Updates and Enhancements in ANSYS Mechanical 19.2 – Webinar

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All Things ANSYS 020 – Modeling Flow & Heat Transfer with Flownex

 

Published on: September 10th, 2018
With: Eric Miller, Luke Davidson, Vincent Britz, and Farai Hetze
Description: In this episode your host and Co-Founder of PADT, Eric Miller is joined by Luke Davidson and Vincent Britz of M-Tech, and Farai Hetze from CFX-Berlin, for an interview on the what Flownex is, it’s capabilities for modeling flow and heat transfer, and how it works with ANSYS products. All that, followed by an update on news and events in the respective worlds of ANSYS and PADT.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

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Eigenvalue Buckling and Post-buckling Analysis in ANSYS Mechanical

As often happens, I learned something new from one of my latest tech support cases. I’ll start with the basics and then get to what I learned. The question in this case was, “Can I use the mode shape as a starting position for an Eigenvalue Buckling?” My first thought was, “Sure, why not,” with the idea being that the load factor would be lower if the geometry was already perturbed in that shape. Boy was I wrong.

Let’s start with the basic procedure for Eigenvalue buckling and a post-buckling analysis in ANSYS. You start with a Static Structural analysis, in this case, a simple thin column, fixed at the bottom with a 10 lbf downward force on top. Then you drag an Eigenvalue Buckling system for the toolbox, and place it on the Solution cell of the Static Structural system. After setting the number of buckling modes to search for, ANSYS calculates the Load Multiplier for each mode. If you applied the real load in the Static Structural system, then the Load Multiplier is the factor of safety with that load. If you put a dummy load, like 10lbf, then the total load that will cause buckling is F*Load Factor (l).

For post-buckling analysis, ANSYS 17.0 or later lets you take the mode shape from a linear Eigenvalue Buckling analysis and feed it to another Static Structural analysis Model cell as the initial geometry. We use to have to do this with the UPCOORD command in MAPDL. Now you just drag the Solution cell of the Eigenvalue Buckling analysis on to the Model cell of a stand-alone Static Structural system. Also connect the Engineering Data cells.

The key is to look at the Properties window of the Solution cell of the buckling analysis. In the above picture, that is cell B6. (Right-click and hit Properties if needed.) This lets you choose the mode shape and the scaling factor for the new shape going into the structural analysis. Generally it will be Mode 1.

You can then apply the same BCs in the second structural analysis, but make the force be the buckling load of F*Load Factor (l), where F is your load applied in the buckling analysis. Make sure that Large Deflection is turned on in the second structural analysis. This will give you the deflection caused by the load just as buckling sets in. Increasing the load after that will cause the post-buckling deflections.

 

In this case, F is 10 lb, and load factor for the first mode (l) is 23.871, so the load at load step 1 is 238.71 lb, and load step 2 is 300 lb. You can see how there is very little deflection, even of the perturbed shape, up to the buckling load at load step 1. After that, the deflection takes off.

So what did I learn from this? Well there were two things.

First, doing another Eigen Value Buckling analysis with the perturbed shape, if perturbed in buckling mode shape 1, returns the same answers. Even though the shape is perturbed, as the post-buckling structural analysis shows, nothing really happens until you get to that first buckling load, which is already for mode 1. If the model is perturbed just slightly, then you have guaranteed that it will buckle to one side versus the other, but it will still buckle at the same load, and shape, for mode 1. If you increase the scale factor of the perturbed shape, then eventually the buckling analysis starts to get higher results, because the buckling shape is now finding a different mode than the original.

The second thing that I learned, or that I should have remembered from my structures and dynamics classes, a few <cough>23<cough> years ago, was that buckling mode shapes are different than dynamic mode shapes from a modal analysis with the same boundary conditions. As shown in this GIF, the Modal mode shape is a bit flatter than the buckling mode shape.

After making sure that my perturbed distances were the same, the scale factor on the modal analysis was quite a bit smaller, 2.97e-7 compared to .0001 for the Eigenvalue scale factor. With the top of the column perturbed the same amount, the results of the three Eigenvalue Buckling systems are compiled below.

