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The analysis of three-dimensional (3D) braided composites is difficult due to its complex microstructure. A novel representative unit cell (RUC) and shear specimen model is introduced to predict elastic properties and failure behavior of 3D 8-harness satin weave composites fastener under shear load. The RUC model is developed to predict engineering constants of composites in several damage status...
In order to study the influence of dynamic load for CNG cylinder frame in a new energy coach, the finite element model of CNG cylinders and frame was developed with 3D reverse engineering and the finite element method. The strength analysis was performed by loading 6.6g acceleration in the forward direction and 5g acceleration in horizontal direction according to ECE R110 regulations requirements...
The ultra-precision positioning stages are generally used in high precision positioning engineering fields, such as in biomedical genetic engineering, precision optical engineering, MEMS manufacturing and other fields. In this paper, an ultra-precision positioning stage is introduced. The flexure hinge is treated as a three nodes element with varying cross-section, in which each node has three degrees...
A novel representation model of joint interface was constructed based on multi-scale surface profiles. The contact surface profiles at different loads need different-scale asperities to support, and the asperities at different scales were equivalent to groups of springs in parallel with different size and stiffness, so the joint interface was equivalent to the coupling of series-parallel springs and...
A coring rock sample test-bed is primarily used to drill the core with appropriate size for laboratory analysis. According to the design requirements, the structure of coring rock sample test-bed is designed. On the basis of the preliminary design, the test-bed model is created with the Solidworks. And then linear static analysis and model analysis are conducted with the finite element analysis software...
Pin-loaded joints are frequently used to assemble tempered glass panels in the glass curtain walls. The contact between the surface of different parts and the rotation of the pin-loaded joints can not be ignored when the work is concerned about cycling load. This paper investigates all important aspects for modelling the glass panels coupled with pin-loaded joints through carefully parametric studies...
In this paper, nonlinear finite element analysis about the semi-rigid connected steel frame and top and seat angle with double web angles semi-rigid connection are carried out with ANSYS finite element software. The analysis is a complicated nonlinear problem, which includes plastic development of metal material, geometrical nonlinear caused by large deformation of the structure and contact. Results...
This paper aims at seeking a practical method for simulating the rigidity test of automotive steel wheel. This test of automotive wheel is numerically analyzed by combined use of nonlinear finite element analysis and plastic mechanics approach. The wheel modeled as an elastic-plastic body is mounted at a horizontal brake basement by four bolts. During the numerical analysis, supporting areas, contacting...
High precision structural Finite Element Analysis (FEA) results are required in the development of a remote image sensor. HperMesh and MSC.Nastran are employed in the image sensor structural FEA. This paper discusses some technical issues about the Finite Element (FE) modeling of the image sensor. In order to obtain authentic analysis results, the part-to-whole handling schema, i.e. handling method...
Bolt-flange joint structure is a complex nonlinear system. A three-dimensional finite element analysis on the mechanical behavior of bolted joints under the external applied load with considering the contact of the joints interfaces is presented. The results are compared with the traditional linear finite element analysis which makes the flange surfaces fixed together. It is shown that the linear...
Loader working device is a big structure that consists of six complex members. And it is difficult to calculate inner stress accurately and confirm the largest stress location. But finite element software can treat it easily. And stress results are precise and consistent with actual situation. Furthermore, only the largest load case was taken in past analysis, which make loader members size larger...
The objective of this paper is to analyze the stress and displacement of the fracture of neck of femur after fixing with a new design screw. In particular, the finite element model of the proximal femur, which was developed for different material properties of compact bone and spongy bone, had been accurately solved by aids of these software- MIMICS and ANSYS. To simulate the environment of the fracture,...
In this paper, the models of the base of a type vertical motor were adopted to MSC. NASTRAN software to analysis modes and transient response, get transient response, natural frequencies and vibration shape based on element finite simulation, and the mechanics capability was proved, these main destroy forms and locations were gained. The effect of the vibration of the motor was also discussed according...
The blast load response of precise bolt finite element model was studied by LS-DYNA software. Firstly, the initial stress of thread was added by the dropping temperature method. Then the dynamic response and deformation damage of the bolt model were calculated by the elastic-plastic constitutive material equation and surface-surface contact algorithm, which calculating models including bolt joint...
The simple, reliable and feasible finite element model with three-dimensional solid elements about blind hole bolt connection based on ANSYS is proposed to obtain bolt pre-tensional effect. It uses node coupling to simulate the connection effect of the thread and applies preload to the bolt in order to achieve pre-tensional effect by using the pretension elements in ANSYS. The FE model would be of...
An accurate and efficient equivalent beam model(EBM) for a planar compliant mechanism with ellipticalflexure hinges is presented. First, based on 3D finite element analysis (FEA) for one-eighth of a single elliptical flexure hinge, a set of fictitious beams with identical stress and stiffness characteristics is derived. Then the static and dynamic performances of an eight-bar compliant mechanism with...
Numerical calculations concerning the dynamic behavior of a railgun are presented. At the first stage, the structural problem can be decoupled from electromagnetic phenomena as well as from the local projectile behavior. The magnetic pressure repelling the rails from each other and expanding with the speed of the projectile serves as a boundary condition for purely mechanical calculations. The particularity...
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