Search results

Nunes2 1Mechanical Engineering Dept., Minho University, Campus de Azurem, 4800-058 Guimaraes, Portugal, e-mail: a46979@alunos.uminho.pt 2Polymer Engineering Dept., Minho University, Campus de Azurem, 4800-058 Guimaraes, Portugal Keywords: FEM; carbon fibre; composite, laser cutting equipment Abstract.
In fact, carbon fibre reinforced polymer matrix composites (CFRP) are presently quite use in many advanced applications (such as, sport, space and military aircraft industries) and start now to be applied in civil aviation and manufacturing industries.
For any application, replacing traditional materials by new ones involves, at least, the following relevant engineering tasks [2]: 1.
The diagram in Figure 1, shows the main steps needed to implement a good engineering redesign of a composite product by considering the loading and boundary working conditions that the structural product is submitted.
Mazumdar,Composites Manufacturing : Materials, Product, and Process Engineering.

According to the situation, many scholars have researched laws of segment joint with numerical calculation method, and have got some research results that can be used as reference for the engineering reality[4,5,6].This paper take Tianjin metro No.3 line tunnel segment joint as the study object and construct three dimension finite element model of the segment joint by general finite element software ANSYS, focus on the relationship between the joint bending moment and the joint angle, and then get laws of segment stiffness variation in order to provide reference for the segment design.
Conclusion Analysis the calculated results of joint bending moment and angle in different load combinations of eccentricity by building three dimension finite element model of shield tunnel segment joint, and compared with related test data, theoretical analysis results and relevant engineering experience in other literatures.
(1) Linear fitting to the relation curve of joint angle and bending moment is feasible and the joint flexural rigidity obtained can be used for reference in engineering practice.
Chen: Guang Dong Architecture Civil Engineering, Vol. 12 (2007) No.12, pp. 43-45.
Wang: ANSYS Engineering Structure Practical Case Analysis (Chemical Industry Press, China 2007).

Field Monitoring of Segments Deformation during Metro-station Construction Based on Shield Tunneling Tao Li1, a , Yingchao Liu 1,b , Bo Liu 1,c , Weihong Yang1,d, Yang Liu1,e 1School of Mechanics & Civil Engineering, China University of Mining & Technology, Beijing 100083, China alitaocumtb@163.com, bliuyingchao111@163.com, cdr_boliu@163.com, d ywhcumtb@163.com, e403151291@qq.com Keywords: Getting rid of the segments; Field monitoring; Connecting seam opening length; Tunnel convergence; Bolt internal force Abstract: To ensure the influence degree on the environment during constructing metro-station based on shield tunneling is very important in the subway construction.
One aspect is settlement calculation[1,2], and there are many methods on the prediction of the ground surface settlement due to the shield tunnel construction, and Peck method is a representative empirical formula.The engineering analogy method and numerical method are two representative methods[3-6].
Therefore, to ensure the safety of the engineering, the 13 rings most close to the dismantling section must be reinforced.
As there is no precedent construction about this kind of reinforcement measures, to ensure the smooth progress of the excavation engineering, it is necessary to monitor the tunnel structural internal force and deformation in the reinforced section.
Tunneling in soils-ground movements, and damage to buildings in Workington, UK [J] .Geotechnical and Geological Engineering, 1999, 17( 3) : 351-371

Semiactive Wind Response Control of 76-story Benchmark Building with Smart Piezoelectric Friction Dampers Ping Dong1,a Jian Fan1,b 1School of Civil Engineering and Mechanics, Huazhong University of Science and Technology Key Laboratory of Structural Control of Hubei Province, Wuhan 430074 China apeterd2000@sina.com bfan-jian@126.com Key words: Smart piezoelectric friction damper; Benchmark model; Wind response; Semiactive control; Optimization Abstract: A smart piezoelectric friction damper (SPFD) is presented based on improved Pall friction dampers and its damping force model is analyzed.
Proceedings of the 14th ASCE Engineering Mechanics, Division Specialty Conference,Austin,Texas,2000, p. 21-24 [2] G.
Earthquake Engineering and Engineering.
Structural Engineering, Vol. 127(2001), p. 861-868 [7] J.

Numerical Simulation of Railway Track Irregularities Based on Stochastic Expansion Method of Standard Orthogonal Bases Hengbin Zheng1, a, Quansheng Yan1,b, Junliang Hu1,c and Zhou Chen1,d 1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong, 510640, China ahbzh1984@126.com, bcvqshyan@scut.edu.cn, chujunliang1@126.com, dgsczcz@163.com Keywords: Hartley orthogonal bases, Stochastic process, Orthogonal expansion method, Track irregularities Abstract.
Generally, the PSD function such as railway track irregularities PSD in engineering field is obtained by fitting the measured data.
Huang: Journal of Traffic and Transportation Engineering, Vol.6, No.1, 29-33, 2006 (In Chinese)
Li: Journal of Vibration Engineering, Vol.21, No.1, 96-100, 2008 (In Chinese)
Liu, “Orthogona expansion Method of Engineering Stochastic Dynamic Loads and Its Application”, Doctoral Dissertation, Shanghai, Tongji University, 36-48, 2007 (In Chinese).

