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CAD Geek Summer School Tour is back this year!!!

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We are doing a “13-City Tour” in the following cities:

  • Muskegon, MI
  • Kalamazoo, MI
  • Madison Heights/Detroit, MI
  • Jacksonville, FL
  • Orlando, FL
  • Fort Lauderdale, FL
  • Tampa, FL
  • Sarasota, FL
  • Addison, IL
  • Toledo, OH
  • Dayton, OH
  • Columbus, OH
  • Strongsville, OH

Receive a FREE CAD Geek Summer School T-shirt when you attend your event, and be automatically entered into a drawing to win an iPad!

12 Noon – 1:15 pm – Registration • Lunch • Overview

1:15 – 2:15 pm – Simulate Your Ideas

Contain costs while maintaining a sound design! Run dynamic simulation inside Autodesk Inventor then use the results for Finite Element Analysis. Discover even more functionality with Autodesk Simulation to generate fatigue analysis.

2:30 – 3:00 pm – Autodesk Inventor Drawing Template Creation

Get the most out of your 3D data with templates that work! Gain a better understanding of the resources that go into automating a documentation engine.

3:00 – 3:30 pm – Autodesk Inventor Fusion 2012
(It’s not just a preview anymore!)

Leverage 3D data from any source! Learn how you can edit and maintain non-native imported data as well as enable non-engineering team members to collaborate on your 3D data.

3:45 – 4:45 pm – Visualization

Empower marketing and sell more. Discover how to generate compelling images, from basic visualization to stunning animation with Autodesk Inventor, Autodesk Showcase and 3DS Max.

Registration Link:

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Inventor – Dynamic Simulation Example

Companies can use dynamic simulation features of Autodesk Inventor software to understand how a product will work under real-world conditions without having to build costly, time-consuming physical prototypes or waiting for results from expensive consultants.

Simply input driving loads, friction characteristics, and dynamic components, then run the simulation to validate the design.  Select on the link below to view the example I have put together.

Video Link:
Inventor – Dynamic Simulation Example

Inventor Tube and Pipe – Rigid Tube Basics

Using the tube and pipe functionality inside the Autodesk Inventor product is easy with a lot of great benefits like:

  • Standardizing Machine Plumbing ensuring your machines are piped the same way every time no matter who the installer is.
  • Understand cost associated to plumbing of your machines
  • Accurate bill of materials
  • Detail drawings of standard pipe runs
  • Detail drawings of pipe segments

Let’s take a look at this basic example:
Inventor Tube and Pipe – Rigid Tube Basics

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Inventor FEA – Force Load vs. Bearing Load?

So you are running an FEA analysis in Inventor, and you need to apply a load to a cylindrical face. Do you use a regular “Force Load” or a “Bearing Load”? The answer really depends on how the force should be distributed on the face in question. A bearing load will apply the load in a parabolic distribution, while the force load will be an even distribution.


OK, lets take a look at a couple of loading scenarios and the results that each provides. I have used the shock tube from one of the Inventor sample files as an example.

In the first analysis I used a Force Load. Notice that the stress is not centered on the cylindrical face, but rather along its edges as if the cylinder was being stretched.

In the second analysis I used a bearing load. Note that the highest stress is focused on the center of the cylinder. This is much more realistic in a case where a bearing or shaft is acting radially on the cylindrical face.

Contributed by Ben of the CAD Geeks

FEA Convergence – Ensuring accurate simulation results in Inventor

One of the foreign concepts to many people new to FEA is the idea of “Convergence”. Convergence is an analytical method that many analysts use to determine the quality of their FEA results. Since FEA uses small elements to solve complex problems, a larger number of smaller elements can sometimes yield more accurate results. But how small is small enough when it comes to element sizes? This is where convergence comes into play. Convergence in Inventor Simulation is actually a series of settings that can be used to automatically make mesh elements smaller, and help determine if results are accurate.
The basic concept is that the mesh will automatically be made of smaller elements and solved until the results of the refined mesh fall within a percentage of the previous mesh. In other words: The smaller mesh is no longer significantly changing the results, and it making it smaller would yield diminishing returns.
In the image below, convergence settings were used to determine the validity of the FEA results. Before using convergence, the stress in the model was calculated to be 5.85 ksi. After turning on convergence (which refines the mesh and makes it smaller), the stress was calculated to be 6.205ksi with only .448% defiation from the previous iteration. This shows us that we can trust our FEA setup and gives us more confidence in our solution.
Contributed by Ben of the Tata Technologies CAD Geeks
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