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We reveal the reason behind a haptic illusion called the Velvet Hand Illusion (VHI) by FEM analysis. We also investigate the possibility of using the results of the analysis to design a haptic display which utilize VHI. In VHI, a person rubs his/her hands together on both sides of wires strung through a frame and produces the sensation of rubbing a very smooth and soft surface like velvet. We focus...
We have proposed a hollow tube type micropump which integrates a liquid flow driving part such as a PZT piezoelectric material and a tube part. And the flow function demonstrated by the hollow tube type micropump was evaluated and it is confirmed that the flow velocities by the pump were increased and decreased. We examined the improvement of the pump. Here, it is effective to give a large vibration...
In this study, we propose new type of a low-cost flexible tactile sensor which can detect 3-axial force and suitable for intelligent robot fingers. In order to propose innovative device, problems of previous studies about materials and structures were analyzed and fabrication process is used by the polymer micromachining technique. The designed tactile sensor is comprised of several micro force-sensing...
This paper reports a theoretical investigation of the strain sensitive effect of a 2D photonic crystal (PhC) nanocavity resonator for mechanical sensing applications. The nanocavity is created by missing a circle of air holes in the array of triangular lattice of air holes. The strain sensitivity of a high quality factor PhC nanocavity has been investigated based on the finite element method (FEM)...
A critical problem facing the mechanical design community is that of bridging the gap between mechanical CAD data and finite element models.In this paper, We developed a 2D finite element analysis (FEA) data creating system in which the data is generated from DXF (drawing interchange file) data, which is one of the most famous CAD data. The system is proposed and the usefulness of the system is clarified...
The finite element method (FEM) is presented in this paper to research the noise of axial flux surface mounted permanent magnet synchronous machine (AFSMPMSM), and the noise of AFSMPMSM is analyzed and calculated by using analyzing software of FEM. The two results of FEM calculation and sample machine's experiment are contrasted, and it is proved correctly of using this FEM to calculate the noise...
In order to improve the structural performance of a five-axis gantry milling machine, a design idea of adopting parallel optimum design for key components and complete machine was investigated. Using CAE (Computer Aided Engineering) software, the finite element analysis model of the five-axis gantry milling machine key components and the complete machine were established. Then the static stiffness...
Asphalt Pavement was damaged more seriously in longitudinal Gradient than common segment because of its special load bearing conditions. This paper advance A simple model of 3D Visco-elasto-plastic Finite Element to analyses the discipline of stress-strain behaviors, using Burgers model to study the distribution of rutting under different longitudinal gradient and frequency of tyre load. The result...
Shot peening is a cold working process which induces compressive residual stresses in near-surface layers and thus improves the fatigue strength of components. Shot peening involves the complex stress histories with stress reversals and cyclic loading conditions. In the study, using combined hardening model, the quasi-static simulations of the shot peening process are carried out with the help of...
In applications where high stiffness, high accuracy, high speed, high payload, and good dynamic performance are predominant requirements, parallel manipulators offer obvious advantages over serial ones. However, dynamic modeling and analysis of parallel manipulator, which are characterized by multiple closed-loop chains, are generally more complex than in the serial mechanism case. Especially, dynamic...
In this paper based on the assumption of the isotropic elastic soil, Modified Winkler Foundation Model is established and a equivalent stiffness equation which considering the shear function of soil is derivated. The modified Winkler foundation model is compared with three other equivalent spring stiffness to study the sensitivity of the parameters. Pile-Soil interaction of FEA models are studied...
Three finite element (FE) models were compared for a self-anchored suspension bridge in order to obtain the appropriate analysis model that provides the basis of long term monitoring and safety evaluation for the bridge. The shell element and two types of beam elements based on grillage method are used to simulate the steel box stiffening girder of the bridge. One of the beam elements is the element...
On the basis of three-dimensional finite element modeling method, a cutting model is built in accordant with the real working environment. In the simulation, some results including the temperature distribution, cutting force variable and stress field were obtained. The simulation result can help to improve and optimize the parameters of the real turning process, to reduce costly and time consuming...
Plastic profiles produced by extrusion die are cooled down and calibrated by calibrators, so it is very important to properly design the cooling system in calibrator for the profile quality. Based on the finite element method (FEM) and the finite difference method (FDM), the numerical simulation of the cooling process is realized for plastic profile within calibrator. The simultaneous shape and topology...
Chongqing Chaotianmen Yangtze River Bridge with the main span of 552m is an urban bridge of double deck bridges for highway and rail, which need to verify fatigue security performance of the node on bottom chord . Through the calculation of the full bridge's space finite element, the node for study is determined as the M29 and calculate and calculate the internal force influence line of M29. Load...
A new structure of micro-probe for friction force microscope (FFM) was presented, which has a double cantilever beam for the detection of the friction force and a torsion beam for that of the normal force. It is expected to overcome mechanical crosstalk by friction and normal forces, which causes a significant error in quantification of local friction forces for conventional FFM probes. However, the...
This paper investigates the influence of soil-structure interaction (SSI) on seismic responses of long-span space truss roof. First, a three-dimensional (3D) integral finite element (FE) model of a typical regular pyramids space truss structure consisting of space truss roof and support columns is developed. By applying FE method for near field soil and infinite element (IE) method for far field unbounded...
The serial design theory was used to analyze and calculate the main components of sheet metal forming hydraulic machine,identify the key parameters of its component parts, establish the size parameter library of the structural characteristics of the parts and modularization thought was adopted to research parametric CAD intelligence design system of sheet metal forming hydraulic machine. By inputing...
In order to study how to reduce the creep of prestressed concrete beams by construction methods, in this paper, two tools are employed - laboratory tests and finite element modeling .In laboratory test, four of scale 1:6 specimen was produced based on some practical projects, and different prestressing program is designed. By comparing the twice tensile influence on the creep of prestressed concrete...
The steel box beam in the Gulf Bridge adopts huge segment lifting construction method, with steel tube falsework as a temporary bridge pier. In this paper, established the finite element model of the steel tube falsework, determined the relevant calculation parameters according to the applicable bridge codes, calculated working conditions and the load, and analyzed the stability of the falsework....
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