstract: Laser-assisted machining (LAM) is a hybrid cutting process in which a laser beam is used to heat and soften the workpiece locally in front of the cutting tool edge.
Introduction Advanced engineering materials, such as nickel/titanium-based superalloys, hardened steels, ceramics, and metal matrix composites, have been and are still being researched and developed to meet the increasing requirement of higher strength especially in the aerospace industry[1,2,3].
Table 1 shows us the key results.
[2] Chryssolouris G, Anifantis N, Karagiannis S, Laser assisted machining: an overview, Journal of manufacturing science and engineering, 1997, 119(4B): 766-769
[10] Boyer R R, An overview on the use of titanium in the aerospace industry, Materials Science and Engineering: A, 1996, 213(1): 103-114

Due to the material, technology and other constraints for waterfront building sketches, featuring regional materials and local construction techniques become a key in material construction.
The adoption of Engineering-Composite-Material for Bamboo technology can makes bamboo into new environmental protection building materials which can be widely promoted.
Journal of Structural Engineering，2004，130 (9) :1353 － 1360
Journal of Structural Engineering，2004，130(9) : 1361 － 1370
Wood Engineering and Construction Handbook ［M］. 3rd Edition，McGraw-Hill，New York，1997

Outstanding civil engineer is important to train many engineering colleges in the new situation.
Civil engineering to reform and adjust, in order to adapt to "the excellence program" requirements, has become a key emphasis of university workers in work[1-2].
The 9 experimental projects were covered by the basic characteristics of raw materials, material composition design, structure, performance and safety performance, characteristics and construction process, comprehensively relates to the whole process of Engineering project.
The essence is to cultivate engineering ability, practical ability.
[2] Xia Song，Tan Ai-min．The reform trend seen from "The Excellence Engineer Education plan" of civil engineering major in local colleges and universities [J].

It is given analysis of the key issues of technology, and hopes to provide reference with the grouting reinforcement of engineering practice.
Grouting Materials and Their Application Cement material is the most widely used in grouting.
Nearly four decades, China has developed and applied a number of chemical pulp materials, which is shown in Table 1.
“Geotechnical engineering chemistry. ” Science Press.
Rock Mechanics and Engineering Journal,20 (6) ,839-841.

Geotechnical engineering intelligent monitoring and controlling system and its application in pit engineering Youfeng Zhang1,2,a, Meifeng CAI1,b 1 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China 2 School of Application Sciences, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 341000, China ayoufengzhangok@126.com, bcaimeifeng@ustb.edu.cn Keywords: Modern Geotechnical Engineering, Intelligent Monitoring and Controlling System, Deep Pit Engineering, Remote Monitoring and Controlling Abstract.
Therefore, multifarious monitoring technology aiming at the measurements of displacements, stress, strain and deformations of rock mass and soil become a key part in geotechnical engineering constructions, evenly exerting deep impacts on the whole engineering system.
Applications of intelligent GEMCS in pit engineering It has become a consensus that intelligent GEMCS should be employed to monitoring the pit engineering construction.
Zhang[5] established a object-oriented model for deep pit engineering.
The boom and organic integrations of modern computer technology, new materials technology and network technology supply an opportunity and a clew to establish such a GEMCS.

Analysis and Modeling of the Thermal Errors of Carriage System of a Precision Machine Tool Driven by Linear Motor Shuai Yuan1,a, Fangyu Peng1,b, Lin Zhou1,c, Peifeng Yao1,d 1 National Numerical Control System Engineering Research Center, Huazhong University of Science and Technology, Wuhan 430074, China axiaoshuaihust@hotmail.com, bzwm8917@263.net, czhoulin_1107@126.com dAlexpdf@163.com Keywords: Linear motor, Thermal model, Thermal key points, Genetic algorithm Abstract.
(8) Where Lg is the thickness of the void space between the contact surfaces of the primary part and carriage, Ac is the real contact of the joint, Av is the void area of the joint, k1, k2, kf are the thermal conductivities of the materials of the two parts and the medium, respectively.
Zhu: Chinese Journal of Mechanical Engineering, Vol. 39 (2003) No 3, pp. 81-84, (In Chinese)
Ziegert: Precision Engineering, Vol. 24 (2000) No 3, pp. 338-346
Lu: Journal of Mechanical Engineering, Vol. 47 (2011) No 13, pp.175-179, (In Chinese)

