Undrained Finite Element Analysis of Soil for Collapse Load with the Effective Stress Method

2009 ◽  
Author(s):  
E.X. Song ◽  
A. Verruijt
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Effective Stress ◽  
Collapse Load ◽  
Element Analysis ◽  
Effective Stress Method

Influence of exsolved gases on slope performance at the Sarnia approach cut to the St. Clair Tunnel

2010 ◽  
Vol 47 (9) ◽  
pp. 971-984 ◽  
Author(s):  
J. Paul Dittrich ◽  
R. Kerry Rowe ◽  
Dennis E. Becker ◽  
K. Y. Lo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Effective Stress ◽  
New Work ◽  
Element Analysis ◽  
Natural Gases ◽  
Fine Grained ◽  
Consolidation Theory ◽  
Naturally Occurring ◽  
South Slope

In 1993, over 100 years after the completion of the original St. Clair Tunnel and its approach cuts, work commenced on the new St. Clair Tunnel. The new tunnel used the existing approaches, but required additional excavation to widen and deepen the original cuts. In Sarnia, the new work initiated unusual deep-seated deformations on the south slope of the approach. Effective stress finite element analysis (FEA), using an elliptical cap soil model coupled with Biot consolidation theory, was used to model the 1993 construction, but initial predictions were unable to capture the trend of deformations noted in the field. Naturally occurring gases are frequently encountered near the base of the overburden in the Sarnia area and this phenomenon was observed during drilling investigations in the Sarnia approach cut. Including the effects of the presence of exsolved natural gases in fine-grained soils subjected to unloading in the FEA results in substantially better predictions in the trend of deformations on the slopes of the approach cut.

STUDY OF HOLLOW STEMMED HIP BONE FORMING

2017 ◽  
Vol 41 (4) ◽  
pp. 531-542 ◽  
Author(s):  
Dyi-Cheng Chen ◽  
Jheng-Guang Lin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Titanium Alloys ◽  
Effective Stress ◽  
Experimental Results ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Friction Factors ◽  
Punch Load

This study investigated hollow stemmed hip forging for enhancing the biocompatibility of Ti-6AL-4V titanium alloys. Instead of using the expensive titanium billet, this study applied DEFORMTM 3D finite element analysis software to simulate and analyze stem forming with respect to different die temperatures, friction factors, punch types, forging velocities, and billet temperatures. On the basis of its shape, a punch can be classified as flat head, ladder shaped, spherical, and conical. These differences affect the effective stress and punch load after stem formation. The experiment parameters were determined using the Taguchi L16 (45) orthogonal table. Both the simulated and experimental results indicated that the error for the size of the bone stem was less than 2%.

Effective-stress finite element analysis of spudcan penetration with lattice leg in clay

2013 ◽  
Author(s):  
Yu Ping Li ◽  
Fook Hou Lee ◽  
Jiang Tao Yi ◽  
Xi Ying Zhang ◽  
Siang Huat Goh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Effective Stress ◽  
Element Analysis

A Study on Effect of Shape Irregularities on Collapse Loads of Pipe Bends with Critical Circumferential Throughwall Crack under In-Plane Closing Bending

2014 ◽  
Vol 592-594 ◽  
pp. 980-984
Author(s):  
Sumesh Sasidharan ◽  
Arunachalam R. Veerappan ◽  
Subramaniam Shanmugam
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Detrimental Effect ◽  
Bending Moment ◽  
Collapse Load ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Circumferential Crack ◽  
Plane Bending

The presence of thorough wall circumferential cracks has a detrimental effect on collapse load of elbows. The existing theoretical solutions do not correctly quantify the weakening effect due to the presence of the circumferential through wall crack in shape imperfect pipe bends. The present study has been done to investigate the effect of ovality and thinning on the collapse moment of 90° elbow with critical throughwall circumferential crack under in-plane bending moment using elastic-plastic finite element analysis considering large geometry change.

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