slide 6 finite elements
TRANSCRIPT
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CHAPTER 6
FINITE ELEMENT
METHOD
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Outlines
1. Introduction
2. Finite Element Modelling
3. FEM Software
Pre-Processor
Post-Processing
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Introduction [1]
FE modelling process allows fordiscretizing the intricate geometries intosmall fundamental volumes called finite
elements. Equations being assembled by taking
proper care of the constraints andloading.
By solving the equations, results thatdescribe the behaviour of the originalcomplex body being analyzed.
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Introduction [2]
Application of FEM:
Stress analysis
Dynamic analysis
Deformation analysis
Fluid flow analysis
Heat flow analysis
Seepage analysis Magnetic flux analysis
Acoustic analysis
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Finite Element Modelling [1]
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Finite Element Modelling [2]
The displacement, stress, strain and
loading can be written as follows:
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Finite Element Modelling [3]
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Finite Element Modelling [4]
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FEM Software [1]
1. Converting the geometry into thediscretised elements, and calculating
various properties for each individual
element such as geometry, materialproperties, constraints and loading.
2. Apply global equations, solving the
governing equations and obtaining theresults.
3. Interpreting the results
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FEM Software [2]
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Pre-processor [1]
1. Modelling the geometry2. Generating the finite element mesh by
making a suitable approximation to the
geometry.3. Calculate the nodes and elemental
properties.
4. Allow specification of boundary andloading conditions.
5. Allow material properties to bespecified.
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Pre-processor [2] - CAD
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Neutral
File:IGES / STEP
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Pre-processor [3] - Mesh
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Post-processing [1]
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Processing a large amount of datagenerated and converts it into an easily
understood form for the design purpose.
Structural Analysis Displacement / Stress/ Strain / Loading /
Reaction/ Plastic strain/ Creep Strain / etc
Thermal Analysis Potentials / Fluxes / Gradients / etc
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Example: LUSAS FEA Software
Boundary Conditions
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Example: LUSAS FEA Software
Stress Contours
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Example: LUSAS FEA Software
Displacement Contours
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Example: LUSAS FEA Software
Distance along section
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FEA Software
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