scholarly journals Evaluation of p-y Curves for Group Piles in Cohesive Soil Based on 3D Numerical Analysis

2021 ◽  
Vol 21 (6) ◽  
pp. 193-200
Author(s):  
Jaewoo Jung ◽  
Yongjin Choi ◽  
Jaehun Ahn
Keyword(s):  
Cohesive Soil ◽  
Single Pile ◽  
Analysis Program ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
The Individual ◽  
Group Piles ◽  
High Winds ◽  
Group Pile ◽  
Plaxis 3D

The pile foundation supported on a structure can generate large horizontal loads due to earthquakes, high winds, and wave actions. The behavior of piles when subjected to horizontal load is generally analyzed using the p-y curve and “p-multiplier (Pm),” which is the coefficient of the group pile effect. In this study, the p-y curves and Pm were calculated by analyzing a single pile and group of piles arranged in 3 × 3 installed in cohesive soil using the finite element analysis program, Plaxis 3D. The soil resistance (p) increased as the undrained shear strength of the clay increased and the distance between the pile centers (S/D) increased. In the case of the group pile effect, when Pm was closer to the center of the group pile, the distance between the pile centers was smaller, and Pm was less due to the interference effect of the adjacent individual piles. In conclusion, it was observed that Pm is affected by the location of the individual piles and the distance between the pile centers.

Collision Response of Bridge Girder with Shearkeys Subjected to Seismic Loads

2011 ◽  
Vol 90-93 ◽  
pp. 1539-1542
Author(s):  
Bo Wang ◽  
Yu Xiang Liu
Keyword(s):  
Seismic Loads ◽  
Analysis Program ◽  
Collision System ◽  
Element Analysis ◽  
Motion Feature ◽  
Rubber Bearing ◽  
Collision Response ◽  
The Finite Element Analysis ◽  
Calculation Results ◽  
Bridge Girder

In return for the collision response of bridge girder with shearkey subjected to seismic loads, a simplified dynamic model has been built by using the finite element analysis program Ansys/Ls-dyna. Based on the analysis of calculation results, the motion feature of this model is unfolded. Also, the stress response and characteristic at the bottom of shearkeys are analyzed, which are the most important parameters reflecting the cracking of shearkeys. Furthermore, the deformation of rubber bearing is elaborated to illustrate the collision of bridge girder with shearkeys. Finally, other key properties about the bridge girder of this collision system are addressed.

Development and Application of the Finite Element Analysis Program of the Stress-Based Forming Limit Criterion for Sheet Metal Forming

2007 ◽  
Vol 561-565 ◽  
pp. 1995-1998
Author(s):  
Ming He Chen ◽  
J.H. Li ◽  
Lin Gao ◽  
Dun Wen Zuo ◽  
Min Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Forming Limit ◽  
Analysis Program ◽  
Element Analysis ◽  
The Finite Element Analysis

In order to solve the problem existed in the numerical simulation of sheet metal forming for its use the strain-based forming limit diagram as criterion, which has the flaw of dependence on the strain paths, this paper develops the finite element analysis program based on the stress forming limit criterion applicable to the blank plastic forming technique, which follows the stress-strain transformation relationship when the sheet metal is undergoing plastic deformation, chooses Hill’s quadratic normal anisotropic criterion as computational model and selects the commercial finite element code Dynaform as its development environment. Also it be analyzed the finite element numerical simulation results of two deep drawing parts by the developed program module and realizes the prediction of sheet metal forming limit adopting the FLSD as criterion. The stress-based forming limit criterion for the developed program provides a new means to analyze the forming limit for the multistage sheet metal forming.

Driving Characteristics of a Simple Square-Frame Ultrasonic Motor

2011 ◽  
Vol 110-116 ◽  
pp. 210-216
Author(s):  
J.W. Kim ◽  
C.H. Park ◽  
S.S. Jeong ◽  
M.H. Kim ◽  
T.G. Park ◽  
...  
Keyword(s):  
Elastic Body ◽  
Ultrasonic Motor ◽  
Resonance Mode ◽  
Optimal Size ◽  
Analysis Program ◽  
Bending Vibrations ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
The Right ◽  
Novel Design

