Lecture_Intro

Lecture_Intro - MAE MAE162D Lab ProductDesignUsing...

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MAE 162D – Lab Product Design Using Finite Element Analysis (FEA) R. S. Shaefer & Tamer Crosby (TA) Mech. & Aerospace Engineering Dept., UCLA inter 2011 Winter 2011 1 MAE 162D FEA Lab Winter 2011
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AE 162D A B Lecture Outline MAE 162D FEA LAB Lecture Outline ± What’s so great about FEA ? ± FEA Lab Manual ± Introduction to FEA FEA Syllabus 2 MAE 162D FEA Lab Winter 2011
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MAE 162D FEA LAB Lecture Outline ± “Finite Element Analysis has become an important tool to examine designs for their performance under load before a hysical prototype exists.” [1] physical prototype exists. [1] ± he three primary advantages of FEA are: The three primary advantages of FEA are: 1. Reduce cost by simulating the testing of your model on the computer instead of expensive field tests. 2. Reduce time to market by reducing the number of product development cycles. prove products y quickly testing many concepts and scenarios before 3. Improve products by quickly testing many concepts and scenarios before making a final decision, giving you more time to think of new designs. 3 MAE 162D FEA Lab Winter 2011 [1] Thilo Trautwein, ACES Engineering
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MAE 162D FEA Lab Manual ± A detailed FEA Lab Tutorial is available on the courseweb: MAE 162E: Finite Element Analysis Lab Manual A. Aoyama, N. Ghoniem, R. S. Shaefer 4 MAE 162D FEA Lab Winter 2011
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MAE 162D FEA Lab Manual 5 MAE 162D FEA Lab Winter 2011
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FEA Calculation Sequence 3. Solve FEM and extract Results 1. Make a CAD Model 2. Break SM into small Elements Force What is the displacement ? The process of dividing the model into small pieces is called meshing . he ehavior of each element is well nown under possible support and load The behavior of each element is well known under possible support and load conditions. The finite element method uses elements with different shapes. 6 MAE 162D FEA Lab Winter 2011 p Elements share common points called nodes.
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Sequence of FEA Calculations: iven a meshed model with a defined material Given a meshed model with a defined material properties, displacement restraints and loads, the linear static analysis module proceeds as Mesh, material properties, follows: • The program constructs and solves a stem of ear simultaneous nite restraints, and loads system of linear simultaneous finite element equilibrium equations to calculate displacement components at ach node Displacements each node. • The program then uses the Strains displacement results to calculate strain components. resses • The program uses the strain results and the stress strain relationships to compute stress components. Stresses 7 MAE 162D FEA Lab Winter 2011
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Element Types Beam elements (1D) Shell elements (2D) lid elements (3D) Solid elements (3D) 8 MAE 162D FEA Lab Winter 2011
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Element Types olid lement Solid Element : For structural analyses using shells, the response of a node is described by three translations and three rotations. For structural analyses using tetrahedral elements, the response of a node is described by three translations. These are called degrees of freedom (DOFs).
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This note was uploaded on 08/09/2011 for the course MAE 162D taught by Professor Shaefer during the Winter '11 term at UCLA.

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Lecture_Intro - MAE MAE162D Lab ProductDesignUsing...

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