Coupling Piezoelectric and Fluid Simulations

ink jet nozzle

Ink jet nozzle

Piezoelectric devices surround us in our everyday life. Our cars and trucks contain many piezoelectric devices, including fuel level sensors, air bag deployment sensors, parking sensors and piezoelectric generators in the wheels to power the tire pressure monitoring system. Your smartphones or tablet contains piezoelectric sensors that detect the motion and orientation of the device, which my kids were using to good effect to play “Need For Speed” yesterday. Many of us have ink jet printers at home, which can use piezoelectric printer heads to eject thousands of drops per second. Continue reading

Electromagnetics – Structural Harmonics Coupling

Electric motors and generators produce vibrations and noise associated with many physical mechanisms. It’s always been of great interest to look at the vibrations and noise produced by the transient electromagnetic forces on the stator of a permanent magnet motor. Thanks to our products that made is possible through a direct coupling between ANSYS Maxwell and ANSYS Mechanical. The process of this coupling is to first carry out an electromagnetic simulation to calculate the forces per tooth segment of the stator. The harmonic orders of the electromagnetic forces are then calculated using Fourier analysis, and forces are mapped to the mechanical harmonic analysis of the second stage. As you might expect, a simulation environment — ANSYS Workbench— is used to integrate a seamless workflow. Continue reading

Exposing Complex APDL Scripts in a User-Friendly Way

People often approach me saying: “I’m convinced of the benefits of simulation, but we don’t have any experts in our company to run the powerful software” or “I would like to deploy simulation from my few CAE experts to a larger fraction of my engineering force, but they don’t have the necessary skills to run ANSYS and it’s difficult to hire new staff”. Software customization can definitely help in both situations. Our answer to this is the Application Customization Toolkit (ACT).

You may recall a previous blog from me about Combining APDL with ANSYS Workbench for Structural Simulations. Here’s another great example of how the Application Customization Toolkit (ACT) can help you exposing your existing APDL scripts in ANSYS Mechanical. Continue reading

What’s New with Contact Technology in ANSYS 15.0?

contact technology ansys 15Contact technology is used extensively throughout ANSYS Mechanical and Mechanical APDL to enforce compatible behavior between different portions within a model. With each Release, ANSYS continues to improve the breadth and robustness of our contact technology.  In ANSYS 15.0, we have enhanced contact still further to help users build models more efficiently without compromising on robustness.

Trim Contact, first introduced in ANSYS 14.5, is a great tool for reducing the number of unnecessary contact and target elements in large assemblies. In ANSYS 15.0, we have changed the default to activate trim contact even for application involving large deflection.

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ACT Templates for ANSYS DesignXplorer

Application Customization Templates - ACT

Are you familiar with ANSYS ACT (Application Customization Templates)? ACT allows all sorts of great customization. You could use ACT to encapsulate APDL scripts, add new loads and boundary conditions, create custom results, or even integrate third party tools. For instance, Vanderplaats R&D  just integrated their topology optimization product into ANSYS Mechancial via ACT.

The ACT Toolkit requires a license to develop extensions, but not to use extensions created by others or provided in our ACT library. Continue reading

Team Nemesis Preparations for BAJA SAE India 2014 – Guest Blog

image of Akshay Pandhare

GUEST BLOGGER: Akshay Pandhare is a team captain of Nemesis racing for BAJA SAE India 2014 event. He is in the final year of mechanical engineering at COEP, Pune.

Team Nemesis Racing is a division of COEP Motorsports that has, for the past eight years, participated in the SAE BAJA Competitions held at various national and international levels. We conceptualise, design and build our all-terrain vehicles (ATVs) which undergo rigorous tests and inspections during the competition which include endurance racing. We are the proud winners of BAJA India (Overall) and South Africa (Endurance & cost report) in 2013.

The important aspect we look for in designing all our vehicles is the major stresses and strains the components undergo under the rigorous racing conditions and how to counter them and optimise the design ensuring maximum strength and safety with minimum weight. This is made possible by ANSYS’ unmatched simulation environment and superior physics engine. Continue reading

Terrafugia: Developing a Flying Car – Engineering Challenges and Best Practices

Editor’s note: A special thank you to the Terrafugia Engineering Team for compiling today’s blog post.

From conceptual design to manufacturing, we use simulation tools such as ANSYS® Mechanical™ and ANSYS Composite Prep-Post™ to significantly reduce development time and costs. Our senior engineers, Mark Corriere and Nicholas Tucker, have been leading the analysis and simulation charge on the Terrafugia Transition® and have used this iterative process to increase confidence in the physical structure.

Image of Terrafugia Transition

Terrafugia Transition – example of a frontal load case analysis

This is a highly visible topic that we’ve found a lot of people are interested in learning more about, so we’ve teamed up with ANSYS for a webinar at 1pm ET, this Thursday, March 6th, to discuss the technical challenges and design process of developing the Terrafugia Transition®, the premier flying car. The Transition® addresses the limitations of typical general aviation aircraft by extending the multi-purpose flexibility of its driving capability. Continue reading

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