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Thermal stress and deformation depended on CCD Si3N4/SiO2/Si composite dielectrics thickness was simulated by ANSYS. The simulation results were indicated that the thermal stress of each dielectric film was constant and did not depend on the dielectrics thickness, and the deformation distribution was ring from vertical view, and the extremal deformation was located in the structure center whatever...
Along with the rapid expansion of the arch dam technology, the shapes of dams are becoming increasingly diversified. In order to obtain the better shape designing quality of being economical and logical, rapid developments of shape design optimization are under way. Within the optimization, the key issue is to find out the economic target function aimed for minimum cost together with maximum efficiency...
In order to improve density uniformity of compacted artificial marble slab, the paper analyzes the working process of vibrating compactor, points that the traditional motion mode of vibrator may cause uneven distribution of materials and proposes a new mode of motion. Lastly, using the finite element software ANSYS, we have performed the stress analysis of the whole working process, and obtained the...
A single crankshaft of 8L250 diesel engine using a finite element model is established, which used Pro-E and ANSYS-workbench software in this paper, and a finite element analysis is done in force and displacement boundary conditions. The maximum stress point is found, and under the premise of not affecting the basic structure of the crankshaft the optimization improvements to reduce the stress concentration...
In order to study the impact of the cracks, which is on the semi-regrid base, on the stress absorbing layer during the old road rebuilding, the impact of the surface thickness, surface modulus and the stress absorbing layer thickness of bituminous concrete pavement structure, which have cracks on the base, on the stress of the bottom of topping of road was analyzed by the numerical analysis method...
The theoretical analysis of finite element method for buckling phenomenon to finite-sized shell structure is first introduced. Then, a real application using a probe for detecting the pressure inside turboprops is analyzed thoroughly with ANSYS10.0, including section profile, dimensions, and local characteristics. Based on the solved results, several rules between critical load and influence factors...
This paper mainly investigates the carbon material femoral head which is used in the semi-hip replacement. Firstly the 3-D finite element model of the acetabula contacted with the prosthesis of different materials were established and calculate the acetabula's cotacted stress. Thought comparing the contacting stress of the acetabular, the effect of different material with quite different property...
A nonlinear simulation using the finite element method (FEM) was performed to analyze the interaction between the balloon and cardiovascular stent during stent expansion. A tri-folded balloon was constructed, and the frictions between the balloon and stent were considered in the model. In this FEM model, the stent was compressed onto the balloon surface before the expansion, in accordance with the...
Precision bar cutting process is a typical large localized plastic deformation process. Based on its forming characteristics, a numerical model is established and an elasto-plastic simulation is performed using the finite element method (FEM). The re-meshing method is used when the severe element distortion occurs to facilitate further computation and avoid divergence. The Normalized Cockroft &...
Stiffness design of rod fastening rotors is seriously concerned about by manufacturers. In order to reflect dynamic characteristics of rod fastening rotors accurately, elastic contact model is established on the axial contact surfaces between discs for rod fastening rotor firstly. This model assumes that a layer of uniform springs distribute on the contact surfaces and rod fastening rotor is a set...
Bit-pattern media is a promising approach for further increasing the recording density of future magnetic disk drives. Also, future high density recording requires further reduction of the magnetic spacing between head-slider and disk-media. As a result, the chance of slider-disk contact will be increased and the stress caused by such contact becomes an important issue for future disk drives. This...
In the pursuit of areal recording densities towards 10 Tb/in2, patterned media technology as well as the technology to reduce magnetic spacing between the slider and disk have attracted great attention. As a result, contact stresses can be encountered at the head-disk interface (HDI). Detailed knowledge of the stress distribution due to inelastic deformation at asperity microcontacts is therefore...
The key consideration in heat treatment model is phase transformation kinetics under non-isothermal cooling. In this study, a program is developed to predict austenite transformation by kinetics model under non-isothermal conditions. For doing so, the classical additivity rule and Avrami-type rate equation is evaluated to handle the phase kinetics under non-isothermal conditions. And comparing with...
In this paper, the two-dimensional model of the CBGA device is established to study its mechanics behavior under thermal cycling conditions by ANSYS. The results show that the position of the maximum stress located on the outmost solder balls of the device, where it would cause cracks easily and damage the device. The three-dimensional model (containing a single solder ball) of the CBGA device is...
The design and analysis of quartz crystal resonators in the fundamental thickness-shear mode have been extensively studied with many methods including the simple model based on finite plates for the vibration frequency and Mindlin plate theory for couplings of the fundamental thickness-shear and spurious modes. These methods are widely used in the design process for the optimal determination of crystal...
The discrete theory of finite element for curved structures is first introduced and the discrete error is analyzed theoretically. Then, as an illustration, a probe for detecting the pressure inside turboprop is meshed by 3D degenerated shell element with 4 different methods, and the characteristics and adaptive conditions of the methods are discussed. The stress of the probe is numerically calculated...
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