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Hello all, We have situation where we using pressurized air to force a large steel piston down a cylinder in order to generate an impact. There is no rod attached to the piston, so the static load is completely supported by whatever seal/ring arrangement we have on it. The following are the...

Sorry for the delay, and thanks for the suggestions thus far. The anvil and piston that this will tested on are both 4" dia and 4" long. We will however be using this data to validate approaches at a larger 12" dia x 12" long version. Any significant cracking is considered a failure, and yes...

I'm looking for a material recommendation for what we think is a rather extreme design. We are firing a steel piston into a steel anvil with an impact speed of 50m/s. Current attempts have resulted in material failure. We need a steel that can withstand this impact over a low cycle range. Right...

Sorry, I did mean B! Thanks again for all the advice!

Thanks for the advice guys! My girlfriend and I have been together for almost 9 years (high school sweethearts you could say...) so no worries on the 'commitment' side. City B is another major city, and there will definitely be other jobs to be found. SWComposites, you are definitely right that...

There are a few similar posts floating around but I desperately need some advice on my situation from some more experienced engineers. I need to choose between 2 jobs (we’ll call them ‘A’ and ‘B’), and the choice is killing me. Some background on myself: Graduated 2 years ago with a degree in...

Thanks to all who posted advice. My thinking has been more related to maintaining a good relationship with my current boss rather than worrying about ethics towards the company. As many have said, they/he would let me go without prior notification if they were force to by their management...

For reasons that probably deserve a thread of their own, I've decided it's time to leave my current employer. I had an interview a few weeks ago, and decided it was best to take the entire day off (using vacation time) to avoid going in with the negativity and frustration I often feel when...

I believe hydtools has properly answered the question. Your main problem is the following statement: "The Reaction to any force is generally (to our general perception or natural instinct) equal to the force or a fraction of the force if the force is acting at an angle to the support ( the sine...

This is most likely a ridiculously simple question and I'm somewhat embarassed to ask it, but it's my first time performing such a calculation so cut me some slack... I've been asked to select a linear actuator that will act on a 'beam' which is pinned on one end. The actuator pushes about...

Thanks for taking the time to respond again and prepare the example, Priam. Ofcourse I understand that two symmetrical holes on the same vertical plane relative to the downward applied force can't have an axial component (Fx=-2.35 is due to the mesh being slightly asymmetric). My point was that...

So sorry, I worded things wrong (or didn't explain at all...)! The forces/moments I gave are not the overall reaction sum of the system but the nodal forces applied on the nodes of only ONE of the holes, all summed about the hole center. The opposing hole as an equal and opposite shear reaction...

Thanks for the response! Let me remove the focus from prying forces and instead focus on the accuracy of the axial/shear forces I'm extracting. I'll explain my concern using an example: An angle bracket is modeled using 2d shell elements. The shorter arm of the angle is 3" in height and bolted...

Hi all, I've recently begun a new job doing stress analysis using ANSYS. I'm new to ANSYS and relatively new to the industry (a little over a year out of school). I have some questions regarding simulating bolted connections in ANSYS. We are analyzing rather large structures composed of...