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Discrete element simulation of machining cracks in brittle materials during high speed cutting Yong He1,2,a, Jun Zhang1,2,b *, Yifei Jiang1,2,c Hongguang Liu1,2,d, Wanhua Zhao1,2,e * 1School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, China; 2State Key Laboratory for Manufacturing Systems Engineering, Xi’an, China; ahyscdx@163.com, bjunzhang@mail.xjtu.edu.cn, cjiangyifei228@gmail.com dlhg.342723778@stu.xjtu.edu.cn, ewhzhao@mail.xjtu.edu.cn Keywords: Brittle materials; High speed cutting; Cracks; Stress wave; Discrete element method Abstract.
The dynamic process of cracks initiation in brittle materials during high speed cutting is primary for the analysis of material fracture mode and finished surface.
Furthermore, the stress state of particles’ connectors under the action of stress wave was analysed, which suggests that the stress wave is the key factor causing cracks initiation of brittle materials during high speed cutting.
Therefore, a further study on cracks initiation process of brittle materials during HSM is greatly significant.
It was found that the reason for cracks initiation during high speed cutting differs from conventional speed and stress wave is the key factor causing cracks initiation of brittle materials during high speed cutting.

[3] A.K.Mahalanabis: Introductory system engineering (New York, Wiley, USA 1982)
[5] G.Taguchi, E.Elsayed and T.Hsiang: Quality engineering in production systems (New York: McGraw-Hill College, USA 1989)
[7] E.Fricke and A.P.Schulz: Systems Engineering, Vol. 8 (2005) No.4
[11] H.F.Zhang, J.R.Tan, Y.X.Feng and Z.Y.Liu: China Mechanical Engineering, Vol. 18 (2007), No.18, p.2227-2232
[15] H,F,Teng, Y.S.Wang and Y.J.Shi: Chinese Journal of mechanical engineering, Vol, 42 (2006) No.11, p.1-8

School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou ,China 510640 2.
School of Material Science and Engineering, South China University of Technology, Guangzhou ,China 510640 alindong801＠126.com,bimzywen@scut.edu.cn Keywords：high-tech cement-based materials，silica fume，strength，pre-treatment， disperse，packing density Abstract.
Experimental Materials.
References [1] Tang Ming, Heng Jing: Journal of Shenyang Architectural and Civil Engineering Institute. 2005 (11), p.516~520 (in Chinese)
[2] Wen Ziyun, Qian Chunxiang:Concrete Engineering and Technology(Wuhan University of Technology Publication, Wuhan 2004)(in Chinese)

The detection of avalanche propagation in engineering change Rong Mo1,a, Zhongwei Gong1,b, Haicheng Yang1,c, Xin Zhang1,d 1The key laboratory of Contemporary Design and integrated Manufacturing Technology, Northwestern Polytechnical Univ., Xi’an, 710072, China amorong@nwpu.edu.cn, bcimsgong@hotmail.com, cHaichengyang@vip.sina.com, dzhangx0325@hotmail.com Keywords: engineering change; change propagation; avalanche propagation; directed graph; complex networks Abstract: In order to avoid avalanche propagation in engineering change that is high-risk and high-cost, two methods for the detection of avalanche propagation were proposed.
Change management in concurrent engineering from a parameter perspective[J].
Change and customization in complex engineering domains[J].
Engineering change propagation based on design structure matrix [J].
Topology of large-scale engineering problem solving networks [J].Physical Review E, 2004, 69:1-17

The Game Analysis of Quality Safety Behavior Subjects in Highway Engineering Huihong Feng1, a, Li Lu1,b , Jun Liu1,c 1 School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu, Sichuan, 610500, China afenghh163@163.com, b 1325969952@qq.com, c 425601059@qq.com Keywords: Highway Engineering, Quality Safety, Behavior Subjects, Game Analysis, Effective Management.
Introduction As a typical underground engineering construction projects, Highway project faced a number of technical and management risk.
Construction quality and safety of the highway project is still the key factor of the project management.
Journal of industrial Engineering and Engineering Management, 2012,26(4):199-204
System Engineering: Theory& Practices, 2001,(8):29-33

