Engineering Assignment: Finite Element Modelling
Added on - 28 May 2020
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Finite Element ModellingA finite element modelling is consisting of three stages: Pre-processing (initial step), Processing(intermediate step) and post processing (final step)Pre-processingPre-processing, also known as model preparation, is typically the most labour-intensive step inFEA.For the observer of the component surface, this usually means the disassembly of thecomponent into small parts, the finite (i.e. small but finite) elementsFirst of all, we designed the required part in Solidworks with given geometric dimensions.Fig. 1. 3D model of Stiffened plateAfter creating the model in Solidworks, save it as IGES format so that we can export in to Abaqus.Now, open Abaqus CAE from program list and import the above file.
The stiffened plate will be visible in the modelling area of abaqus.Thenext stepis theassignment of the material, because the ability to bear external loads dependsheavily on the material. To create a material with required properties, click the Module tab and chooseproperty from drop down menu.To create a new material chose the first option ‘Create Material’ in the left taskbar and a window willpop upName the material as steel and apply following propertiesYoung’s Modulus, E=200GPaPoisson’s Ratio, ν=0.3Density, ρ=7800kg/m3All the calculation done here is in millimetre, Newton, second and Ton (mm, N, s, Ton).
Create a solid homogeneous section and apply it to the plate, you will see a color change in platewhich confirms that the section has been successfully applied.Fig. 2. Model with assigned solid sectionNext Step is meshing, choose meshing from the Module drop down menu.Since, our geometry has curves, we will use tetrahedral meshing option with element size as 35 mmFig. 3. Meshed Geometry
To apply boundary conditions, we have to make several sets of nodes and surfaces. To create a set click onToolsSelect all the nodes on the circumference on the plate and create a set names circumference.Same as above procedure, create a surface using tools option and the surface to be selected is the non-stiffened side of the plate.Now, to apply loads choose loads from the Module.Create a pressure load of 5000N/m2on the non-stiffened side.Fig. 4. Plate with constant pressure on the non-stiffened side