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Explicit Dynamic FEM Analysis of Multipass Vertical-Horizontal Rolling

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Journal of Iron and Steel Research International 2006年第3期13卷 26-30页

作者： YU Hai-liang LIU Xiang-hua ZHAO Xian-ming WU Di Y. Kusaba State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China Sumitomo Metal Industries Ltd Fuso-Cho 660 Amagasaki Japan

Three passes of plate rolling during vertical-horizontal rolling process are simulated with explicit dynamic finite element method and updating geometric method. The equivalent strain and stress fields, and shape change at the head and tail of slab during rolling are obtained. The calculated result of the shape at the head and tail of slab is in good agreement with the measured one. The explicit dynamic finite element method and updating geometric method can be used effectively to analyze the multipass vertical-horizontal （V-H） rolling process.

关键词： V-H rolling multipass equivalent stress strain slab shape

Effect of Fe Particle on the Surface Peeling in Cu-Fe-P Lead Frame

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Journal of Wuhan University of Technology(Materials Science) 2006年第3期21卷 18-20页

作者：苏娟华 College of Materials Science and Engineering Henan University of Science and Technology Luoyang 471003ChinaCollege of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072China

Under the surface peeling of Cu- Fe- P lead frame alloy larger Fe particles were observed by energy dispersive spectroscopy. By using the large strain two-dinension plane strain model and elastic plastic finite element method, the cause for peeling damage of Cu-Fe-P lead frame aUoy was investigated. The results show that when the content of Fe particles is more than 30% at local Fe-rich area the intense stress coacentration in the Fe particle would make the Fe particle broken up. The high equivalent stress mutation and the mismatch of equivalent strain 10% at the two sides of intefrace make it easy to develop the crack and peeling damage on finish rolling. The larger Fe particles in the Cu-Fe-P alloy should be avoided.

关键词： Cu-Fe-P lead frame surface peeling equivalent stress equivalent strain

The fluidesolid coupling analysis of screw conveyor in drilling fluid centrifuge based on ANSYS

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Petroleum 2015年第3期1卷 251-256页

作者： Hongbin Liu Pingying Li Huina Xiao Weitao Mu School of Mechatronic Engineering Southwest Petroleum UniversityChengdu 610500China

In the centrifugal separations of drilling fluid,screw conveyor is a critical component to push and separate the *** work performance and structural parameters of conveyor are immediately related to the production capability,the working life and the separating effect of the *** existing researches always use the theoretical calculation of the approximate loads to analyze the strength of conveyor,and it cannot reflect the stress situations *** order to ensure the precise mastery of the working performance,this article obtained pressure distribution under working conditions from CFX evaluation and gained equivalent stress and deformation under several load conditions by using the ANSYS Workbench platform to check the strength of *** results showed that the influence of centrifugal hydraulic pressure was less than that of centrifugal force on the strength and deformation of ***,the maximum equivalent stress occurred at the inside of the feed opening,while the maximum deformation occurred at the conveyor blade edge of taper ***,whether considered the feed opening or not,the computing model had a great influence on the analysis results,and the simplified loads had a great influence on the deformation analysis *** methods and results from this article can provide reference for the design and the improvement of screw conveyor.

关键词： Drilling fluid centrifuge Screw conveyor Fluidesolid coupling equivalent stress

Vacuum Window of Intermediate Energy Heavy-Ion Microbeam Irradiation Facility

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Chinese Physics C 2008年第Z1期32卷 74-76页

作者：盛丽娜宋明涛刘杰中国科学院研究生院北京100086 中国科学院近代物理研究所兰州730000

The beam must be extracted into the air through the vacuum window to irradiate the living *** the window design,the material and thickness must be chosen to compromise the beam spot size broadening and the window *** structure-static analysis on the window of different structures and materials is done with the finite element analysis method,and the deformation and the equivalent stress are *** safety of these candidates is investigated using the intensity *** addition,the small angle scattering and the transverse range of ions are simulated using SRIM code,including all the effects on the beam spot size broadening,such as the incident ion energy, the material and the thickness of the window and the air *** last,the appropriate vacuum windows are presented,including the structure,material and thickness.

关键词： microbeam vacuum window equivalent stress beam spot broadening

非比例加载下电镀铜箔的晶粒长大行为(英文)

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材料与冶金学报 2010年第3期9卷 222-228页

作者：小野勇一李成日野大辅日本鸟取大学 Department of Mechanical and Aerospace Engineering Tottori University

Grain growth behavior in a copper foil under nonproportional loading was investigated. The grain growth density decreased with increasing phase shift between normal stress and shear stress. Moreover, under this condition, grains tended to grow in various directions. However, the relative frequency of the grain growth direction was slightly large in the maximum shear stress direction. Therefore, grain growth density is mainly dominated by the equivalent shear stress in Tresca theory in the case of nonproportional loading as well as proportional loading.

关键词： multiaxial fatigue combined stress out-of-phase loading equivalent stress