scholarly journals Contact Element Method with Two Relative Coordinates and Its Application to Prediction of Strip Profile of a Sendzimir Mill

2007 ◽  
Vol 47 (7) ◽  
pp. 996-1005 ◽  
Author(s):  
Hai-liang YU ◽  
Xiang-hua Liu ◽  
Gyoo-Taek Lee
Keyword(s):  
Contact Element ◽  
Strip Profile ◽  
Relative Coordinates ◽  
Sendzimir Mill ◽  
Contact Element Method ◽  
Element Method

scholarly journals Numerical Analysis of Roll Deflection for Sendzimir Mill

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
H. L. Yu ◽  
X. H. Liu ◽  
G. T. Lee ◽  
X. W. Li ◽  
H. D. Park
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Contact Length ◽  
The Finite Element Method ◽  
Relative Coordinates ◽  
New Type ◽  
Function Expression ◽  
Sendzimir Mill ◽  
Contact Element Method ◽  
Element Method

The present work introduces a new type of numerical analyzing method: the contact element method with two relative coordinates (CEM). The main characteristic of the procedure is elements meshing on the basis of the contact length between objects and that each element has two relative coordinates. The ordinary expression of this procedure is DX[CXY(i)]=DY[CYX(i)]. Through this method, the CEM function of the 20-high Sendzimir mill and the deflection function expression of every roll are obtained. A computational software SM4SM for the Sendzimir mill has been developed, by which the deflection condition of rolls S, O, I, and A can be obviously seen. The results obtained by CEM have also been compared to that by the finite element method.

Study and Application on Computational Methods for Ultimate Bearing Capacity of Single Pile

2008 ◽  
Vol 400-402 ◽  
pp. 329-334
Author(s):  
Ze Liang Yao ◽  
Zhen Jian ◽  
Guo Liang Bai
Keyword(s):  
Bearing Capacity ◽  
Computational Methods ◽  
Ultimate Bearing Capacity ◽  
Contact Element ◽  
Computational Formula ◽  
Single Pile ◽  
Foundation Design ◽  
Experiment Method ◽  
Contact Element Method ◽  
Element Method

It is difficult and important to accurately calculate single pile ultimate bearing capacity during pile foundation design. Typical computational methods on single pile ultimate bearing capacity are contrastively analyzed in this paper. Contact element method on single pile ultimate bearing capacity is relatively accurate and economical, but it isn’t used in practical projects until now because its computational process is complicated. 343 different single pile ultimate bearing capacities are calculated with the contact element method in order to study a simple computational formula based on the contact element method. All data calculated are analyzed with a linear recursive multi-analysis program which is programmed with Fortran90. A simple computational formula on the contact element method is presented based on the analysis results. The simple computational formula, the experiential formula in the code, the contact element method and the static load experiment method are respectively used to calculate single pile ultimate bearing capacity in two practical projects in order to test the simple computational formula. The results show that the simple computational formula is relatively accurate. Some advice is presented based on the analysis results.

Computer simulation of landslides by the contact element method

2006 ◽  
Vol 32 (4) ◽  
pp. 434-441 ◽  
Author(s):  
Jiang Xiaoyu ◽  
Qiao Jianping ◽  
Wang Chenghua ◽  
Zhao Yu
Keyword(s):  
Computer Simulation ◽  
Contact Element ◽  
Contact Element Method ◽  
Element Method

scholarly journals USING THE NEW FIBRE CONTACT ELEMENT METHOD FOR DYNAMIC STRUCTURAL ANALYSIS

2015 ◽  
Vol 7 (1) ◽  
pp. 24-38
Author(s):  
João M. C. Estêvão ◽  
Ana S. Carreira
Keyword(s):  
Structural Analysis ◽  
Dynamic Response ◽  
Nonlinear Problems ◽  
Contact Element ◽  
Elastic Response ◽  
Reinforced Concrete Frame ◽  
Structural Dynamic ◽  
Concrete Frame ◽  
Contact Element Method ◽  
Element Method

In literature, there are many methods proposed for structural analysis based on discrete element formulations, mainly for nonlinear problems. One of these new methods is the Fibre Contact Element Method (FCEM). Many of these methods have been used for structural dynamic analysis problems. However, there are some questions about their precision in capturing the dynamic elastic response of structures when comparing to methods based on continuous models, like the well known Finite Element Method (FEM). For this reason, the results obtained with FCEM were extensively compared with FEM results and with laboratorial tests, to better understand the performance of this new method in capturing the elastic dynamic response of structures. Results indicate that this kind of discrete methods are able to determine the vibration modes of a structure with equal or better precision level than the obtained with FEM. FCEM was also used to capture the dynamic response of a reinforced concrete frame with infill walls, as a way to show the method capabilities in reproducing the dynamic behaviour of structures that have an almost continuous mass distribution.