Feasible Study of Fire-resisting Wood Material in Habitability Design of Large Surface Vessels Wenbo Zhanga, Fenghu Wangb,Bing Liuc College of Material Science and Engineering , Northeast Forestry University,Harbin, P.R.
Wood because of its unique texture, color, smell has a good affinity with the people is to improve the living conditions of very rational ship materials, Can the wood material applied on a large surface ships, the key is fire prevention.
So for better use of wood, its flame-retardant research has not been idle. study of wood fire can be traced back Roman times, thirties of this century, improved of wood into the fire-retardant wood materials technology, In engineering and academia widespread attention; In recent years, a reference to the advanced analytical instruments and progress in technical areas related disciplines, Research on wood fire both theoretical research, technology research or product development, product improvement have made remarkable achievements.
Department of Energy "plant-based renewable resources and food technology roadmap, by 2020 the basic chemical building materials in the plant-based materials, renewable resources to reach 10% by 2050 to reach 50%" (Mohanty.2002).Visible from the plant material and other renewable resources will be the main force of the future development of materials science, Bio-based composite Panel will be the future development trend.
However, the natural defects of wood that also has its flammability, Improved of wood into the fire-retardant wood materials technology, in engineering and academia widespread attention.

Now retroreflective materials are used widely in traffic field.
But as for retroreflective materials of horizontal coatings, using handle instrument is common.
Retroreflective performance is the key technical index of retroreflective materials.
The key index of the components is listed as follows.
[4] Yuan-yuan Bai and Chuan-zheng Zhu: China Illuminating Engineering Journal Vol.21 (2010), No. 5, p.7 (In Chinese).

Development and Application of 16MnR Materials Database of Pressure Vessel in Software DEFORM-3D Bolin Hea, Wang Binb School of Mechanical & Electrical Engineering, East China Jiaotong University, Nanchang, China ahebolin@163.com, bwangbinhappy131415@163.com Keywords: finite element simulation, materials database, 16MnR steel, pressure vessel Abstract.
However, DEFORM-3D built-in material database has the defect that often encounters the materials not needed or the disunity of alloy brand, which seriously hinders the application of finite element simulate software in the engineering project.
It is widely used in machinery, vehicle, shipping, bridge industry and some welded structured in cryogenic engineering machinery.
Development and application of materials database of finite element simulation software DEFORM, Materials Riview, 2011, 25(4): 131-132(in Chinese)
[12]The academy of China mechanical engineering research, compile commissioning of China material engineering dictionary, dictionary of China material engineering, Volume 4: Nonferrous metal material engineering, Chemical Industry Press, Beijing, 2005(in Chinese)

Preparation of Porous Polycaprolactone Scaffolds by using Freeze-drying Combined Porogen-leaching Methods Chengyun Ning1,2,a, Haimei Cheng1,4, Zhaoyi Yin 1,4, Wenjun Zhu 3, Hao Chen2, Shumei Lei1,4, Shiheng Yin1,4, Huaguo Liu1 1 College of Materials Science and Technology, South China University of Technology, Guangzhou 510641, China 2 Wenzhou Medical College, Wenzhou 325035, China 3 Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510060, China 4 Key Laboratory of Specially Functional Materials of Ministry of Education, Guangzhou 510641, China a imcyning@scut.edu.cn Keywords: Pore size; Scaffold; Polycaprolactone Abstract.
The microstructure of scaffold was one of key factors for tissue engineering.
Introduction For tissue engineering, 3-D porous biodegradable scaffold play an important role to guide cell attachment, proliferation and tissue regeneration[1-3].
Chen, et al.: Key Engineering Materials.
-Materials Science.