Finite element analysis and design of rubber specimen for mechanical test

Abstract This study is the first attempt to explore the reason of costochondral graft fracture after lengthy mandible advancement and bilateral coronoidectomy by combining finite element analysis and mechanical test. Eleven groups of models were established to simulate costochondral graft reconstruction in different degrees of mandible advancement, ranging from 0 to 20 mm, in 2 mm increment. Force and stress distribution in the rib-cartilage area were analyzed by finite element analysis. Mechanical test was used to evaluate the resistance of the rib-cartilage complex. Results showed a sharp increase in horizontal force between 8 and 10 mm mandible advancement, from 26.7 to 196.7 N in the left side, and continue increased after 10 mm, which was beyond bone-cartilage junction resistance according to mechanical test. Therefore, we concluded that bilateral reconstruction with coronoidectomy for lengthy mandible advancement (≥ 10 mm) may lead to prominent increase in shear force and result in a costal-cartilage junction fracture, in this situation, alloplastic prosthesis could be a better choice. We also suggested that coronoidectomy should be carefully considered unless necessary.

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A Comparison of Barge Impact Loads Predicted by Design Specifications, High Resolution Finite Element Analysis, and Design-Oriented Dynamic Analysis

Structures 2004 ◽

10.1061/40700(2004)36 ◽

2004 ◽

Author(s):

Gary R. Consolazio ◽

Jessica L. Hendrix

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

High Resolution ◽

Dynamic Analysis ◽

Impact Loads ◽

Element Analysis ◽

Analysis And Design ◽

Design Specifications

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An Analysis Tool for the Installation of Submarine Cables in an S-Lay Configuration Including “In and Out of Water” Cable Segments

Journal of Marine Science and Engineering ◽

10.3390/jmse8010048 ◽

2020 ◽

Vol 8 (1) ◽

pp. 48 ◽

Cited By ~ 1

Author(s):

Vasileios A. Mamatsopoulos ◽

Constantine Michailides ◽

Efstathios E. Theotokoglou

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Design Criterion ◽

Limiting Factors ◽

Radius Of Curvature ◽

Analysis Tool ◽

Analysis Software ◽

Element Analysis ◽

Analysis And Design ◽

Custom Made

Today, the offshore oil and gas and wind power industry is a heavily regulated segment, and current standards have established restrictions which yield a very limited weather window for submarine cable installations due to experience with cable failure in bad weather. There are two main limiting factors in current practice during cable installation of an S-lay configuration: the design criterion for the minimum allowable radius of curvature in the touch down point and the avoidance of axial compression in the touch down zone. Accurate assessment of the cable integrity during offshore installation has drawn great attention and is related to the existing available analysis and design tools. The main purpose of this paper is to develop and propose a quick and easy custom-made analysis tool, which is able to export similar results as sophisticated finite element analysis software. The developed tool utilizes analytical equations of a catenary-type submarine structure extended to account for varying cross-sections with different weights and/or stiffnesses, as is the real practice. A comparative study is presented in this paper to evaluate the significance for the modeling of the “out of water” cable segment required for accurate safety factor quantification during a laying operation. The efficiency and accuracy of the proposed tool are proven through a validation study comparing the results and the computational effort and time with commercial finite element analysis software. The analysis error in the case of not modeling the “out of water” cable part is significant, especially in shallow water areas, which proves the importance of using the proposed analysis tool.

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