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This paper addresses the problem of heterogeneous deformable model accuracy using the finite element methods (FEM). Classic FEM uses predefined shape functions for interpolation and does not account easily for regions of discontinuities. Extended finite element methods (XFEM) use enrichment functions to compensate for the change in an element degrees of freedom (DoFs) in deformable objects. The XFEM...
In this paper we deal with full-wave modelling of pulsed terahertz systems utilized in non-destructive testing. At the outset, some basic information on the terahertz NDT and next general remarks on its numerical modelling are presented. Frequency domain FEM and time domain FDTD analysis is carried out. Finally comparison of computed and measured signals is shown in order to prove numerical analysis...
The use of Numerical Control and computers in manufacturing has enabled the development of new sheet forming processes. One of these flexible processes is called Incremental Sheet Forming (ISF) in which deformation is localized by the movement of a spherical or flat forming tool. ISF is carried out regularly by a CNC machine tool or by a Robot, which follows a tool-path generated by CAM programs,...
For the series of U-channel section, which has similar structure, it is easy to adjust the geometric model of U-channel section by using parametric design method, the efficiency is improved and the time for product design will be shortened greatly. By using the ANSYS Parametric Design Language (APDL), the FEA process including creating FEA model and analysis steps is discussed with the finite element...
For a solution of repair welding, the welding process of the entire multi-layer multi-channel is simulated and analyzed. The results show that has the big welding residual stress and distortion nearby welding joint as a whole, the residual stress is bigger away from the welding joint nearer, and the residual stress existence's high-risk spot is revealed. It provides a theoretical basis for the enterprise...
It is always difficult to model the viscoelastic damping material accurately in a dynamics analysis, because the frequency has great influences on characters of the viscoelastic damping materials. This paper presents an iteration control program based on QR damping modal extraction method in ANSYS for calculating the structure modal damping ratio more accurately.
Finite Element Method (FEM) model was built and model analysis was executed for a thin-wall cylinder dynamometer with ANSYS, the natural frequencies and modal shapes of the dynamometer are obtained. The topological optimization was done with the variable-density method. The utilization rate of materials was improved, and the lower model frequencies were increased.
To research the subdivisions of mesh about the semi-elliptic surface crack and stress intensity factors, this paper founded finite element model by simulating the semi-elliptic surface crack of the super-strength steel in FEM Analysis,the crack region is subdivided using a mapped mesh while the automatic tetrahedral mesher is used in the region outside the crack region, this example is also illustrating...
The tangential constitutive matrix is derived in the paper for the nonlinear finite element computation of rubber material as the strain energy function is expressed by Mooney-Rivlin model. The stress and strain of constitutive relation are separately expressed by Piola-Kirchhoff stress and Green strain with Lagrange description. As the incompressibility considered, the strain energy function is decoupled...
In this paper, the strength of the steel plate silo is calculated according to the relevant design specification. The finite element software SAP2000 is used to model and analysis the silo base on the finite element method. The results based on the two methods are compared and the good agreements can be obtained, indicating that the finite element model is correct.
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...
Aimed at problems that wrinkling and crack lie in the forming for the cylinder-shaped part, the program DYNAFORM is used to simulate the drawing process of the cylinder-shaped part to optimize forming process. Based on physical simulation, the effects of property parameters and blank holding force on deformability are studied in sheet metal drawing. The simulation result indicates that increase of...
In this paper, the topology optimization design of two-material micro compliant mechanism that allows for treating local stress constraint is investigated. A mathematical model is constructed in which the mechanical advantage of the mechanism is posed as objective function while displacement constraint, material constraint and stress constraint are considered simultaneously. The element free Galerkin...
Based on the elastic-plastic properties of moulded pulp material, the strain fields and stress fields of a large-scaled moulded pulp pallet under compressive load are analyzed by using of finite element software ABAQUS. Results indicate that the elastoplasticity must be considered for accurately forecasting the mechanical respond of large-scaled moulded pulp pallet. Furthermore, the maximal loading...
There are many reports about pre-deformation on microstructure and mechanical properties of the alloy, but none about the CoCr alloy. This research proposed solutions to the compression and expansion test of the stents, and established an accurate test method to assess the mechanical properties of products, analyzed the pre-deformation on it and summarized the stress-strain characteristics of the...
In a typical arc spray prototyping process, two metal wires was melt by electric arc at certain distance and sprayed to the mold surface with high speed compressed air from the jet. To prevent failures such as deformation and cracking, homogeneous temperature field distribution was required for every spray layer. This can be achieved by optimizing the processing parameters using numerical simulating...
Based on the large span space structure of Ordos's airport extension project, a construction technique of curve pushing accumulating sliding was put forward and the principle of which was elaborated. A whole set of construction techniques was proposed, which included the design of three-directional bearing slipway and skied beams, friction-reducing technique and anti-friction materials, analog loading...
Packer's rubber is the central part, of which working mechanics is a typical material and geometry non-linear contacting problem. Based on the work principle of high pressure seal and block device in FGQ 9-5/8 “X7”, working on with ANSYS, here in this article, it analyses the touch stress and pressure in the inner wall of the rubber part in the way of non-linearity finite element. According to the...
YG500/80 Circular Stacker Reclaimer is a large equipment of homogenizing granular material, which combine cantilever material piling machine with scraper conveyor. the equipment has the characteristics of large span and Cantilever operating distance and often work in bad conditions. This paper focuses on the mechanical property of the key parts of the Circular Stacker-Reclaimeris, using ANSYS to analyse...
Mechanics analysis model of laminated solid armature is established by finite element in this article. The orthogonal method is applied in simulation experiment of laminated armature. The contact pressure between armature and rail is studied based on parameters of armature's thickness, material, layers, and length of the tail. Using range analysis method, contained by orthogonal analysis, the order...
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