Zhao 1,b 1 School of Mechanical and Power Engineering, Henan Polytechnic University, Henan, China a jiaofeng@hpu.edu.cn, bzhaob@hpu.edu.cn Keywords: Ultrasonic lapping, Engineering ceramics, Machining efficiency, Material Removal rate (MRR) Abstract.
Introduction With the progress of the materials science technology, engineering ceramics play an increasingly important role in the modern manufacturing industries because of their superior physical and mechanical properties [1].
The experimental ZTA engineering ceramic is prepared by the Advanced Manufacturing Technology Institute of Henan Polytechnic University.
Materials mechanical properties are shown in Table 2.
Fig. 1 Experimental setup Fig. 2 Measurement device of radius variety Table 1 Experimental conditions Item Experimental conditions Equipment Self-developed ultrasonic lapping device Specimen Engineering ceramics ring(heat pressing); Materials: ZTA engineering ceramic; Size:φ120×φ80×20 mm.

Tissue engineering scaffolds are relatively new types of medical devices which are often made of quite fragile materials and are highly porous [15] meaning they are susceptible to physical damage during packaging and transportation [11].
The method chosen depends on the structure and materials of the device.
When designing a sterile packaging system for a new device the two key parameters to consider are: (1) the sterilisation method being used and (2) the structure and materials constituting the device.
Journal of Food Engineering, 1979. 44: p. 3. 18.
Chmielewski, Radiation treatment for sterilization of packaging materials.

Parallel Green Design of Machine Product Bao Zhang1, a * Tianhe Jiang2,b * Chuanhai Chen1 1 Bengbu Naval Petty Academy, Yanshan Road 1454, Bengbu,Anhui P.R.C 2 Harbin AirForce Aviation College, Heilongjiang, P.R.C azhbwrun@163.com, b14993305@qq.com Key word: parallel green design; green design; machine product Abstract: Concurrent green design of machine product proposed concurrent engineering method in the process of product design, reflect the green design idea, realize concurrent engineering and green design information sharing, so as to shorten developing period, reduce cost, enhance quality and protect environment.
Concurrent green design of machine product is, in full life-cycle design process, use concurrent engineering method, reflect the green design idea, realize concurrent engineering and green design information sharing, so as to shorten developing period, reduce lifecycle cost of product and enhance quality.
Figure 1 Concurrent green design model of machine product 1 connotation of Concurrent green design In essence, Concurrent green design is the advanced design technology union the green and Concurrent, presented the whole superiority in next several aspects: one is person integration, the work group include design engineer, technology engineer, salesman, serviceman, operate man, material engineer, environment engineer, and so on, worked coordinately, crossly and Concurrent.
Figure 2 The support environment component of Concurrent green design 1.1 Concurrent engineering The word of concurrent has two means, one is every procedure and all activities in it should working in parallel step.
The information includes files of CAD/CAPP/CAM/CAE, list of material, product order, cost of production, etc.

Study on the Heat Transfer in Granular Materials by DEM Jintao Wu, Yuqiang Dai, Zewu Wang, Fengxia Liu* School of Chemical Machine Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China wujt75@dlut.ed.cn, daiyuqiang@dlut.edu.cn, wangzewu@dlut.edu.cn, liufx@dlut.edu.cn Keywords: Heat transfer, DEM, Granular materials, Simulation.
Introduction Granular materials are widely used in the chemical industry with particulate engineering, design of powders, storage of grain flows, separation and granulation.
The DEM is a versatile technique, and as such is used in various simulation models in process engineering, mining, and geophysics.
Polyethylene (PE) particles are selected as granular materials.
Liu: Proceedings of the Chinese Society for Electrical Engineering, Vol. 23 (2003), p.161-165

New Trend in Facilities for the Elders in Japan ——Small Multi-care Facilities Xin Chen 1, a, Tian Zheng 1, b, and Yong Zhou 2, c 1 School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi’an, Shaanxi, 710129, P.R.
Design concept and key points in design Design concept.
Key points in design.
This concept and key points are good references for the planning and designing, operating and managing of the facilities for the elders in our country.
References [1] Architectural design data 106 Small multi-care facilities, edited by Institute of architecture/Building materials research society publishers, Japan (2006)