So, now you know that there is no need to do a second Eigenvalue buckling, and hopefully I have at least shown you that it is much easier to do your post-buckling analysis in ANSYS Workbench than it used to be. Now I just have to get back to writing that procrastination article. Have a great day!

Don’t compromise your composite tooling design – Streamline your Sacrificial tooling with FDM

FDM Sacrificial Tooling: Using Additive Manufacturing for Sacrificial Composite Tool Production

Additive manufacturing has seen an explosion of material options in recent years. With these new material options comes significant improvements in mechanical properties and the potential for new applications that extend well beyond prototyping; one such application being sacrificial tooling.

Traditional composite manufacturing techniques work well to produce basic shapes with constant cross sections. However, complex composite parts with hollow interiors present unique manufacturing challenges. However, with FDM sacrificial tooling, no design compromise is necessary.

Download the white paper to discover how FDM sacrificial tooling can dramatically streamline the production process for complicated composite parts with hollow interiors.

This document includes insight into:

  • Building for optimal results
  • Consolidating composites
  • Finding application best fits

Design, Simulate, Print: ANSYS Offerings in Additive Manufacturing – Webinar

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All Things ANSYS 019 – Using Simulation for consumer goods – An interview with MTD Products

 

Published on: August 27th, 2018
With: Eric Miller, Maryam Khorshidi, and Dominic Kedelty
Description: In this episode your host and Co-Founder of PADT, Eric Miller is joined by Maryam Khorshidi and Dominic Kedelty from MTD Products, for an interview regarding how they use ANSYS simulation to engineer consumer goods such as lawnmowers and leafblowers; followed by an update on news and events in the respective worlds of ANSYS and PADT.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

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Pictures and Impressions from the 2018 Colorado Additive Manufacturing Day

Someone in the business of giving advice on social situation once said that you need four ingredients for an event to be a success: great conversation with the right people at the right location with the right food and beverage.  All of that came together last week in Littleton Colorado for PADT’s third annual Colorado Additive Manufacturing Data. The weather cooperated and we were able to gather under a tent at the St Patrick’s Brewing Company right on the Platte River to spend the afternoon talking about 3D Printing.

PADT’s very own Norm Stucker hosted, kicking off the event with a welcome from Littleton’s Mayor, Debbie Brinkman.  This was followed by presentations:

  • PADT’s Co-Owner Rey Chu shared his thoughts on being successful with AM
  • Scott Sevcik, VP of Manufacturing Solutions at Stratasys went over the Stratasys Product Roadmap
  • I gave a high-level overview on Design for Additive Manufacturing
  • The ANSYS Additive Manufacturing simulation tools were reviewed by PADT engineer Doug Oatis

After a break, that involved getting more pints of beer, eating an amazingly large amount of pizza, and networking; we returned to the tent for our keynote addresses and a panel.

The first Keynote was from William Carver of Sierra Nevada Corporation (SNC) on how they are using AM for their Dream Chaser spacecraft.  This was followed by Ryan Bocook taking a look at Boom Supersonic‘s use of the technology for the development of their brand new supersonic airplane. For many of us, seeing how these two companies make 3D Printing a part of their design, test, and manufacturing processes was very informative. It was real world, real issues, and real solutions.

The day was capped by a fascinating panel on that very topic: Making Additive Manufacturing Real.  The speakers consisted of:

The panel was moderated by Maj. General Jay Lindell (USAF, Ret) who serves as the Aerospace and Defense Industry Champion for the Colorado Office of Economic Development and International Trade.  Not only does he have the longest and coolest title, he did a great job of getting the panel to share their experiences to the benefit of all who were there.

For me, the best part (the Dark Lager does not count) of the event was the interaction between users across industries.  So many great examples and stories.  Bad nerd jokes were told, advice was shared, stories about challenges were told, and business cards were exchanged. We live in an online world and you can have some community through the internet. But to build great relationships and to truly share knowledge, you need to get everyone together under a huge tent on a sunny day at a brewery by a river.

If you want to take part in our next Colorado Additive Manufacturing day, a 3D Printing user event in Arizona, Utah, or New Mexico, any of our online webinars, or any other PADT event make sure you sign up for the PADT Additive & Advanced Manufacturing Email List or the PADT General Information Email List on our OptIn page. If you have any questions about any of the content or 3D Printing in general, do not hesitate to contact us.

