Nanoindentation Properties and Finite Element Analysis of the Rostrum of Cyrtotrachelus buqueti Guer (Coleoptera: Curculionidae)

2019 ◽  
Vol 25 (3) ◽  
pp. 786-797
Author(s):  
Longhai Li ◽  
Ce Guo ◽  
Shun Xu ◽  
Yaopeng Ma ◽  
Zhiwei Yu
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Information ◽  
Three Dimensional ◽  
Micro Computed Tomography ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Hybrid Transmission ◽  
Cyrtotrachelus Buqueti

AbstractThis work focuses on the application of nanoindentation measurements and the finite element method for analyzing the mechanical properties of the rostrum of the outstanding driller Cyrtotrachelus buqueti Guer. Nanoindentation tests were carried out to measure the Young's modulus and hardness of the rostrum, with the results for the “dry” samples being 13.886 ± 0.75 and 0.368 ± 0.0445 GPa, respectively. The values for the “fresh” samples showed no clear difference from those of the “dry” ones. Moreover, field observation was conducted to determine the motion behaviors of the rostrum on the weevil. Micro-computed tomography technology was employed to obtain structural information about the rostrum, using 9 µm slices. A real three-dimensional model of the rostrum was created using the MIMICS application. Finally, the mechanical properties of the rostrum were determined by finite element analysis. It was concluded that the rostrum provides an ideal biological template for the design of biocomposite materials and lightweight tube-shaped structures. The properties determined in this study can potentially be applied in different fields, such as in the design of automotive hybrid transmission shafts, helicopter tail drive shafts, robotic arms, and other sandwich structures in aerospace engineering.

scholarly journals Testing hypotheses for the function of the carnivoran baculum using finite-element analysis

2018 ◽  
Vol 285 (1887) ◽  
pp. 20181473 ◽  
Author(s):  
Charlotte A. Brassey ◽  
James D. Gardiner ◽  
Andrew C. Kitchener
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Computational Simulation ◽  
Compressive Loading ◽  
Three Dimensional ◽  
Negative Relationship ◽  
Micro Computed Tomography ◽  
Element Analysis ◽  
Duration Of Copulation ◽  
Shape Complexity

The baculum (os penis) is a mineralized bone within the glans of the mammalian penis and is one of the most morphologically diverse structures in the mammal skeleton. Recent experimental work provides compelling evidence for sexual selection shaping the baculum, yet the functional mechanism by which this occurs remains unknown. Previous studies have tested biomechanical hypotheses for the role of the baculum based on simple metrics such as length and diameter, ignoring the wealth of additional shape complexity present. For the first time, to our knowledge, we apply a computational simulation approach (finite-element analysis; FEA) to quantify the three-dimensional biomechanical performance of carnivoran bacula (n= 74) based upon high-resolution micro-computed tomography scans. We find a marginally significant positive correlation between sexual size dimorphism and baculum stress under compressive loading, counter to the ‘vaginal friction’ hypothesis of bacula becoming more robust to overcome resistance during initial intromission. However, a highly significant negative relationship exists between intromission duration and baculum stress under dorsoventral bending. Furthermore, additional FEA simulations confirm that the presence of a ventral groove would reduce deformation of the urethra. We take this as evidence in support of the ‘prolonged intromission’ hypothesis, suggesting the carnivoran baculum has evolved in response to pressures on the duration of copulation and protection of the urethra.

scholarly journals Development and Verification of Three-Dimensional Model of Femoral Bone: Finite Element Analysis

2019 ◽  
Vol 1372 ◽  
pp. 012014 ◽  
Author(s):  
Aishah Umairah Abd Aziz ◽  
Hong Seng Gan ◽  
Ahmad Kafrawi Nasution ◽  
Mohammed Rafiq Abdul Kadir ◽  
Muhammad Hanif Ramlee
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Femoral Bone ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis

Ladle Transportation Car Frame Finite Element Analysis

2012 ◽  
Vol 591-593 ◽  
pp. 841-844
Author(s):  
Ping Tang ◽  
Chun Hua Pan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Design ◽  
Mechanical Design ◽  
Three Dimensional ◽  
Electrical Measurement ◽  
Stress And Strain ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
The Finite Element Analysis

Using the mechanical design of the software Solid works to established the 280 t LF the ladle furnace transportation car frame three dimensional model, and by using the finite element analysis of software Cosmos/works to static analysis for the frames, revealing that the frame of structure stress and strain distribution map of the frame, and also reveals that dangerous points and dangerous sections. Using resistance strain gauge to measure 280 t ladle transportation car frame, it is concluded that the frame of stress and strain distributions. Through the electrical measurement test the results were compared with finite element analysis results, further proof that the finite element analysis of the accuracy of the results provides theory basis for the optimization design of the frames.

