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FEA détaillé de la coque

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  2. FEA détaillé de la coque
  3. Poutres en plaques d'éléments finis – Commencer
  4. Didacticiel 1. Membre Shell FEA

Didacticiel 1. Membre Shell FEA

Dans cet exemple, we will demonstrate how to analyze a member made from a thin steel plate profile. The profile has the channel section with a plate thickness of 1.5 mm et une longueur de 1500 mm. Diaphragmes, avec une épaisseur de 20 mm, sont attachés aux deux extrémités du membre. Des conditions aux limites sont appliquées aux extrémités de la barre: le côté gauche est roulé tandis que l'extrémité opposée est épinglée. The material properties for the parts are defined with a yield strength (fy) de 355 MPa. The member is subject to an axial compressive force of 1000 kN.

To see this analysis in action and gain a better understanding, watch the quick video demonstration provided below:

The upcoming analysis will encompass both geometric and material nonlinearity. It also offers real-time tracking of the load-displacement curve, enabling an in-depth investigation of the member’s capacity while optimizing computational time. The results will provide insights into the member’s capacity, its deformed state, and its failure status.

Étape 1. Model Parts

Go to the ‘Main Partsmenu and select the ‘PROFILE’ languette. Input the edges for both the starting (je) and ending (j) sections. To input the sections’ géométrie, you can import a DXF file stored locally on your PC. The dxf file can be received from ici

Go to the ‘SCHEME’ languette. Set the member length to 1500 mm. Add diaphragms to the ends, selecting the ‘Polygon’ taper. The edges for the diaphragm are defined in a popup window that appears when you click on the ‘Diaphragm Edgescolumn cell. In the ‘DIAPHRAGM INPUT’, select the edges that form the diaphragm shape and input the thickness (.).

Étape 2. Maillage

Navigate to the ‘Meshing’ menu. Set the FE element size to 15 mm, then click the ‘Generate’ bouton. The color of mesh can by updated by the plate thickness (‘SETTINGS’ > ‘Mesh color by’)

Étape 3. Imperfections

Navigate to the ‘Imperfection’ menu. Set the settings, then click the Preview’ bouton.

Étape 4. Boundaries and Load

Navigate to the ‘Boundaries‘ > ‘Rigid Ends’ menu. Set the end boundary constrains. Navigate to the ‘Loads‘ > ‘Rigid Ends’ menu. Apply an axial load of 1000 kN to the left end of the member for compression.

Étape 5. Analysis and Load-Displacement tracking

Navigate to the ‘Analysis‘ menu. Select Nonlinear Explicit including geometry and material nonlinearity. Click ‘Perform Analysis’ button.

 

While the analysis is in progress, navigate to ‘Chart’ menu. Première, select a node to measure the Ux displacement (pas 1 et 2). ensuite, using frame selection, choose nodes from which to extract the Rx reaction forces (pas 3 et 4). Monitor the chart’s changes to identify the critical force (Pcr) that leads the structure to failure. Terminate the ongoing analysis once the failure state is detected.

Étape 6. Résultats

Navigate to the ‘Results’ menu, choose your preferred results options, and click ‘Displayto view the deformed state of the model.

 

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