Please enjoy the pictures we captured of the day below and we hope to see you at our next event.

 

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PADT & Nimbix FAQ

You asked, and we answered. Below find a list of answers to commonly asked questions regarding the capabilities of Nimbix and it’s applications for ANSYS simulation software.

If you have additional questions you can email us at info@padtinc.com, or view a recording of our recent webinar on the benefit of using Nimbix when it comes to running simulation on the cloud:

Nimbix FAQ

  • Does NIMBIX comply with NIST 800-171/800-53 requirements
    1. NIMBIX is currently working on NIST compliance as we speak and are hoping to complete this very soon
  • What is the maximum core count?
    1. Customers using NIMBIX has access to thousands of cores. There are customers using 500 cores, 1000 cores and even more.
  • Does Nimbix provide any details of solving performance or hardware performance after a solution?
    1. What’s great about Nimbix is that you have complete access to the typical ANSYS performance/hardware outputs that all the solvers provide. In addition NIMBIX provides access to time/cost for the machines themselves
  • Any try before you buy arrangement to try it out?
    1. Please contact us at info@padtinc.com if you have any questions or if you’d like to see Nimbix in more details
  • My companies QA program requires verification of software installation. Can Nimbix run the workbench/ANSYS test suite?
    1. Nimbix is able to run a variety of benchmarks to validate and verify ANSYS
  • Maybe just a general question…any idea which solvers use GPUs?
    1. The Mechanical solver utilizes GPU extensively. In addition one of the Fluent solvers and an HFSS solver can utilize a GPU
  • The cost is of course important…how can you get the startup cost easily?
    1. Nimbix shows list prices on the website for a variety of machines. In addition Nimbix does not charge any subscription fees, gives each user 500GB free and does not charge file upload/download fees.  Please email us for any further clarifications
  • Is the license fee the typical fee for a standalone/network license?
    1. In terms of licensing, a customer’s own licenses are always used to run ANSYS. Nimbix can either host some or all of your licenses on their license server. OR Nimbix can access your own license server through a tunnel VPN.
  • Can you provide more insight on the monetary cost of running a computational intensive simulation, like very high-velocity object impact using ANSYS/Autodyn on Nimbix (large run time, large file storage)?
    1. As always, costs will vary depending on the type of problem. Please email us at info@padtinc.com if you want exact details on costs
  • How is session cost calculated?
    1. Session costs are purely based on time that you hold a machine. Time is calculated to the second
  • Suppose I’m limited not on cores in the office, but on licenses. If all the Mechanicals/Solvers/PrepPosts are occupied by the rest of the team, can I still use your service?
    1. Licenses need to be provided by the customer, either through their own license server or by hosting partial licenses on Nimbix’s own license server
  • How is ANSYS licensing handled?
    1. In terms of licensing, a customer’s own licenses are always used to run ANSYS. Nimbix can either host some or all of your licenses on their license server. OR Nimbix can access your own license server through a tunnel VPN.
  • How does Nimbix proving compare to purchasing HPC units upfront for an internal system with 16 to 32 cores? I know usage profile would matter, but this could be easily charted?
    1. Usage would definitely dictate a comparison. If there any specific use cases you’d like to investigate please reach out to us at info@padtinc.com
  • ANSYS/Autodyn is available on the Nimbix HPC platform?
    1. Yes it is
  • Is there a minimum charge?
    1. There is no minimum charge.

Best practices for composite tooling with additive manufacturing

Additively Manufactured: Best Practices for Composite Tooling with 3D Printing

The advanced composites industry has a continual need for innovative tooling solutions. Conventional tooling is typically heavy, costly and time-consuming to produce. New applications, product improvements and the demand for faster, lower-cost tool creation challenge composite product manufacturers to innovate and remain competitive.

The use of additive manufacturing (or “3D printing”), and specifically FDM, for composite tooling has demonstrated considerable cost and lead time reductions while providing numerous other advantages such as immense design freedom and rapid iteration, nearly regardless of part complexity.