Torsional Strength Analysis of Output Shaft in Portal Axle Using Finite Element Analysis

2013 ◽  
Vol 284-287 ◽  
pp. 996-1000 ◽  
Author(s):  
Jong Boon Ooi ◽  
Xin Wang ◽  
Ying Pio Lim ◽  
Ching Seong Tan ◽  
Jee Hou Ho ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Experimental Results ◽  
Strength Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Torsional Strength ◽  
Overall Performance

Portal axle unit is a gearbox unit installed on every end axles of the vehicle. It is installed to the vehicle to give higher ground clearance to enable vehicle to go over large obstacle when driving in off-road conditions. Shafts must be exceptionally tough and lightweight to improve the overall performance of the portal axle unit. In this paper, the shaft is analyzed in three-dimensional model and the stress of the shaft model is analyzed using finite element analysis (FEA). The FEA result is compared with experimental results.

scholarly journals Development of a 3D WebGIS Application for the Visualization of Seismic Risk on Infrastructural Work

2021 ◽  
Author(s):  
Mauro Mazzei ◽  
Davide Quaroni
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Seismic Risk ◽  
Three Dimensional ◽  
Seismic Action ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Technical Standards ◽  
Element Analysis ◽  
Italian Territory

In this paper we describe the potentialities of a tool for the visualization of experimental results directly on a three-dimensional model. The case study concerns the visualization of the results of a dynamic finite element analysis (FEA/FEM) applied to the calculation of seismic risk on works belonging to the Italian infrastructural heritage, specifically bridges, viaducts and overpasses. The project is based on finite element analysis performed on an exemplary set of 8 structures located on the Italian territory, performed by means of the open-source software framework OpenSees, according to the guidelines indicated in the Technical Standards for Construction NTC08. The application created for this project is classifiable as a webGIS, since all data are georeferenced and visualized on a map through an application executed through a browser. The graphical interface displays the interested works on the map of the Italian territory and allows to select them by mouse click. Following the selection, a 3D rendering of the model of the work and the surrounding terrain is shown, in which the results of the analysis are represented using color gradients directly on the three-dimensional model. The necessary tools are present for the selection of the type of result and for the animation in real time of the response of the work to the seismic action. The 3D representation is freely navigable by the user thanks to intuitive tools of panning, rotation and zoom through mouse and keyboard. The application takes advantage of HTML5, CSS and Javascript to show graphical features such as Cartesian diagrams of accelerograms used in modal analysis.

scholarly journals A Finite Element Analysis to Compare Stress Distribution on Extra-Short Implants with Two Different Internal Connections

2019 ◽  
Vol 8 (8) ◽  
pp. 1103 ◽  
Author(s):  
García-Braz ◽  
Prados-Privado ◽  
Zanatta ◽  
Calvo-Guirado ◽  
Prados-Frutos ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Axial Load ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Stress Concentrations ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Short Implants

Background: The goal of this study was to analyze the stress distribution on two types of extra-short dental implants with 5 mm of length: An internal hexagon (IH) and morse taper connection (MT). Methods: The three-dimensional model was composed of trabecular and cortical bone, a crown, an extra-short dental implant and their components. An axial load of 150 N was applied and another inclined 30° with the same magnitude. Results: Stress concentrations on the IH implant are observed in the region of the first threads for the screw. However, in the MT implant the highest stress occurs at the edges of the upper implant platform. Conclusions: In view of the results obtained in this study the two types of prosthetic fittings present a good stress distribution. The Morse taper connections presented better behavior than the internal in both loading configurations.

Finite Element Analysis of Multi-Ropes Friction Hoister Main Shaft

2012 ◽  
Vol 538-541 ◽  
pp. 1935-1938 ◽  
Author(s):  
Ming Xia Yan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Structure Design ◽  
Main Shaft ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Operation Conditions ◽  
The Finite Element Analysis ◽  
Optimal Designing

Three-dimensional model of the main shaft of JKM4×4 hoister was built based on Pro/E. After having applied boundary conditions and loads to the model, the finite element analysis for the main shaft was conducted under extreme operation conditions with ANSYS, the stress and displacement distribution was presented and the stress biggest hazard points were found. Based on the analysis results, improvement methods for the main shaft structure design was given out, which provides references for further optimal designing the main shaft of hoister.

A New Method Based on Finite Element Analysis for Crankshaft Strength

2012 ◽  
Vol 241-244 ◽  
pp. 2125-2128 ◽  
Author(s):  
Zhao Hua Xu ◽  
Zhi Qin Cui ◽  
Xiao Hua Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Response ◽  
Optimization Design ◽  
Three Dimensional ◽  
New Method ◽  
Strength Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis

This paper presents a new method for the analysis of the crankshaft strength by using the softwares of solidworks, matlab and ansys. Using the powerful modeling function of solidworks, the three-dimensional model of crankshaft was established. Applying the techniques of numerical operation, graph display and GUI of matlab, the simulation calculations of kinematics, dynamics of crankshaft was carried out and the force and torque of crankshaft was obtained. Making full use of finite element analysis function of ansys, the modal analysis and strength analysis of crankshaft were made. The results show that it is valid to take the respective advantages of solidworks, matlab and ansys to establish a simple and effective approach for the analysis of the crankshaft strength, which supplies foundation for the optimization design and dynamic response of crankshaft.

Finite Element Analysis of 2450 Type Close-Top Mill Housing

2012 ◽  
Vol 601 ◽  
pp. 173-176
Author(s):  
Xi Wang ◽  
Chang Liang Xu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Stress Contour ◽  
Maximal Displacement

Aimed at the maximum stress and distortion, the three-dimensional model of 2450 type close-top mill housing was simulated by finite element analysis, with the help of FEM software (ANSYS). The positions of dangerous sections and the maximum stress was shown in stress contour. The displacement and maximal displacement of various points was obtained in the deformation contour. The results show that different structural parameters was used for the key parts, and the influence of parameters to stress and deformations can be obtained, which can provide reference for the design of the related mill housing.

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