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.
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
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
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.
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
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.
Being a perpetual early adopter of software updates we are already up and running Windows 10 on our server, laptops and even a Surface. The upgrades went without any issues and we have tested: Catia, Abaqus, Isight, Tosca and fe-safe with the DSLS (Dassault Systèms License Server) hosting the license files. One of our customers, Optimax Systems Inc has installed their DSLS on Windows 10 as well and provided their installation notes for DSLS and Abaqus. It’s great to have cool customers that are willing to help out!
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
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.
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.