The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The shape parameter is proved to have great influence on radial basis function (RBF) interpolation. Its impacts on multiquadric (MQ) RBF are studied in this paper. Observation suggests that a large shape parameter improves the accuracy of the approximation of high nonlinear problems, but may lead to Runge phenomenon (RP). This paper proposed an algorithm to obtain the shape parameter by minimizing...
The research of autobody lightweight technology is an important mainstream in the autobody design. In this paper A FEM model for the unitary body of a home-made bus is established .Then optimization design variables are determined through stiffness sensitivity analysis and by using finite element analysis software, an optimization is conducted, based on which a lightweighting scheme is put forward...
This paper presents a computational approach to accurately calculate the effects of the wafer-to-wafer oxide thickness (Tox) variations on the extracted TDDB parameters. Methodology relies on the available experimental data from the TDDB tests performed on wafers from the 0.35 ?? technology on the line of production. Wafer-level Tox variations are included too. Results show that the effects on gate-oxide...
Sindhi is an open syllable language cv; most of its words have vocalic ending and the occurrence of irregular consonants. We had digitally investigated eight classes of syllables reported by Jatoi. The object of this paper is to analyze the actual syllable patterns occur in Sindhi and the frequency of syllable patterns. The syllables consist on Vmacr, CV, CVmacr, CVmacr V, CCVmacr CCVmacr C, CVmacr...
According to the fatigue test norms of the chain drive in ISO15654-2004, distribution law of fatigue life of silent chain has been studied based on fatigue reliability test of silent chain CL04T-9, used of the group method and the movement method. Relationship curve between the fatigue life and the load level corresponding to the different relative reliability has been established. The harmonic relationship...
Objective: To find a new way to culture osteoblasts. Methods: Rat mesenchymal stem cells (MSCs) were cultured with mechanical stress by (XX) 10 mins a day for seven days. Giemsa staining was used to tell the shapes of the cells and alizarin red S staining was used to detect the formation of osteoblasts. Results: (1) The shapes of the cells suffered with the mechanical stress were not as the same as...
Two kinds of experimental dies containing class "A" surface feature of auto body outer panel are designed and manufactured in order to emerge the surface wrinkle of auto body panel. By doing stamping experiment in the dies, the wrinkling phenomenon is observed. At the same time, numerical simulation based on an independently developed commercial CAE software KMAS/UFT of sheet metal forming...
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...
The simulation of crack propagation by mean value method (MVM) is discussed, in which advanced refining and remeshing strategies are proposed and then used. Two benchmark problems are analyzed by MVM and compared with standard FEM. It is found that MVM can provide significantly better accuracy in both displacement and energy norms. Numerical results of fracture problems are found to be good agreement...
A one hand drive wheelchair with power assist mechanism is developed. In this investigation, we propose a simple and useful manipulation torque detection method which yields wide detection areas with uniform distribution of stress. This method can be applied to a one hand drive wheelchair with complicated structure of manipulation mechanism with three rings. Moreover, even if the grasping position...
Interfacial delamination of the leadframe pad and encapsulant is the precursor to type I popcorn cracking. Due to high stress concentration at the corner of the interface, delamination usually initiates and propagates from the corner of the interface. The mechanics of delamination propagation from such a corner is three dimensional and can best be studied with a 3D model. When adopting the fracture...
Soil cave foundation is common in Karst area, which damage would impact the stability of the foundation. Currently, the qualitative analysis of the collapsed mechanism has been done, but few of quantitative. Based on the theory of elasticity and plasticity, the stress condition and influence circle of concentration around the cave is researched. The calculated model of stability of the foundation...
This paper proposes a parametric simulation plan for UBM geometry with different UBM rim angles, diameters and thicknesses. The parameter plan for the solder bump with different heights and diameters, and different shapes is also investigated. The goal of this study is to understand the impact of the die shrinkage on solder joint reliability under electromigration failure, and to optimize the UBM...
In consideration of the fact that the former curves do not rely on that the damaged major cause of arch dams is the short of the concrete tensile strength but is related to the dam height and the concrete compressive strength, a new curve is brought forward in this paper, in consideration of factors of the concrete tensile strength, the dam height and the width of canyon. And the distributing chat...
Recent advances in system miniaturisation have led to the development of a multitude of new sophisticated multifunctional electronics. Efficient application of these devices to creating smart objects by embedding digital systems into materials is currently hampered by challenges posed by the system integration and packaging. High stresses induced by the embedded packaged systems are particularly detrimental...
In this study, Sn-0.7Cu solder alloy was reinforced with Al2O3 (50 nm) and ZrO2 (45 nm) nano particulates to form Sn-0.7Cu/Al2O3 and Sn-0.7Cu/ZrO2 composites. The volume percentge of the Al2O3 and ZrO2 nanoparticulate reinforcement was kept at 1.5%. The composites were synthesized using powder metallurgy technique assisted with microwave sintering and incorporating hot extrusion as secondary processing...
This paper presents a new technique to generate triangular mesh surface parameterization and characterize 3-D surfaces by invariant spherical harmonic shape descriptors of objects with spherical topology. First, the surface is initially parameterized by defining a continuous one-to-one mapping from the surface of the object to the surface of a unit sphere. Then, the initial parameterization is optimized...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.