Download the white paper to learn more about the various advantages and capabilities of composite tooling with additive over traditional manufacturing methods, and discover the best practices for ensuring that your composite tooling process is efficient as possible.

This document includes best practices for:

  • Testing and characterization
  • Tool Design, Production, & Use
  • Analyzing results

Press Release: NASA Awards a $127,000 STTR Research Grant to PADT and ASU for Advanced Research in 3D Printing

For as long as PADT has been involved in Additive Manufacturing, we have been interested in how the process of building geometry one layer at a time could be used to more closely represent how nature creates objects.  Nature is able to create strong, lightweight, and flexible structures that can not be created using traditional ways of manufacturing like machining, molding, or forming.  3D Printing gives engineers and researchers the ability to explore the same shapes that nature creates.

As you can imagine, strong and light structures are very beneficial for objects that need to be launched into space.  That is why NASA just awarded PADT and Arizona State University, a Phase 1 STTR grant to explore how to make just this type of geometry.  We are excited to work with ASU to define what the possibilities are in this first phase and then apply for a Phase 2 grant to bring real-world applications of this technology to industry.

This is PADT’s 14th SBIR/STTR and our second joint project with Dr. Dhruv Bhate at ASU.  Many of you may remember the research and process improvements that Dhruv worked on when he was a PADT employee.  We look forward to sharing our results with the Additive Manufacturing community and moving this exciting application for the technology forward.

Please find the official press release on this new partnership below and here in PDF and HTML

If you have any questions about high-performance computing for simulation, either with local hardware or compute resources in the cloud, reach out to info@padtinc.com or call 480.813.4884.

Press Release:

NASA Awards a $127,000 STTR Research Grant to PADT and ASU
for Advanced Research in 3D Printing

The Grant Represents the Strength of 3D Printing in Arizona Exemplified by the Strong Cooperation Between Industry and Academia

TEMPE, Ariz., August 14, 2018 ─ To further advance their longstanding cooperation, PADT and Arizona State University (ASU) were awarded a $127,000 Small Business Technology Transfer (STTR) Phase I grant from NASA. The purpose of the grant is to accelerate biomimicry research, the study of 3D printing objects that resemble strong and light structures found in nature such as honeycombs or bamboo. The research is critically important to major sectors in Arizona such as aerospace because it enables strong and incredibly light parts for use in the development of air and space crafts.

“We’re honored to continue advanced research on biomimicry with our good friends and partners at ASU,” said Rey Chu, principal and co-founder, PADT. “With our combined expertise in 3D printing and computer modeling, we feel that our research will provide a breakthrough in the way that we design objects for NASA, and our broad range of product manufacturing clients.”

PADT recently partnered with Lockheed Martin and Stratasys to help NASA develop more than 100 3D printed parts for its manned-spaceflight to Mars, the Orion Mission. This grant is another example of how PADT is supporting NASA efforts to use 3D printing in spacecraft development. Specific NASA applications of the research include the design and manufacturing of high-performance materials for use in heat exchanges, lightweight structures and space debris resistant skins. If the first phase is successful, the partners will be eligible for a second, larger grant from NASA.

“New technologies in imaging and manufacturing, including 3D printing, are opening possibilities for mimicking biological structures in a way that has been unprecedented in human history,” said Dhruv Bhate, associate professor, Arizona State University. “Our ability to build resilient structures while significantly reducing the weight will benefit product designers and manufacturers who leverage the technology.”

“PADT has been an excellent partner to ASU and its students as we explore the innovative nature of 3D printing,” said Ann McKenna, school director and professor, Ira A. Fulton Schools of Engineering, Arizona State University. “Between the STTR grant and partnering to open our state-of-the-art Additive Manufacturing Center, we’re proud of what we have been able to accomplish in this community together.”

This grant is PADT’s 14th STTR/SBIR award.

To learn more about PADT and its 3D printing services, please visit www.padtinc.com.

