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An Introduction to Static Analysis using OnScale Solve™

By Oliver Mashari 08 December 2020

Linear Static Analysis

Linear static analysis is simply an analysis with 2 main assumptions:

  1. The analysis is linear – The relationship between the load applied to an object and the response of the object is linear.
  2. The analysis is static – Analysis of approximate conditions in which the applied load does not vary based on time, ignoring the inertial and damping forces.

Linearity means a lot of things:

  • Small deformations
  • The loads and the constraints don’t change in value or direction
  • The material applied to the model is considered elastic

This implies:

  • That the relationship between loads and displacements is linear. This relationship is known as Hooke’s Law
  • Increasing the load by a certain factor will also increase the displacement by a factor that rises linearly

Swing arm static analysis example:

Motorbikes need a swing arm or swing arm to connect the rear wheel to the frame. Static loading is important in planning the main motorbike so that it can run safely. Swing Arm is the main structural part of a motorcycle chassis that serves to hold the rear wheels for driving and as a shock breaker support. The swing-arm is free to follow the road contours and vehicle loads as long as the motorbike moves. The aim of this walkthrough is to show you how to set up a static analysis in OnScale solve if you wish to follow along with this example download the attached STEP file here – swing_arm_2.step!

Import Geometry

Once you have logged in to OnScale Solve and created a new project let’s start by importing the geometry..

Click on the paperclip from the toolbar to import a 3D CAD file. Locate the swing_arm_2.step and begin the import process. After the import process is complete you will be prompted to select a length unit leave as the default (m).

Static Analysis

Materials

The modeler will no longer be empty, it will show the geometry and the materials assigned to the model.

Let’s assign structural steel to the model, click BRAS OSCILLANT MOTO2, the material panel will now be displayed in the UI. From the dropdown menu select Structural Steel.

Physics

Moving to the Physics section of the UI we will now look to apply the fixed and force boundary conditions (BCs) to the model.

First move back to the Modeler and expand BRAS OSCILLANT MOTO2 to view the list of faces, click Face 340. Next moving back to Physics, click on the spanner from the toolbar and select Force Load apply a force of 2900N. Repeat these steps and assign another force load of equal magnitude to the Face 191.

Click spanner from the toolbar and select Restraint assign to Face 373 and Face 496.

OnScale Solve

Simulator

Move to the Simulator section of the UI to begin the simulation process. The first step is to choose the mesh density. For this example we are going to choose a medium density mesh. Meshing is handled automatically in OnScale Solve and you can select from very coarse, coarse, medium, fine and very fine. Then click Mesh & Estimate and once complete click Run.

Results

Once the simulation is complete click Load Results. In the results panel click Displacement, you will be able to select the key performance indicator (KPI) from a dropdown menu. With Displacement selected you can choose from Magnitude, X, Y or Z. Let’s view Y displacement:

Static Analysis

That’s how to set up a very simple static analysis using OnScale Solve.

If you require any help you can post your problem on our forum or maybe the answer you are looking for is readily available in our documentation section.

Can’t find the answer you are looking for join our discord channel and join the discussion.

How to Get Started With OnScale Solve:

Engineers, designers, analysts, and current OnScale users can learn more about OnScale Solve and run their first cloud engineering simulation study by accessing these resources:

  • Create your Free private account here.
  • Watch a quick guided video tour of the software, from log in to simulation.
  • Run your first simulation by following a 10-minute online tutorial.
  • Ask for technical support by emailing support@onscale.com.