Reverse-Engineering

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CAD and Simulation Peripherals

What gear do I use in my home office for CAD and simulation is commonly asked of me. Because of this I have created this post so that you can see and have links to what I'm currently using. In some cases I show what I would buy today because of upgrades or because my

Excessive Engineering: Fidget Spinner

Simulation is Child's Play, Broken Toys Aren't This is my presentation from CAASE20: The Conference on Advanced Analysis & Simulation in Engineering. This is my favorite simulation conference because it's solver agnostic. You can meet analysts outside of your particular software silo. Alas, this year it's virtual, however, as a plus side I have the

3DExperience SALE!

I rarely post anything 'salsey', so, this is going to be short and sweet. Due to the pandemic there is a huge sale on the 3DExperience platform. 50% off for the first quarter and 25% off for the second. It ends June 30th! The 3DExperience is perfect for remote working since the platform handles the

Giving Arthritis The Finger: Part 3

Forward This is part 3 of a multi-part series which goes through the custom joint replacement to a finger due to rheumatoid arthritis. Part 1 Scan data to CAD Part 2 CAD to FEA Part 3 FEA to Fatigue Durability Analysis (fe-safe/Rubber) The two silicone variants reported in Leslie et al (2008) are compared to

Dental X-Ray to Bite Simulation

Designing a medical device commonly starts with the healthy or diseased anatomy. Geometry without significant simplifications typically comes from various 3D scanning technologies such as CT or MRI. Here we will go through turning scanned point cloud data into usable NURBS CAD geometry with Catia. FOR FREE ACCESS THE FILES CREATED FOR THIS POST PLEASE CLICK HERE

Process Streamlining: Catia Custom Toolbar

During an interview I was once asked “You’re a mechanical engineer why did you get into programming?” My response was “I’m lazy and repetitive tasks are boring!” Some repetitive tasks do not lend them selves to automation, however, they are still boring and error prone as your mind wanders. This post details how creating a custom toolbar in Catia that can alleviate some of this tedium. These methods can be extrapolated to just about anything. For example I have a specific toolbox that I use when working on: mountain, road or now kids bikes.

Analyzing Data from a 3D CT Scan of a Part with CATIA

While 3D printing has been widely embraced as a means of speeding up the product development process X-Ray 3D scanning has been somewhat less utilized, despite its tremendous usefulness. Part of the reason for this may be that while a 3D print can be held and touched the data files from CT scans are enormous

Femur CT Scan to Finite Element Analysis

Introduction The purpose of this post is to explain how to utilize medical imaging data in the development of a prosthetic implant. The two most common medical imaging technologies are CT and MRI. Both export a stack of 2D grey scale images over a 3D domain in the standard Digital Imaging and Communications in Medicine (DICOM) format. In this post I will go through the development of geometric (CAD) and mechanical (FEA) models based off anatomical imaging data. Through this workflow designs can be tuned for specific biometry based on realistic loading scenarios. As always all of the models used to develop this post are available at the end of the article.