Understanding Contact Reaction Probes in ANSYS Mechanical

contact reaction probesThere are three methods available for extracting the reaction forces across a contact region in WB-Mechanical:

  1. Contact(Underlying Element)
  2. Contact (Contact Element)
  3. Target (Underlying Element)

When you choose ‘Contact(Underlying Element)’, the code is selecting the contact elements associated with that region, selecting nodes attached to the selected contact,  and then selecting elements attached to the selected nodes before calculating the reaction.

Below is an equivalent APDL command script, where “cid1″ is a parameterized contact element type number for the region of interest. Continue reading

Combining APDL with ANSYS Workbench for Structural Simulations

best of both worldsSometime ago, I wrote an article entitled Best of Both Worlds: Combining APDL with ANSYS Workbench for Structural Simulations. When I read this article today, I think of three things:

  1. We have made a lot of progress in our latest releases so the use of MAPDL is reduced or irrelevant for the most common tasks we perform. With our added options, loads, or boundary conditions, models can easily be accessed by everyone without commands.
  2. The content of the paper is still relevant, as many of you have created and validated APDL scripts over the years that you can reuse “as is” in the Mechanical application.
  3. And last but not least, you can now give all of your scripts a Workbench flavor by integrating them in the Mechanical application through buttons, menus and new items in the simulation tree.

Continue reading

Analysis of Large Assemblies Using Superelements in ANSYS Workbench

The 2011 earthquake and Tsunami in Japan led to severe loss of many structures and equipment. Can engineering simulations make us better prepared for such natural calamities?

Most organizations analyze the different components with great details for various failure conditions. But, seldom do they do a complete system analysis due to enormous computational requirements. With robust system level design the complex/large equipment could have survived the earthquake better.

Even with ever increasing computational power, solving larger FE models remains a challenge. Analyzing the complete system, like vibration analysis of a full-vehicle or full data-center-rack remains out of scope due to their enormous model sizes. At ANSYS, we focus at all levels of engineering analyses and help our customers achieve robust system level design. Continue reading

“Bring Your Child to Work Day” at ANSYS

This year, my two sons David (8) and Michael (7) had the day off school on the same day as our “Bring Your Child to Work Day” at ANSYS so I brought them in to the Ann Arbor office for the morning. As it turned out, I was the only one to bring in any kids that day — although there were organized events at the larger offices — so I decided I would just let them play with our software in the training room.

Neither boy had used SpaceClaim or ANSYS Mechanical before so I started by giving them some step-by-step guidance, but I rarely touched the mouse after the first 5 minutes. They each used their imagination and made multiple models. David’s first model started looking like a top hat, so he tried to make something reasonably reminiscent of the head of Uncle Sam.

His second model was more of an abstract solid that used a lot of push/pull fillets, which are easy to create and adjust in SpaceClaim. It looked very interesting under load. He was creating the fillets one at a time at first, but then really got going when I showed him how to hold down CTRL for multiple edge select. Continue reading

The Physics of Split-Second Events: Explicit Dynamics

What happens when a bird runs into a plane while the plane is soaring through the air? How do you identify exactly what happened in that split second? And since every action has a reaction, how do you determine if the plane is designed to survive a bird strike? Understanding the physics of split-second events: This is the arena of explicit dynamics analysis.

Now consider split-second impacts in golf. United States Golf Association specifications regulate the speed limit with which a golf ball leaves the face of a driver. Using a standard of approximately 109 mph clubhead speed, approved golf balls leave the face of the driver at about 180 mph on average. If you’re charged with designing balls and clubs, how do you get to the optimal design that meets specs?

Animation courtesy Advanced International Multitech Co., Ltd. Continue reading

ANSYS Webinars, Seminars and Events This Week

Learn ImageWe have seven ANSYS webinars for you to take advantage of this week where you can further your skills in your ANSYS software. Begin the week by gaining insight into the ANSYS Fluent Adjoint Solver, a groundbreaking new technology that ANSYS fluids customers are already beginning to take advantage of to help them improve their products quicker. Explore ANSYS Workbench, which provides a number of standard tools for structural mechanics simulations, or Ask The Expert about tips & tricks for modeling reacting flows.

And, if you’re on the road this week at DesignCon in Santa Clara, CA, stop by Booth 513 and say hello!

Jan 29 The ANSYS Fluent Adjoint Solver: Getting More From Your CFD Webinar
Jan 29 Customization of Process for Structural Mechanics Webinar
Jan 29  -
Jan 30
DesignCon 2013 Santa Clara, CA Trade Show
Jan 30 Ask the Expert – Modeling Reacting Flows with ANSYS CFD Webinar
Jan 30 Ask the Expert – Tips & Tricks to Improve Modeling Efficiency & Productivity in ANSYS Icepak Webinar
Jan 30 Ask the Expert – Tools for Efficiently Managing ANSYS Mechanical 14.5 Models Webinar
Jan 31 The ANSYS Fluent Adjoint Solver: Getting More From Your CFD Webinar
Jan 31 Customization of Process for Structural Mechanics Webinar

ANSYS Webinars Full Description & Registration Below

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Offering a New Paradigm Shift in CAE?

What works for manufacturing companies also applies to engineering simulation software providers. In a competitive climate, we all must aim continually for innovation, listen to the voice of our customers, anticipate swiftly changing needs, identify buyer expectations and make appropriate changes. I strongly believe that the parametric licensing and capabilities newly introduced with ANSYS 14.5 are truly innovative, standing out from the rest. They could become a paradigm shift in CAE, as they will make extensive design exploration and robust design a reality.

Given the market forces for increased product performance and integrity, engineering simulation undoubtedly can help manufacturers to evaluate more design ideas and reach the “best” design, one  that works across a range of operating conditions. For that matter, many engineering simulation software providers today do offer design exploration and optimization tools. But despite the need, the adoption of these tools is relatively small. Our product manager for ANSYS DesignXplorer, Simon Pereira, regularly investigates the obstacles to further adoption, and, in each of his reports, the biggest hurdles appear to be unacceptable turnaround times, shortcomings in usability and lack of available licenses. Continue reading

ANSYS ICEM CFD Interactive

image of ICEM CFD batch controls in ANSYS Meshing

ICEM CFD interactive/batch controls can be found in the advanced options of several different methods in ANSYS Meshing.

ANSYS Meshing is the general purpose meshing tool found in the ANSYS Workbench environment. It includes a lot of powerful ICEM and TGrid meshing technology, but exposed in a simplified and automated way. For instance, MultiZone in ANSYS Meshing is based on ICEM CFD hexa technology, but without the learning curve associated with blocking, edge distributions, etc.

However, there are some occasions when advanced users want to take more direct and interactive control over their meshing. ANSYS Meshing allows advanced users to “pop the hood” on some mesh methods with the “ICEM CFD Interactive” options (TGrid interactive is also available as a Beta option). ICEM CFD interactive allows users to launch ICEM CFD with all its controls. You can do full hexa blocking, tetra/prism, shell meshing, diagnostics, automatic or interactive mesh editing, etc. You can start from just the geometry, transferred to ICEM CFD with meshing parameters, or you can actually start with the mesh and adjust it from there. For instance, you could generate an PI tetra mesh in ANSYS Meshing using “Interactive” with “Post Operation” and then use the extended ICEM CFD tools to replace the mesh with a smooth delaunay fill or 12 Tetra to 1 Hexa conversion, smooth, and then return to ANSYS Meshing. Continue reading