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Creo Parametric Tips

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Working with Homogenized Lattices

You probably know that Creo 6.0 became available recently. You can see an overview of what’s in the release here. Among the new capabilities, we’ve added homogenization for those simulating lattice structures. Arun Chavan from our development team offers this closer look at how homogenization works, why it matters, and the data behind the solution.     What Is Homogenization? Homogenization is a process of extracting effective material properties from a heterogeneous material and then viewing it as a continuum on the macroscopic level with the extracted properties ascribed to it.    Homogenization has many important and practical applications in material sciences, particularly where repeating lattice structures (and composites) are used.  That’s because computations of models with many lattices often prove difficult, time-consuming, and error prone. With homogenization, you have an effective approach for describing the overall behaviour of large lattice structures, without the complexity.   Improving Performance in Creo Say the number of cells in a structure exceeds 24,000. You may find it impractical to store or simulate full or simplified geometry models of that size in your system. These tasks simply require a too many computational resources. To facilitate the modelling of large lattice structures, Creo can now represent them as a continuous solid with material properties equivalent to those of the lattice structure.A solid with these effective material properties will have the same mass properties, stiffness, porosity, etc. as the original lattice structure.   Image: Creo 6.0.0.0 uses homogenization methods to facilitate the modelling of large lattice structures by computing and providing Creo Simulate the equivalent homogenized material properties. 1. Lattice structure; 2. Homogenous Continuum; 3. Process of Homogenization   What’s the Homogenization Procedure? Here’s more details about how it works: For a given lattice topology, we identify a unit cell. We apply Periodic Boundary Conditions on the unit cells and calculate overall effective material property. We then use these homogenized material properties for simulation.   Lattice Structures Then and Now In earlier Creo releases, to analyze lattice structures, the software would either create a full geometry lattice or simplified lattice. These both led to computationally intensive procedures, especially when the lattice region was large or included densely packed cells.   In Creo Parametric 6.0.0.0, the “homogenized” representation defines dense lattice structures without creating them in the model. An equivalent material property of the lattice region is extracted and used to get the equivalent mathematical model of material. In Creo Simulate, these equivalent homogenized material properties are then used to simulate the structure for linear static and modal response of a part. As a result, it takes less time to define a lattice, the model size is reduced, and simulation moves quicker.   The Data: How Do the Results Compare? We compared Creo 6.0.0.0 results for three lattice structures and all of them compared very well with baseline. The homogenization results converge when compared with full lattice geometry models. As you can see in the table below, the error declines with an increase in the number of lattices in a given volume.  
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cmcclintock
12-Amethyst
Apr 4, 2019

The Renaissance of CAD: What's New, What's Now & What You Can Do With It

Join us on April 23, at 10:00AM ET or 4:00PM ET for PTC’s Virtual Conference The Renaissance of CAD: What's New, What's Now & What You Can Do With It. You’ll stay ahead of the latest advances in product design such as:   Generative design Real-time simulation as a normal part of your job Design for additive manufacturing Easier collaboration with augmented reality Building smart connected products This virtual event includes expert presentations, demonstrations, and plenty of resources that you can use now to make your job easier.   Save your seat today!
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sbarbuto
5-Regular Member
Apr 3, 2019

See Creo Simulation Live, Real-Time FEA as You Design

At LiveWorx this year, we announced a partnership with ANSYS and a new technology never before available for parametric modeling: Live Simulation!   Creo Simulation Live will provide real-time simulation from within your 3D CAD modeler as you work. If you didn't get to see the live demo on the LiveWorx show floor (it was pretty crowded at times), we've got your front row seat in this short video. Watch:     To keep up with announcements about Creo Simulation Live and other CAD and PTC Mathcad news, sign up for the PTC Express Newsletter.           
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cmcclintock
12-Amethyst
Sep 13, 2018

Motors as Features - Edit References

One more example of what you can do with Motors now being feature. The attached video shows how to simply reroute the selected Motor to another Rotation Axis by clicking Edit References in the Mini Toolbar from either the Model Tree or the graphics area.  
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ArnaudVandeVeer
16-Pearl
Jun 16, 2016

Motors as Features - Unified dashboard

In Mechanism Motors are now features, which provides several advantages. One advantage is that the dashboard is unified and allows you to change the Driven Quantity in the Motor feature.   Check out the attached video for an example.  
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ArnaudVandeVeer
16-Pearl
Jun 16, 2016
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