An interactive graphics system to facilitate finite element structural analysis

The characteristics of an interactive graphics systems to facilitate the finite element method of structural analysis are described. The finite element model analysis consists of three phases: (1) preprocessing (model generation), (2) problem solution, and (3) postprocessing (interpretation of results). The advantages of interactive graphics to finite element structural analysis are defined

Finite element analysis of fretting crack propagation

In this work, the finite elements method (FEM) is used to analyse the growth of fretting cracks. FEM can be favourably used to extract the stress intensity factors in mixed mode, a typical situation for cracks growing in the vicinity of a fretting contact. The present study is limited to straight cracks which is a simple system chosen to develop and validate the FEM analysis. The FEM model is tested and validated against popular weight functions for straight cracks perpendicular to the surface. The model is then used to study fretting crack growth and understand the effect of key parameters such as the crack angle and the friction between crack faces. Predictions achieved by this analysis match the essential features of former experimental fretting results, in particular the average crack arrest length can be predicted accurately

Finite element analysis of photonic crystal fibers

A finite-element-based vectorial optical mode solver, furnished with Bayliss-Gunzburger-Turkel-like transparent boundary conditions, is used to rigorously analyze photonic crystal fibers (PCFs). Both the real and imaginary part of the modal indices can be computed in a relatively small computational domain. The leakage loss, the dispersion properties, the vectorial character, as well as the degeneracy of modes of the fibers can be studied through the finite element results. Results for PCFs with either circular or non-circular microstructured holes, solidor air-core will be presented, including the air-core air-silica Bragg fiber. Using the mode solver, the single-modeness of a commercial endlessly single-mode PCF was also investigated

Finite element analysis of wrinkling membranes

The development of a nonlinear numerical algorithm for the analysis of stresses and displacements in partly wrinkled flat membranes, and its implementation on the SAP VII finite-element code are described. A comparison of numerical results with exact solutions of two benchmark problems reveals excellent agreement, with good convergence of the required iterative procedure. An exact solution of a problem involving axisymmetric deformations of a partly wrinkled shallow curved membrane is also reported

Virtual Enriching Operators

We construct bounded linear operators that map $H^1$ conforming Lagrange finite element spaces to $H^2$ conforming virtual element spaces in two and three dimensions. These operators are useful for the analysis of nonstandard finite element methods

Finite Element Analysis With Static And Dynamic Conditions Of Spare Wheel Carrier For Oh 1526 Fabricated By Saph 440 Hot Rolled Steel

Spare Wheel Carrier is a component that must exists in a heavy duty vehicle. The function of this part is to store additional wheel in order to deal with punctures that might happen to the tire. This part is usually placed in the middle of the vehicle in order to maintain the position of center of gravity of the vehicle. The purpose of this research is to analyze the strength of SAPH 440 as the manufacturing material of the Spare Wheel Carrier from one automotive company. The Spare Wheel Carrier will endure a load of a replacement tire for its entire cyclic load. The load itself will generate stresses and strains in the part, especially in the welding joint. Therefore, the analysis is to be done to provide the automotive company with the result to determine improvement that should be made. The method that is used in this research is using CATIA software to create the three dimensional model of the part. Later, we import the model to ANSYS software to analyze the equivalent stress, equivalent elastic strain, directional deformation, and cyclic load for steady load, live load, and shock load. The calculation shows that the part can endure the force from steady load, with the estimated cyclic load of 70,723 cycles. But for live load, the stress and strain will be happening around the yield strength and offset yield strength and the estimated cyclic load declining significantly to 6,358.6 cycles. Furthermore, the shock load result stated that the stress and the strain are exceeding the yield strength and reduces the estimated cyclic load to 1,843.9 cycles. In conclusion, the material is proven to be safe for USAge as the Spare Wheel Carrier manufacturing material.Keywords. spare wheel carrier, SAPH 440, stress, strain, deformation, cyclic loa

Finite element analysis of wrinkling membranes

The finite element analysis of wrinkling membranes was investigated. The determination of stresses and deformations within large partly wrinkled membrane surfaces is a problem of significant technical interest in such areas as conceptual design and analysis of ultra lightweight spacecraft structures. A closed-form solution to an axisymmetric problem involving partial wrinkling of an inflated shallow membrane was obtained. In particular, a membrane in the shape of a sperical annulus was considered. The outer edge of the annulus was assumed to be fixed so that no displacements occur along the outer perimeter. The inner edge is assumed to be clamped to a rigid movable plug. Solutions for the complete stress, strain, and displacement fields under the assumption of inextensional material behavior are presented for the case of pure torsional loads applied to the plug, and for the case of pure axial loads applied to the plug

Finite Element Analysis for the Buckling Load of Corrugated Tubes

The buckling behavior of the geometry subjected to static loading (compression) is presented. The columns under consideration were made with corrugation perpendicular to the line of action which coincides exactly with the unstrained axis of the column. Four different arrangements of tubes have been considered for all the conditions taken into consideration. The thickness of the tubes, the number of corrugation, and diameter of the tubes, pitch and depth of the tubes have been varied accordingly. Analysis of the prepared tubes was performed using ANSYS 17.0. A linear buckling analysis was performed to calculate the critical load of the corrugated tubes. The effect of buckling and maximum critical load of the FEM models are discussed

Finite element Analysis of Honeycomb filled Metallic Tubes Subjected to Axial Loading

A comprehensive study of buckling behavior of polygonal tubes with honeycomb filler under axial loading is presented in this paper. Honeycomb filled tubes have got a lot more attention due to their strong and stiff behavior with enhanced energy absorption capacity. For simulating the buckling behavior events of finite element models eigen value buckling code was used using the Abaqus/Explicit. This paper firstly investigates the buckling behavior of polygonal tubes without honeycomb filler and then the antipodal with honeycomb filler. The calculated buckling response of polygonal tubes is shown to better resembled when honeycomb filler is used