About Phoenix Analysis and Design Technologies

Phoenix Analysis and Design Technologies, Inc. (PADT) is an engineering product and services company that focuses on helping customers who develop physical products by providing Numerical Simulation, Product Development, and 3D Printing solutions. PADT’s worldwide reputation for technical excellence and experienced staff is based on its proven record of building long-term win-win partnerships with vendors and customers. Since its establishment in 1994, companies have relied on PADT because “We Make Innovation Work.” With over 80 employees, PADT services customers from its headquarters at the Arizona State University Research Park in Tempe, Arizona, and from offices in Torrance, California, Littleton, Colorado, Albuquerque, New Mexico, Austin, Texas, and Murray, Utah, as well as through staff members located around the country. More information on PADT can be found at www.PADTINC.com.

# # #

Media Contact
Alec Robertson
TechTHiNQ on behalf of PADT
585-281-6399
alec.robertson@techthinq.com
PADT Contact
Eric Miller
PADT, Inc.
Principal & Co-Owner
480.813.4884
eric.miller@padtinc.com

 

All Things ANSYS 018 – Exploring the ANSYS Academic Program

 

Published on: August 13th, 2018
With: Eric Miller & Gilles Eggenspieler
Description: In this episode your host and Co-Founder of PADT, Eric Miller is joined by Gilles Eggenspieler, Worldwide Academic Program Sales Operations Director at ANSYS, Inc. for a deep dive into what the program is all about, including how to take advantage of its offerings, and some examples of members of the program who have seen significant success in their use of ANSYS simulation tools.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

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Elevate Your Post Processing & Visualization Quality with ANSYS EnSight – Webinar

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Register Here

If this is your first time registering for one of our Bright Talk webinars, simply click the link and fill out the attached form. We promise that the information you provide will only be shared with those promoting the event (PADT).

You will only have to do this once! For all future webinars, you can simply click the link, add the reminder to your calendar and you’re good to go!

PADT Featured on local news show, talking about 3D Printing

We have a fantastic visit this morning from Cory McCloskey from KSAZ Fox10, one of our local TV Stations.

They gave us a chance to show off our new Carbon On-Demand Manufacturing technology, some of the printing with do with Stratasys Objet technology for medical applications, and even spoke to our interns Garrett and Austin about the work they are doing with NASA.

If the embedded video doesn’t work, you can view the two segments their website:

http://www.fox10phoenix.com/morning-show/351998877-video

It is always great when we can show off any bit of what we do here at PADT.

Using ANSYS HPC or ANSYS HPC Pack Licenses in ANSYS Electronics Desktop (Maxwell or HFSS)

Taking advantage of HPC can dramatically speed up solutions for electronics simulations.  Depending on whether you have ANSYS HPC licenses or ANSYS HPC Pack licenses, a different setting needs to be made in the HPC options, as shown here.

In Electronics Desktop, we click Tools > Options > HPC and Analysis Options:

For ANSYS HPC licenses, we set the option to “Pool”.

For ANSYS HPC Pack licenses, we set the option to “Pack”.

With ANSYS HPC licenses, each license task enables an additional core for solving.  At release 19, 4 cores are enabled with standard licensing, so adding 8 ANSYS HPC tasks enables solving on 12 cores.  With HPC Pack licenses, the first task enables an additional 8 cores, while a second task enables 8×4 or an additional 32 cores, etc.  For more information, see the ANSYS documentation on HPC licensing.

Discover the benefits of using additive manufacturing for composites

Introduction to Additive Manufacturing for Composites

Additive manufacturing encompasses methods of fabrication that build objects through the successive addition of material, as opposed to subtractive methods such as CNC machining, that remove material until a final shape is achieved. Composite fabrication is one of the most original forms of additive manufacturing.

Whether the process involves wet lay-up, hand lay-up of prepreg materials, or automated fiber placement (AFP), methods of composite manufacture are distinctly additive in nature, building up to final part forms typically one layer at a time. However, the nature of additive manufacturing has been revolutionized with the advent of the 3D printing industry.

Strong, resilient, fiber-reinforced thermoplastics. Lightweight, low-cost composite tooling. Explore these and other characteristics and benefits of additively manufactured composites in the e-book “Introduction to Additive Manufacturing for Composites.”

This e-book covers:

  • Current applications for composite fabrications
  • Comparison of printed and conventional tooling
  • Characteristics of printed mold tooling