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Elements: An Engineering Simulation Blog

Serving the engineering simulation community and ANSYS and Rocky DEM users by sharing news, workshops, seminars, training, webinars, tips & tricks, and more.
Aug
14

Electric Machine Design in ANSYS

As electric machines become smaller and faster, designers face the growing challenge of delivering machines that meet all the electrical, mechanical, and thermal design goals in a very limited timeframe.

Electric machine design in ANSYSElectric Machine AnalysesFor example, in the automotive industry, electrical machines commonly need to be:

  • Compact, given the limited space available
  • Lightweight and Efficient, with increased driving range and extended battery life
  • Quiet, for maximum passenger comfort

With multiple types of analyses required, designers need to seamlessly move from one analysis to another efficiently. And a problem that presents itself downstream may require that upstream analyses be revisited. For instance, if the thermal analysis reveals an overheating issue, then perhaps the upstream electrical analyses needs to be adjusted and the process started again. Furthermore, once an acceptable design is completed, the design may not yet be optimal. It just means that the design is in the ballpark.

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Aug
06

Modeling Mixing Tanks Using ANSYS CFD

In manufacturing settings, a mixing tank is often used to prepare materials for production. Large amounts of materials are put into an enormous tank in order to blend components together through refined mixing.

cfd simulation of mixing tank processCFD Simulation of Mixing Tank Process
Mixing tanks are an important piece of equipment in industries such as:

  • Water/Effluent Treatment
  • Pharma/Bio-Tech
  • Biofuels
  • Cosmetics
  • Oil & Petroleum
  • Mineral Processing
  • Flue Gas Desulpherization
  • Paints & Coatings
  • Adhesives & Sealants
  • Polymer & Plastics
  • Mining
  • Chemical Processing

The $64,000 question for the manufacturer: Do the quality and consistency of the final mixture meet the intended goals? If not, what needs to change? Obviously, the manufacturer can adjust the material inputs, the speed of the mixer, and other factors through trial and error. However, this approach provides information only on the inputs and outputs. If I add so much of product A and so much of product B, and mix at a certain speed for a certain time and at a certain temperature, then I get product C. This method doesn’t offer much information on the actual mixing process itself.

Computational Fluid Dynamic (CFD) simulation software can provide much more insight into the mixing process, showing the manufacturer a detailed picture of what is happening inside the tank and how the materials are reacting over time. For example, what if the mixing process could be shortened by 30 seconds? What kind of economic impact would that make?

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Jul
31

Stress Linearization in ANSYS Workbench compatible with ASME BPVC

Stress Linearization in ANSYS Workbench compatible with ASME BPVCStress linearization is a technique used to decompose a through-thickness elastic stress field into equivalent membrane, bending, and peak stresses for comparison with appropriate allowable limits.

  • Membrane stress is the average stress through the thickness (P/A)
  • Bending stress is the linearly varying stress through the thickness (Mc/I)
  • Peak stress is the total stress minus the membrane plus bending stress

Stress linearization was developed in the pressure vessel industry by Kroenke and Gordon in the 1970s. It was first implemented in Section III (nuclear vessels) and Section VIII, Division 2 (commercial vessels) of the ASME Boiler and Pressure Code. Although widely used in industry thereafter, specific guidance was not included in ASME Boiler & Pressure Vessel Code (BPVC) Section VIII Div. 2 until 2007.

While ANSYS Workbench can be used to validate designs, care must be taken in how the stresses and their locations are handled.

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Jul
24

Using ANSYS Mechanical to Calculate Fatigue Life

Ron Gagnon, Senior FEA Consulting Engineer, Fatigue & Fracture ExpertRon Gagnon
Sr FEA Consulting Engineer
Fatigue & Fracture Expert
Mechanical fatigue is a VERY popular topic with the ANSYS user community, with many engineers and designers attending our fatigue-related webinars over the past few years.

Luckily, all our fatigue-related webinars—as well as all recent webinars—are recorded and available anytime. Learn more about mechanical fatigue and how to use ANSYS and nCode DesignLife to solve fatigue models in these webinars:

Exploring Basic Fatigue Calculations In ANSYS® Workbench™
Thermo-Mechanical Fatigue (TMF) using ANSYS® nCode DesignLife™
Weld Fatigue Analysis

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Jul
02

SimuTech and ANSYS Help Solar Startup Tessolar Accelerate

Thanks to SimuTech and ANSYS, Inc.’s Startup Program, solar startup Tessolar is simulating its solar mounting systems more quickly and accurately—at a lower level of financial investment and with full support of SimuTech experts.

Yang Jin – Tessolar – Lead Product AnalystYang Jin
Tessolar
Lead Product Analyst
Tessolar is developing the world’s first structural composite solar module mounting system.The company’s engineers needed to reduce parts, lower costs, simplify installation while maintaining structural integrity, and understand the failure and load-bearing capabilities under various wind and snow conditions. They also needed to simulate materials property changes that may happen across 25 years of exposure to UV light, temperature, and moisture.

To help Tessolar solve their challenges, SimuTech led Yang Jin, Tessolar lead design analyst, to Discovery Live for Topology Optimization--something Jin didn’t realize was part of the Startup Program. “I gave her temporary access to SimuTrain where she could view our videos and tips and tricks. Yang also connected regularly with our engineers as she was getting more familiar with ANSYS FEA and Discovery Live. We also sent her timely info on relevant ANSYS webinars for Mechanical and Discovery Live updates,” says Steven Lee, SimuTech Business Development Manager.

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