Nonlinear Finite Element Analysis of Pressurized Spherical Shell for Deep Water Structure

2007 ◽  
Author(s):  
Liangbi Li ◽  
Renhua Wang ◽  
Minghua Yu ◽  
Zili Wang
Keyword(s):  
Finite Element ◽  
Spherical Shell ◽  
Deep Water ◽  
Water Structure ◽  
Nonlinear Finite Element ◽  
Yield Strain ◽  
Element Analysis ◽  
The Stability ◽  
Material Nonlinear ◽  
Critical Buckling Pressure

One of the main problems in developing the deep water structure is the stability of the pressurized spherical shell. If the pressurized spherical shell belongs to moderate thick shell, the transverse shear deformation must be taken into account. Based on the nonlinear finite element method, the stability of the pressurized spherical shell under deep water was studied in this paper. The influence of out of roundness due to the machining, the interaction between material nonlinear and geometry nonlinear were considered. They are caused by material yield, strain intensifying and big plastic deformation of the whole shell structure buckling. Results from calculation showed that the critical buckling pressure decreases with the increasing of the radius under the same thickness but increases with the thickness under the same radius. The relationship charts of the critical buckling pressure, the thickness, the radius of the pressurized spherical shell were derived. The reasonable geometric parameters were then selected.

Nonlinear Finite Element Analysis on the Steel Frame with Semi-Rigid Connection under Periodic Load

2011 ◽  
Vol 255-260 ◽  
pp. 614-618
Author(s):  
Lai Wang ◽  
Bo Shun Liu ◽  
Ning Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nonlinear Finite Element Analysis ◽  
Steel Frame ◽  
Nonlinear Finite Element ◽  
Periodic Load ◽  
Element Analysis ◽  
Finite Element Software ◽  
Rigid Connection ◽  
Material Nonlinear

In this paper, nonlinear finite element analysis on the steel frame with top-seat angle and double web-angles semi-rigid connection were carried out with ANSYS finite element software. In the analysis, connective, geometrical and material nonlinear were considered. Compare analysis results with experimental results, the influence of semi-rigid connection’s flexibility on steel frame was studied and some references to the design of steel frame with semi-rigid connection were supplied.

Nonlinear Finite Element Analysis of the Stability of Gravity Platform

2014 ◽  
Vol 578-579 ◽  
pp. 292-295
Author(s):  
Xin Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nonlinear Effect ◽  
Oil Field ◽  
Nonlinear Finite Element ◽  
Interface Element ◽  
Contact Interface ◽  
Element Analysis ◽  
The Stability ◽  
Gravity Platform

Gravity platform was widely used in the development of marginal oil field, but the existence of scour pit caused by the flow and wave increasing the possibility to overturn. The paper introduced the no depth contact interface element to simulate the nonlinear effect between the bucket skirt and soil, and introduced the birth-death element to simulate the increasing scour pit. The results provide guidance to prevent overturning.

Nonlinear Finite Element Analysis on Shear Bearing Capacity of Masonry Wall Strengthened by SGFRP

2014 ◽  
Vol 578-579 ◽  
pp. 1400-1404
Author(s):  
Zhi Zhang ◽  
Qian Gu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Nonlinear Finite Element Analysis ◽  
Masonry Wall ◽  
Nonlinear Finite Element ◽  
Element Analysis ◽  
Ansys Simulation ◽  
Shear Bearing Capacity ◽  
Material Nonlinear

4 finite element models of ANSYS were constructed according to the masonry wall specimens of the experimental study. A material nonlinear finite element analysis by the finite element calculation software ANSYS on masonry walls strengthened by SGFRP under the horizontal cyclic loads combined with constant gravity loads was performed. The load-displacement curves of the models obtained from ANSYS simulation were described. The ultimate loads of the 3 models strengthened by SGFRP increased significantly, and the fiber length affect the bearing capacity and the deformation capacity of the wall. The results of the nonlinear finite element analysis of the models agree well to the experimental results. Some effective and reasonable reinforcement suggestions are proposed.

scholarly journals Inlay-Retained Dental Bridges—A Finite Element Analysis

2021 ◽  
Vol 11 (9) ◽  
pp. 3770
Author(s):  
Monica Tatarciuc ◽  
George Alexandru Maftei ◽  
Anca Vitalariu ◽  
Ionut Luchian ◽  
Ioana Martu ◽  
...  
Keyword(s):  
Finite Element ◽  
Young Patients ◽  
Maximum Pressure ◽  
Class Iii ◽  
Element Analysis ◽  
Dental Prostheses ◽  
Abutment Teeth ◽  
Fixed Dental Prostheses ◽  
Implant Therapy ◽  
The Stability

Inlay-retained dental bridges can be a viable minimally invasive alternative when patients reject the idea of implant therapy or conventional retained full-coverage fixed dental prostheses, which require more tooth preparation. Inlay-retained dental bridges are indicated in patients with good oral hygiene, low susceptibility to caries, and a minimum coronal tooth height of 5 mm. The present study aims to evaluate, through the finite element method (FEM), the stability of these types of dental bridges and the stresses on the supporting teeth, under the action of masticatory forces. The analysis revealed the distribution of the load on the bridge elements and on the retainers, highlighting the areas of maximum pressure. The results of our study demonstrate that the stress determined by the loading force cannot cause damage to the prosthetic device or to abutment teeth. Thus, it can be considered an optimal economical solution for treating class III Kennedy edentation in young patients or as a provisional pre-implant rehabilitation option. However, special attention must be paid to its design, especially in the connection area between the bridge elements, because the connectors and the retainers represent the weakest parts.

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