Durability and failure investigations of products are of high interest to determine the risk of failure in engineering applications. Traditionally fracture mechanics is based on stress intensity factors and J-Integral. However, they are strictly valid under limited applications (for ex., monotonic loading, elastic materials etc.) The needs for fracture for nonlinear materials is sought by several of our customers. Electronics packaging, solders, tires, composites are typical examples. With this in mind, we introduced a novel approach in ANSYS 15.0, viz., Material force. You will find a clear description of the approach in a whitepaper that is available on our website. Continue reading
ANSYS 16.0 has some really sweet features for our structural mechanics users. Check out the video below as we use a HexaKopter model from Molly-Shop.De to showcase some key enhancements. Continue reading
Many FEA applications can benefit from the ability to strategically modify a mesh during solution, in order to simulate challenging geometry distortions which otherwise cannot be solved. Unlike manual rezoning, mesh nonlinear adaptivity is completely automatic, requiring no user input during solution.
Regarding high performance computing (HPC), there are numerous improvements introduced into ANSYS Mechanical APDL16.0. However, I would like to focus this post on a feature that demonstrates the technological leadership of our company. ANSYS Mechanical APDL 15.0 was the first commercial FEA software product to support the Intel® Xeon Phi™ coprocessor. In ANSYS Mechanical APDL 16.0, we extend support for Xeon Phi hardware to virtually all users. The Xeon Phi coprocessors can now be used on either Linux or Windows, as well as with shared-memory parallel (SMP) and distributed-memory parallel (DMP). Continue reading
In a previous post, I have presented how to apply a harmonic base excitation in ANSYS Mechanical 15.0 using three different techniques. Among those techniques, we had the great ACT extension that has received a great attention due to its ease of use and practicality.
ANSYS 16.0 offers the capability of applying a harmonic base excitation natively, and without the need for the ACT. Acceleration applied as a base excitation uses the Enforced Motion Method. Continue reading
I recently had the chance to visit a customer building, among other products, special cranes and lifting equipment — typical fabricated structures mostly made of welded plates and tubes. As I walked through their facility, the size of the equipment struck me: very thick metal plates, massive tubes to support heavy loads — I’m not a tall guy but I felt even smaller walking by such huge structures! And, as we discussed the simulation of such models, I realized the FEA models were using what we call “thin” elements, in other words beams and shells — a bit of a paradox. Continue reading
The peristaltic pump has become popular across various applications since being patented in the U.S. more than 120 years ago, and technological advances continue to make it relevant. The pump alternates compression and relaxation in its hoses and tubes, drawing fluid in and out. Our throat and intestines are actually good examples of peristaltic pumps.
I recently studied peristaltic pumps with computer analysis to see if I could improve the design through simulation. Where was the starting point? As a multiphysics program, ANSYS’ software suite provided a complete solution to the simulation of a peristaltic pump and I used software ranging from ANSYS Mechanical and ANSYS Fluent to ANSYS Explicit Dynamics Each tool has its unique capabilities and solved the problem at hand from different perspectives. Continue reading
From a structural reliability point of view, it is very important to understand and accurately characterize the material behavior when designing or analyzing an engineering application.
In this respect, ANSYS Mechanical software provides a vast library of material models that can help users simulate various kinds of behaviors such as elasticity, plasticity, creep and hyperelasticity, just to name a few.
Although these models can be used to investigate the mechanical response of a large number of different materials such as metals, rubbers, biological tissues and special alloys, users may wish to incorporate their own material laws into ANSYS. Continue reading
Some time ago, I wrote a couple of posts describing the performance of ANSYS Mechanical APDL on several different tablet computers. Previously, I had studied two separate tablets: one from Fujitsu, which was more of a shrunken laptop with an Intel® Core i5 processor and a second from Dell, which had an Intel® Atom™ processor and was more in line with the look and feel of an iPad. The Fujitsu tablet was clearly faster, but bulkier and pricier. The Dell tablet was lighter, smaller, cheaper, and also less powerful. Continue reading
The pressure is on to reduce fuel burn for gas turbines of all types. The need is particularly acute for aircraft engines, in that fuel is a large component of operating costs of an airline, so much so that even the volatility in its price can mean the difference between profit and loss. So when airlines demand more fuel efficient aircraft, much of that requirement is passed along to the engine manufacturers. While reducing gas turbine fuel burn is a primary driver, carbon emissions are related, so reducing the fuel burn “kills two birds with one stone”. Continue reading