Luan Yiguo

Shandong University

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Zhao Guoqun

Shandong University

Yanjin Guan

Shandong University

Chao Zheng

Longdong University

Niu Shanting

Shandong University

Guoqun Zhao

Shandong University

Libin Song

China Special Equipment Inspection and Research Institute

Sheng Sun

Foshan University

Huiping Li

Shandong University of Science and Technology

Shubo Xu

Shandong Jianzhu University

Zhong Ji

Shandong University

Cooperative Institutions

Shandong University

Ministry of Education of the People's Republic of China

Shandong University of Technology

University of Science and Technology of China

Huazhong University of Science and Technology

Shandong Jiaotong University

China University of Petroleum, Beijing

Xi'an University of Science and Technology

Xiamen University

Tianjin University

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Numerical studies on processing routes and deformation mechanism of multi-pass equal channel angular pressing processes

Journal of Materials Processing Technology (2006)

Shubo Xu Guoqun Zhao Luan Yiguo Yanjin Guan

10.1016/j.jmatprotec.2006.03.167

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Citations (47)

INVERSE HEAT CONDUCTION ANALYSIS OF QUENCHING PROCESS BASED ON FINITE ELEMENT AND OPTIMIZATION METHOD

Acta Metallurgica Sinica (2005)

Luan Yiguo

The calculation of surface heat transfer coefficient during quenching process is one of the inverse heat conduction problem, and it is a nonlinear and bad-posed problem. A new method to calculate the temperature-dependent surface heat transfer coefficient during quenching process is presented, which applies finite element method (FEM), advance-retreat method and golden section method to the inverse heat conduction problem, and can calculate the surface heat transfer coefficient according to the temperature curve gained by experiments. In order to apply the advance-retreat method to inverse heat conduction problem during quenching process, the arithmetic is improved, so that the searching interval of optimization can be gained by the improved advance-retreat method. The optimum values of surface heat transfer coefficient can be easily obtained in the searching interval by golden section method. During the calculation process, the phase-transform volume and phase-transform latent heat of every element in every time interval can be calculated easily by FEM, the temperature and phase-transform volume of every element are calculated with the coupling calculation of phase-transform latent heat.

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Finite element modeling of laser bending of pre-loaded sheet metals

Journal of Materials Processing Technology (2003)

Yanjin Guan Sheng Sun Zhao Guoqun Luan Yiguo

10.1016/s0924-0136(03)00603-4

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THE PENALTY ELEMENT FINITE SIMULATION FOR POWER-LAW FLUIDS IN THREE-DIMENSIONAL EXTRUSION DIES

Gaofenzi cailiao kexue yu gongcheng (2006)

Luan Yiguo

Finite element method is applied in the simulation of polymer extrusion in this paper.Penalty finite element method is used to solve the incompressible constraint and the pressure term in momentum equation is eliminated.For numerical integration in elemental level,the term with the penalty parameter is calculated using the reduced integration method to avoid the lock' with very big penalty parameter.By adopting Streamline Upwind/Petrov-Galerkin(SUPG) formulation for the selection of the unsymmetrical weight function for energy equation,the distortion of the numerical results was overcome when the convective term is dominant.With taking into account of the heat transformed from mechanical energy,the viscosity dependence with temperature is analyzed by Arrhenius model.The example shows that the model and methods presented in this paper can give suitable distributions of velocity,pressure,viscosity and temperature for polymer flowing in three-dimensional extrusion dies.

Penalty Method

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Research on deformation behavior of isotactic polypropylene in uniaxial geogrid manufacture

Materials & Design (2015)

Chao Zheng Jie Liu Jianuan Fan Luan Yiguo Libin Song

Tacticity

Geogrid

Polypropylene

10.1016/j.matdes.2015.11.075

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