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The materials’ mechanical parameters are provided in Table 1.
Table 1 Mechanical physical parameters of bridge materials Materials Density (kg/m3) Elastic modulus (MPa) Poisson Ratio Thermal Expansion Coefficient (×10-5/℃) Steel Cable 7850 19500 0.3 1.2 C50 Concrete 2600 5000 0.23 Fig. 1 Bridge beam section Fig. 3 Finite element model of structure Fig. 2 Models of reinforced bridge and steel cables (a) Load position for Load case 1 (b) Load position for Load case 2 (c) Load position for Load case 3 Fig. 4 Three static load cases Result and Discussion Three load cases discussed above are investigated through FEM using ABAQUS software.
All of these results meet both the design and material strength requirements.
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Study on the Springback Characteristics of CR340LA Steel during the Typical Auto Part Stamping Process Hongying Gong1a, Jinyan Wang1b, Zhonghua Zhao1c 1.Shanghai University of Engineering Science, shanghai, China (201620) a. ghyyw@163.com, b. gerald_wang@163.com, c. zhaohua@sues.edu.cn Keywords: Stamping processing, Springback, Computer numerical simulation, Auto part ABSTRACT: Metal sheet Stamping forming is an important material forming process, especially in the automobile industry.
The blank material is applied a kind of high-strength steel (metal brand: CR340LA), the material parameters showed in table 1.
Table.1 The material parameters of the auto indoor-still part Material Brand Thickness （mm） Yield strength （MPa） Tensil strength （MPa） Elongation （%） R N CR340LA 1.0 340 410 44 1.87 0.13 Fig.1 The FLD of the auto indoor-still part after stamping processing According to the forming limited diagram of the auto indoor-still part after stamping processing shows in Fig.1, the whole forming condition of the drawing part is good, its deforming is equally distributed, the fracture never occurred, only has a little wrinkles in some sections, but these sections are mostly distributed in the binder section, so have no great affect to the whole part forming quality.
Acknowledgment Financial support from project supported by the Shanghai Educational Committee Funds Key Project (project number: 09ZZ192) and Youngmen' scientific research funds project of Shanghai University of Engineering Science（project number: 2009XY07） References [1] Zheng, Peng, Han, Fang-Fang; Jiang, Tong, Research on numerical simulation for automotive panel forming and spring-back based on Dynaform, Journal of Shenyang University of Technology, Vol. 31( 2009), p548-552 [2] Zhang Huotu, Li Yanping, Li Yi, Research on the effect of process addendum in sheet metal forming based on numerical simulation, Cailiao Kexue yu Gongyi/Material Science and Technology, Vol.18(2010), p238-241 [3] Tang Bingtao, Lu Xiaoyang, Zhang Yu, Efficient strategy for stress distritution in inverse v analysis of sheet metal stamping, Chinese Journal of Computational Physics, Vol.25 (2010), p 585-590 [4] Duan Le, Miao Dehua, CaiYujun, Qu Zhoude,Li, Zhen, Research on numerical simulation for automotive
panel forming and spring-back based on Dynaform, Proceedings - 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, Vol. 3 (2011), p55-58 [5] Liu, Bai,Zhou, Yongquan; Liu, Mingjun; Zhao, Zhenyu,Numerical analysis and optimization of stamping technology for electrical motor's cover, Advanced Materials Research, Vol.97 -101 (2010), p315-319

The effect is most heavily pronounced in the micro- and nanostructured materials with high surface-to-volume ratio [4,6-7].
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Acknowledgement The results were obtained in the course of project implementation with the financial support of the Ministry of Education and Science of Russian Federation, contract №02.G25.31.0076.
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Acknowledgement This work is supported by National Major Scientific and Technological Support Project （2011BAG07B03）and National Natural Science Foundation of China (51008131).
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The structural adhesive will lose adhesion due to high temperature, and then the reinforcement materials will be out of work.
Thermocouples were arranged under the reinforcement materials.
(2)The function of fire-resistant coating to specimens was same, and it had nothing to do with the reinforcement materials
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As the second hardest material, CBN (cubic boron nitride) is suitable for grinding hardened materials, e.g. hardened D2 mold and die steel [2].
Acknowledgements The research is supported by the National Science Foundation of China (NSFC: E 51305229), Beijing Municipal Science & Technology Commission (NO.
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Materials and methods Three soil sampling sites were chosen for each kind of plant community (Tamarix chinnensis, Phragmites australis and Suaeda salsa) in the Yellow River Delta in August of 2007.
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Materials and methodsOrganization of the Text Stress strain analysisSection Headings.
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Drilling can be applied to various workpiece materials [1].
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