Comparison of Stresses Generated within the Supporting Structures of Mandibular Second Molars Restored with Different Crown Materials: 3-D Finite Element Analysis (FEA)

2014 ◽  
Vol 24 (6) ◽  
pp. 484-493 ◽  
Author(s):  
Dalia A. Abuelenain ◽  
Reem Ajaj ◽  
Eman I. M. Fath El-Bab ◽  
Mohammad M. I. Hammouda
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Supporting Structures

Comparative Safety Analysis of Different Bollard Supporting Structures

2013 ◽  
Vol 325-326 ◽  
pp. 1297-1300
Author(s):  
Long Zhang ◽  
Jian Xing Yu ◽  
Wei Lin Ma ◽  
Bao Jian Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Analysis ◽  
Ansys Software ◽  
Element Analysis ◽  
Strength Criteria ◽  
Design Load ◽  
Comparative Safety ◽  
Supporting Structures

Detailed finite element analysis has been carried out for different bollard supporting structures by ANSYS software. From the analysis results, it can be seen that the bollard supporting structures are of adequate strength to take the design load transferred from the mooring rope during operation considering the requirement on strength criteria from IACS, and strength check is performed in accordance with the updated relevant ABS standard. Finally, a comparison of these different bollard supporting structures is made to find out their own advantages from safety and other aspects.

Applications of Multi-Point Mirror Supporting

2013 ◽  
Vol 475-476 ◽  
pp. 1555-1558
Author(s):  
Ren Shan Zhuo ◽  
Dong Ge Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Theoretical Studies ◽  
Design Requirement ◽  
Element Analysis ◽  
Primary Mirror ◽  
Supporting System ◽  
System A ◽  
Series Of Experiments ◽  
Supporting Structures

Primary mirror (PM) supporting system design is one of the key components to the design of a telescope. This paper presents applications of extended multi-point supporting structures that are employed in ground based theodolites, 3 points positioning-9 points supporting system and 18 points supporting system. A number of theoretical studies have been performed using Finite Element Analysis (FEA) on each supporting system, in which the extended multi-point supporting system to 0.6-m and 1-m diameter primary mirror is particularly focused. Analyzing Zerodur major mirrors with a diameter to thickness ratio less than 7.3, deformation due to supporting gives an RMS value less than 6-nm which is 24% of the design requirement of 60-nm. Series of experiments have also been conducted using 4-D interferometer. The deformation due to supporting of major mirror has been predominantly suppressed mainly by deformation during the fabrication process. This indicates that the above supporting systems perform an excellent task under given conditions.

scholarly journals Finite Element Analysis (FEA) of Palatal Coverage on Implant Retained Maxillary Overdentures

2020 ◽  
Vol 10 (19) ◽  
pp. 6635
Author(s):  
Monica A. Fernandez ◽  
N. Subramanian ◽  
M. Nawrocki ◽  
A. Nawrocki ◽  
J. Craighead ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Axial Loading ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Maxillary Bone ◽  
Bone Stress ◽  
Significant Difference ◽  
Von Mises ◽  
Supporting Structures

Purpose: The aim of this study was to determine stress levels on supporting structures of implant-retained overdentures as a function of varying degrees of palatal coverage using finite element analysis modeling at different loading angles. Materials and Methods: ABAQUS®-software was used to perform finite element analysis on eight overdenture models with three and four implants and with and without palatal coverage designs. Loads were applied perpendicular and 45º to the implants. Von Mises stress was measured to determine bone stress. A one-way ANOVA determined which model caused the most stress to the maxillary bone. Results: Palatal coverage increased stress to anterior implant in three implant (p = 0.08) models but decreased stress to all implants in four implant models (p = 0.43). Distal implants received more stress than anterior implants for all models. There was no significant difference between a full palate and no palate coverage overdenture prosthesis when a bar was added under axial loading (p = 0.954). Under non-axial loading, a decrease in stress was noted with the bar in all areas except the anterior implant site. Conclusions: Palatal coverage may not be necessary when applying a pure axial load. The addition of a bar decreased stress at loading.

scholarly journals Biomechanics in Removable Partial Dentures: A Literature Review of FEA-Based Studies

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Mohammed A. Mousa ◽  
Johari Yap Abdullah ◽  
Nafij B. Jamayet ◽  
Mohamed I. El-Anwar ◽  
Kiran Kumar Ganji ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Literature Review ◽  
Literature Survey ◽  
Dynamic Loads ◽  
Element Analysis ◽  
Biomechanical Stress ◽  
Flexible Materials ◽  
Horizontal Curvature ◽  
Supporting Structures

The present study was aimed at reviewing the studies that used finite element analysis (FEA) to estimate the biomechanical stress arising in removable partial dentures (RPDs) and how to optimize it. A literature survey was conducted for the English full-text articles, which used only FEA to estimate the stress developed in RPDs from Jan 2000 to May 2021. In RPDs, the retaining and supporting structures are subjected to dynamic loads during insertion and removal of the prosthesis as well as during function. The majority of stresses in free-end saddle (FES) RPDs are concentrated in the shoulder of the clasp, the horizontal curvature of the gingival approaching clasp, and the part of the major connector next to terminal abutments. Clasps fabricated from flexible materials were beneficial to eliminate the stress in the abutment, while rigid materials were preferred for major connectors to eliminate the displacement of the prosthesis. In implant-assisted RPD, the implant receive the majority of the load, thereby reducing the stress on the abutment and reducing the displacement of the prosthesis. The amount of stress in the implant decreases with zero or minimal angulation, using long and wide implants, and when the implants are placed in the first molar area.

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