A novel design of a simple square-frame USM (ultrasonic motor) was proposed. The stator of the motor consists of a square-frame shape elastic body and four rectangular plate ceramics. The four ceramics were attached to outer surfaces of the square-frame elastic body. The same phase voltages were applied to the ceramics on horizontal surfaces, and 90 degree phase difference voltages were applied to the ceramics on vertical surfaces. When the four outer edges of stator were clamped, the bending vibrations of the right angled bars were transformed into travelling vibrations and elliptical displacements were generated at the center of the bars. To find an optimal size of a stator, that generates elliptical displacement at the centers of the inner surfaces, the finite element analysis program ATILA was used. The analyzed results were compared to the experimental results. As result, the model EL10W3T0.5_CL7 which generates the maximum elliptical displacement was chosen by analyzing the resonance mode according to changes in frequency.

Study on Composite Model for Vibro-Replacement Stone Column Foundation by Finite Element Method

2011 ◽  
Vol 117-119 ◽  
pp. 43-47
Author(s):  
Shao Jun Fu ◽  
Chuan Cheng Zhu ◽  
Zhen Ke Huang
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Reliability And Validity ◽  
Composite Model ◽  
Stone Column ◽  
Analysis Program ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Column Foundation

On the base of studying on mechanism of the deformation and bearing capacity of vibro-replacement stone column foundation thoroughly, the assumptive conditions are presented. The composite 2-dimension numerical model of the stone column is established, this model considers the couple of stress-strain with Biot consolidation and the reinforced efficiently, the finite element analysis program is developed according to this model. The reliability and validity of APOSE is verified by a simple example. The results show that APOSE can be applied to analyze the consolidation and subsiding for vibro-replacement stone column, etc

Evaluation of Pipeline Stresses During Line Lowering

2008 ◽  
Author(s):  
Millan Sen ◽  
Joe Zhou
Keyword(s):  
Finite Element Analysis ◽  
Loading Condition ◽  
Analysis Program ◽  
Element Analysis ◽  
Environmental Loads ◽  
Right Of Way ◽  
The Finite Element Analysis ◽  
The Right ◽  
Maximum Stresses

The stresses induced to a pipe during line lowering are the maximum stresses that the pipeline will experience during its lifetime, in regions where there are no excessive environmental loads. During the installation of the TransCanada pipeline at Stittsville, Ontario, it was critical to limit the pipeline stresses that occurred during line lowering. This was required in order to fulfill the requirements of ECA-based flaw acceptance criteria applicable to mainline welding. However, the construction of the pipeline involved numerous challenges with regards to moving equipment during the pipeline installation, regions of deep cover requirements, and spatial restrictions on the right of way. These conditions introduced complicated loading scenarios, which made it difficult to ascertain the resulting stresses that the line lowering would apply to the pipeline. These stresses were evaluated herein using the finite element analysis program PIPLIN, with consideration of the actual in-situ installation conditions. Each loading condition was modeled individually, and the forces in the sidebooms were considered in addition to the pipeline stresses. It was determined that all the stresses in the pipeline during the line lowering were acceptable, so long as the specified boom locations remained within limits.

scholarly journals Study of Parameters Affecting Temperature of Journal Bearing and Shaft in Sugar Mill

2021 ◽  
Vol 302 ◽  
pp. 01011
Author(s):  
Kumpanat Sirivedin ◽  
Keittipong Choojit
Keyword(s):  
Environmental Management ◽  
Finite Element Analysis ◽  
High Temperature ◽  
Journal Bearing ◽  
Maximum Temperature ◽  
Sugar Mill ◽  
Analysis Program ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Save Energy

In the sugar mill machine, equipment is operated under high temperature. This high temperature will affect to the roller shaft and journal bearing. Additionally, the equipment damages could be caused by the various factors that affected directly to roller shaft and journal bearing. In this research, the operations of equipments were modelled using the finite element analysis program (FEA), to determine the maximum temperature of the roller shaft and journal bearing after a specified period of time. An experiment with the physical roller shaft and journal bearing was carried out to obtain the actual temperature readings. Verification of the simulated results was performed by comparing the simulated values with the actual values obtained in the experiment. According to this research, the monitored parameters affected temperature and damages of the shaft and bearings during pressing oil from the hydraulic top cap. Finally, this research applied the FEA in conjunction with engineering and environmental management in sugar factory to reduces machine damange and to save energy during sugar mill operation.

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