Experimental and Finite Element Analysis on the Ultimate Bearing Capacity of Hollow Spherical Joints with Ribbed Stiffener Jiangtao Yu A , Kequan Yu , Bo Tang Research Institute of Engineering and Disaster Reduction, Tongji University, Shanghai, China aYujiangtao@tongji.edu.cn Keywords: Hollow Spherical Joint; Ultimate Bearing Capacity; Ribbed Stiffener; Influence Factor Abstract.
For safety, the engineers are always prone to select the conservative one.
The engineering background of this test is the construction the diving natatorium of QingDao.
(in Chinese) [7] Qinghua Han, Yandong Pan, Xiliang Liu:China Civil Engineering Journal Vol. 36 (2003), p.1.
Journal of Zhejiang University(Engineering science).

Comparison between optimization method and experience-based method in soil conservation Yuan, Feng1, a, Jixian, Wang2,b 1School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2Xuchang Vocational Technical College, Xuchang 461000, China afengyuan.energy@gmail.com, bwangjixian1990@163.com Keywords: Soil conservation; Slope stability; Limit equilibrium; Genetic algorithm; Fellenius method Abstract.
Furthermore, it has indispensable advantages in field engineering.
Fellenius method is a traditional method which is based on the experience of the field engineer.
Qiang: Chinese Journal of Rock Mechanics and Engineering, Vol. 4(1995)
Soil mechanics and foundation engineering [Z].

Steady Thermal Stress in a Ceramic/FGM/Metal Composite EFBC Plate Considered Temperature Dependency Yangjian Xu1,a, Daihui Tu2 and Jianhui Jia1 1School of Civil Engineering, Hebei University of Engineering, Handan 056038, China 2School of Science, Hebei University of Engineering, Handan 056038, China axuyangjian@sohu.com Keywords: Ceramic/FGM/metal plate; Steady thermal stress; NFEM; EFBC mechanical boundary Abstract.
Introduction A functionally graded material (FGM) that decreases thermal stresses has been developed for structural components and/or mechanical elements such as nuclear, aircraft, and space engineering, and so on, it is important to analyze the thermal stress filed problem of the body made of the material, especially the problem considered temperature dependency [1-2].
We hope that the analytical results obtained will be more close to actual engineering conditions and to obtain some instructive conclusions for the production and application of ZrO2/FGM/Ti-6Al-4V composite plate.

Structure Buckling Non-probabilistic Reliability Index Calculation of Ventilated Supercavitating Vehicles Ling Zhou1,a, Weiguang An1,b and Hai An1,c 1 College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, China a zhouling@hrbeu.edu.cn, banweiguang@hrbeu.edu.cn, canhai@hrbeu.edu.cn Keywords: ventilated supercavitating vehicles; thin cylindrical shell with stiffened rings; semi- analytical FEM; Chaos optimization algorithm (COA).
And then we can control indefinite degree of each interval variable better in engineering for high structure reliability of supercavitating vehicles.
Journal of Harbin Engineering University, 2008, 29(7): 683-686
Journal of Harbin Engineering University, 2009, 30(4): 362-367

Test study on the heterogeneity of coal and model of coupled gas flow and deformation process Yu Yongjiang1,a ,ZHANG Chun-hui 1,b,ZHANG Chun 3,c 1Department of Mechanics and Engineering Science of Liaoning Technical University Fuxin,123000, China 2School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang 050018,China 3Polytechnic Colleg, Hebei University of Science and Technology, Shijiazhuang 050018, China; ayuyongjiang001@163.com，b zhangchunhui789@163.com, czhangchun@163.com Key words: Test study, Weibull distribution, heterogeneity of coal Abstract: In order to obtain the heterogeneity of coal, the mechanical tests were performed.
In rock mechanics and engineering, in what appears to be the first description of the heterogeneity of rock from a statistical viewpoint, Scholz (Scholz, 1968) used an analysis of the elastic waves radiated by the process of rock fracture.
Elastic modulus Tension strength Uniaxial compressive Strength 1 976 0.44 2.68 11 1 285 0.65 3.63 21 1 209 0.53 2.82 2 887 0.46 2.84 12 1 135 0.49 2.78 22 1 389 0.35 5.43 3 928 0.60 2.68 13 1 044 0.50 3.99 23 721 0.26 2.75 4 866 0.43 3.07 14 1 013 0.60 3.84 24 977 0.29 3.17 5 915 0.64 3.13 15 745 0.44 1.68 25 754 0.34 1.88 6 895 0.45 2.90 16 1 372 0.71 3.91 26 763 0.49 2.52 7 1 205 0.60 3.81 17 948 0.41 2.62 27 895 0.43 1.56 8 1 324 0.58 4.13 18 1 061 0.63 2.73 28 813 0.37 2.66 9 1 197 0.40 3.66 19 776 0.32 2.56 29 1 186 0.55 2.33 10 744 0.45 1.72 20 950 0.48 3.48 30 844 0.36 1.57 In rock mechanics and engineering, the mechanical parameters such as elastic modulus, tension strength, etc. are supposed to have Weibull distribution.
Chinese Journal of Rock Mechanics and Engineering, 27(6): 1 370-1 379.