Bracing with ribs

1. Introduction

The ribs have stiffening effect. So the plates are supplied with differen ribs.

2. Model/Geometry

The first step is to create the model of the plate, which we can simply do in the Creo Parametric program. With this program was the fastest and easiest way to create the model.

imageThe finished geometry (Creo) and the meshed model (Gmsh):

Képernyőfelvétel (543).png

3. Materials and boundary conditions

3.1. Materials

The beam is made of steel, so we need to use the following data:

  • E = 210 GPa → 210e3 N/mm2

  • nu = 0.3

  • rho = 7800 kg/m3 → 7800e-9 kg/mm3

3.2. Boundary conditions

The plate is fixed with three screws (yellow → named „fixed”). The force is applied, where are the other three srews (green → named „load”).

Képernyőfelvétel (823).pngC:\Users\Bereczki\Documents\Feel++2\Dokumentálás_javított\Bordák_merevvé\bo.png

4. Results (Displacement and Von-Mises Criterions)

4.1. Without ribs

Maximum displacement: 0.6501 mm Maximum stress: 512.4 MPa

image5

image6

4.2. With ribs

Maximum displacement: 0.528 mm Maximum stress: 599.1 MPa

image7

image8

4.3. Summary

The deformation of the plate is smaller (-18%) with ribs.

The maximum stress bigger, but in the bend where the plate would break, there is smaller.