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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

SolidWorks and Catia on the same Playground… 3DExperience Platform

This has been a long time coming since, Dassault Systèms acquisition of SolidWorks in 1997. Back then there were discussions on how SolidWorks, Catia V5 and Enovia would work together.

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

Giving Arthritis The Finger: Part 1

Forward This is part 1 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

Unboxing Views in CAD

When working in any CAD environment, quickly and intuitively being able to manipulate views will improve efficiency. The basic premise is with the use of the number pad, shortcuts and if you want some scripting most CAD programs can be customized to speed up your workflow.

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

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.

Lacrosse Head Topology Optimization

Interview related to this work https://www.youtube.com/watch?v=vGeig6tIvyU&feature=youtu.be Introduction In this post I will go through the methodology to perform topology optimization with Catia (CAD), Abaqus (FEA) and Tosca (Topology Optimization). Topology optimization evolves the geometry to remove unneeded material effectively minimizing weight. This is carried out by automatically scaling individual element’s density and stiffness based on the stress state of the previous simulation. This is an iterative process where material flows to regions to satisfy constraints and minimize the objective function. The created geometry represents the maximum allowable geometry and would be a heavy stiff head. High stiffness is desirable however weight is not. This will be the basis for the objective function of the optimization. The basic workflow is to create CAD geometry with the maximum allowable footprint. Create a standard FEA simulation. Create a topology optimization setting goals and constraints. You can download the files created in this article freely below.