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Acknowledgments This work was supported by Chinese Nature Science Fund (No.50875033).
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Superplasticity is known as a phenomenon of solid materials that can show a very large plastic deformation at high temperatures.
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This effect was firstly found by Doctor Kaiser from metal materials in 1950’s and was named as Kaiser Effect.
As far, Kaiser Effect has been found in many materials and is wildly used to assess the material defects and stresses which had suffered.
Acknowledgment This work is supported by National Natural Science Foundation of China (Grant No: 51075309).
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Particularly in cold forging, materials with high formability that can accommodate severe deformation are required [2].
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The model not only considers the spatial structure of three unit cell, but also considers effect of bending and the different section shape on the elastic properties of materials among three unit cells.
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Factors of influence on the distribution of heat of hydration Concrete is a heterogeneous material of which components have different thermal properties.
L., “A Study on the Evaluation of Thermal Stress of Massive Concrete Structure”, Journal of Korea Concrete Institute, Vol.7, No.2, 1995, pp.126~135
B., “Development of Temperature-analysis Program for Mass Concrete Using Finite Element Method”, Journal of Korea Concrete Institute, Vol.7, No.6, 1995, pp.167~175
I., “Factors for Hydration Heat and Thermal Stress in Mass Concrete”, Journal of Korea Concrete Institute, Vol.9, No.3, 1997, pp.15~23
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Conclusion Materials and energy efficiency, the final tolerances of the product and the production speed are the areas of optimization for the mandrel bending of elbow pipes.
Liu, Numerical simulation and parameter optimization of hot pushing elbow pipe bending process, Applied Mechanics and Materials, Vol. 432, 2013, pp. 92-97
Colas, Forming of seamless pipe fittings, Journal of Materials Processing Technology, Vol. 120, 2002, pp. 432-437
Martinez, Finite element model simulation of hot forging of seamless elbow fittings, Proceedings of the Institution of Mechanical Engineers Vol. 219, Part L: Journal of Materials Design and Applications, 2005, pp. 85-90
Trasca, Hybrid modeling of Material Properties for Improved CAE-Simulations, Materials Science Forum, Vol. 854, 2016, pp. 163-166.

Experiment Main materials.
The materials did not have ferrimagnetism.
The absorbing property of materials enhanced.
Beijing: Science Press, 1962:19
Journal of Magnetism and Magnetic Materials, 2004: 207-214

Introduction In the case of the composite materials, due to the complicated internal structure, the important problem is the effective detection and localization of the flaws, which are on the early stage of the nucleation.
The material possess the quasi - isotropic mechanical properties.
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