Determination on Interlayer Separation Threshold of Complex Roof with Mechanics Properties

2013 ◽  
Vol 303-306 ◽  
pp. 2908-2913
Author(s):  
De Yi Wu ◽  
Liu Yang Nie
Keyword(s):  
Normal Stress ◽  
Contact Element ◽  
Contact Theory ◽  
Tension Stress ◽  
Deep Mining ◽  
Separation Threshold ◽  
Nonlinear Contact ◽  
Contact Element Method ◽  
Element Method

In order to determine interlayer separation threshold and separation stability of complex roof, distribution of interlayer separation was analyzed in different conditions by a contact element method based on nonlinear contact theory in ANSYS program. The conclusion was drawn that normal stress was tension stress in the center of construction surface in deep mining and it could be considered as interlayer separation threshold of complex roof.

A New Model for the Prediction of Roll Deformation in a 20-High Sendzimir Mill

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
J. H. Cho ◽  
S. M. Hwang
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
New Model ◽  
Roll Profile ◽  
Strip Shape ◽  
Element Simulation ◽  
Strip Profile ◽  
Flat Rolling ◽  
Sendzimir Mill ◽  
Roll Deformation

A sound model for the prediction of the deformed roll profile during flat rolling is vital for the precision control of the strip profile and strip shape. However, preliminary investigations reveal that the applicability of existing models may be limited due to their inherent predictions errors. In this paper, a new model is proposed which is capable of precisely predicting the deformed roll profile in a multihigh mill. The model, which is developed on the basis of the predictions from finite element simulation, is applied to the analysis of roll deformation in a 20-high Sendzimir mill under some special conditions, such as rigid outer rolls and no roll shifting, etc. The prediction accuracy of the new model is demonstrated through comparison with the predictions from the finite element simulation.

scholarly journals Edge-Drop Control Behavior for Silicon Strip Cold Rolling with a Sendzimir Mill

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 783 ◽  
Author(s):  
Hongbo Li ◽  
Zhenwei Zhao ◽  
Dawei Dong ◽  
Guomin Han ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Cold Rolling ◽  
Process Parameters ◽  
Work Roll ◽  
Rolling Process ◽  
Transverse Flow ◽  
Control Behavior ◽  
Strip Profile ◽  
Sendzimir Mill ◽  
Edge Drop

Edge-drop control is important for silicon strip cold rolling, as the silicon strip is mainly used as a laminated core. Moreover, cold rolling is the key process for the thin strip edge-drop control, and a Sendzimir mill is one of the most popular cold rolling mills for silicon strips. Thus, the mastery of edge-drop control behavior for silicon strip cold rolling with a Sendzimir mill is beneficial for the improvement of the strip profile quality. With the finite element method, two models are built to analyze the edge-drop control behavior, one is the roll system and strip integrated elastic-plastic deformation statics model, and the other is the strip plastic deformation dynamics model. The first model provides the roll gap contour for the second model, then the strip profile can be calculated in the second model, which considers the transverse flow of the metal. Firstly, the compositions of edge-drop for the silicon strip are analyzed systematically, which are the edge-drop for work roll bending, the edge-drop for work roll flattening, and the edge-drop for transverse flow of the metal. Secondly, the influence of different rolling process parameters on the three parts are analyzed, such as the entrance thickness, the rolling reduction, the rolling tension, and so on; further, the influence of the roll contours are also analyzed. Finally, the edge-drop control behavior of the different rolling process parameters and roll contours are obtained. The research results provide theoretical guidance for edge drop control in the Sendzimir mill.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

Sign in / Sign up

Export Citation Format

Share Document