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The thesis deals with all possible factors that influence high-pressure gravel packing from the angle of rock features of loose sandstone and construction technology. And then numerically simulate given naked eye wells and perforated wells by means of finite element analysis software. The simulations suggest that perforation along the direction of maximum principal stress helps occurrence of the cracks...
A prototype model of Ring-plate Planetary Indexing Cam Mechanism (RPICM) is developed with the commercial software of Solidworks 2010. The dynamics simulation using Solidworks 2010's Motion module is carried out, and the contact force of the cam and the pin gear is received. A 2D finite element model of the RPICM is established with Matlab and ANSYS software. This paper is aimed at the strain analysis...
Underground Culvert construction always adjacent to existing pile foundation, it is an important problem how to ensure the security of the existing pile. Taking the Underground Culvert at West Ring Road of the South-North Water Transfer Project as an example, the 3D numerical simulation had been carried out and the stress deformation Law and the stability of the pile was studied. The results had shown...
In order to analyze stress of the part in service, a flow for stress analysis of the part in service is proposed based on industrial computed tomography(CT). Firstly, the part in service was scanned to get CT image which was processed to extract the edge by Canny method. Then the edge was transformed into vector graph. Finally, the vector graph was analyzed by finite element method based on simulating...
The mechanical fit between the connecting rod's small head and the bush is a typical interference fit. The thick cylinder model is applied to calculate the theoretical stress on the surface of the small head for this fit. By the contact finite element method, the simulation model is used to get the stress and deformation by constructing the true interference of fit bodies. The stress on the connecting...
Osteoporotic patients occur frequently fragile fractures, and femoral fractures are the common traumatic injuries in the elderly. Although wires are often used through trials-and-errors for unstable femoral proximal fractures with DHS fixation clinically, there is no efficacy wire fixation technique available due to the lack of biomechanical study. FEM is applied to analyze the stress and strain distribution...
The research of load distribution is not only an important part of bearing theory but the basis of studying the other performance indicators of bearings as well. Based on the contact theory of Hertz, the relation of geometric deformation of slewing bearing under certain loads is analyzed, and an analytical formula of load distribution for the slewing bearing under the action of radial force, axial...
The input gears from the first stage of a combine harvester gearbox have been subjected to experimental testing. A three-dimensional finite element model was established by using Solid Works and the effect of an external load distribution along the gear tooth width was added according to actual working situations. In the Solid Works/Simulation module, the contact relation was established based on...
In order to design a quartz accelerometer with high-precision vibration characteristics and strong resistance to external shock, a novel double-ended tuning fork quartz accelerometer that combines the well-known principles of the tuning fork techniques is developed. The mechanical structure of the double-ended tuning fork quartz accelerometer comprises of a pair of double-ended tuning forks, one damping...
This paper reports a method for analyzing local stress in resonating single-crystal silicon (SCS) microstructures of various crystal orientations using micro Raman spectroscopy. The notched support beams of fan-shaped in-plane resonators were used as specimens. The specimens have five different crystallographic orientations. The spectra at notch tips were calculated using the Raman spectrum of Si...
SiC is a candidate material for microelectromechanical and nanoelectromechanical systems, but the high residual stress created during the film grow limits the development of the material for these applications. To understand the stress relaxation mechanism in hetero-epitaxial 3C-SiC films, different micromachined free-standing structures have been realized. In this paper, assisted by finite-element...
Through the analysis of three-dimensional hub model by using finite element, detailed stress distribution is obtained. On this basis, the dangerous sections of structural discontinuity regions are made stress analysis and classification by using stress linearization method, the stress evaluation is carried out through using design by analysis theory. The results show the structure is safe and reliable.
The crankshaft is an important component of diesel engine. In this paper, a three-dimensional model of a diesel engine crankshaft was established corresponding to the practical conditions by Using PRO/E software. Using ANSYS analysis tool, the finite element analysis for the crankshaft was conducted under extreme operation conditions, and the stress distribution of the crankshaft was presented. The...
Finite element analysis has been used to investigate the vibration modal of 480 crankshaft and the stress analysis of crankpin. The aim of the modal analysis was to explain the relationship between the frequency and the vibration modal. And the aim of the stress analysis of crankpin was to find the maximum deformation and maximum stress point. In this paper, three-dimension models of 480 diesel engine...
To establish three dimensional finite element model of the whole cervical spine and investigate biomechanical characteristic of the human cervical spine for application of clinical diagnosis and therapy. Method: A healthy adult female was subjected, three dimensional finite element model of the whole cervical spine was established using the method of 3D interpolation with CT. Result: The model included...
This article established the pelvis models with aeolotropic material property, and made modeling and mechanical analysis of the acetabular transverse fracture models treated with different internal fixation methods. The mechanical indexes we interested in are as follows, the maximal displacement, the maximum equivalent stress and the maximum stress around the fracture line. Through the compare of...
Based on the elastoplasticity contact finite element theory, the high contact-radio gear three dimensional static state finite element analysis model was established, The Newton-Raphson method is used to get the statics contact stress and load distribution factor of gear teeth, and the influence of different fricton coefficients. Comparison with Hertz contact stress, the correctness of this method...
Railway vehicle structures endured multiaxial fatigue loads in the service process, which aroused many difficulties for bogie frame's design and analysis. In this paper, firstly, the basic theory of multi-axial fatigue was explained. Secondly, the modeling methods of finite element analysis and stress state under standard loads were analyzed. Finally, three methods (maximum principal stress, Mises...
Recently, sliding contact mechanisms are being used to supply current to rotating or moving objects in a number of industrial applications. In this paper, we examine the heating and deformation that affects the contact areas of these sliding contact mechanisms by means of experiment and numerical analysis. In both the experiments and the finite element method (FEM) analysis, deformation was observed...
ANSYS/LS-DYNA finite element software is applied to analysis shocking simulation for washing machine and its packaging with different postures (surface, edge) and different dropping heights. The yielding critical dropping height of suspender is obtained. The response acceleration curves, effective stress and plastic strain cloud fringe distribution on washing tub and shell are also available. The...
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