Quick Tip: Ansys Mechanical: How to Setup Bolt Pre-Tensioning Properly

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4 жыл бұрын

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Ansys Mechanical has a bolt pre-tensioning load condition that can be applied to various types of hardware. This video will cover how to setup a bolt pre-tension properly and how to avoid a common mistake by using a split face.
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Пікірлер: 21

@alexemanuel5809 4 жыл бұрын

Ohhhh, you´re amazing! you save my university project jaja. Greetings from Argentina! and thank you!!

@KETIVTechnologies 3 жыл бұрын

Happy to hear that!

@KanhaiPalash 4 жыл бұрын

Very useful tip. Thanks, mate.

@KETIVTechnologies 4 жыл бұрын

Glad you enjoyed this video! Make sure you subscribe for more content!

@pawemalek-podjaski8359 Жыл бұрын

Thanks!

@pedroalvanmillones3453 3 жыл бұрын

excellent video. What type of contact do you use between the components? Greetings from Peru

@kadriumar9992 4 жыл бұрын

It was really helpful

@KETIVTechnologies 3 жыл бұрын

Glad you found it helpful!

@nayandhanvij6041 2 жыл бұрын

sir could u please explain how u setup contact in this analysis

@MdubFrederson 6 ай бұрын

What about if the bolt is a revolute feature and the shank is made up of 2, coaxial surfaces?? Ansys will not allow you to pick those 2 surfaces to apply the pretension, which is extremely aggravating.

@docod9088 5 ай бұрын

Why I got more faces in threading place and got more mesh time how to avoid that

@TheJackandcody 3 жыл бұрын

What about for blind holes in assemblies? if I have a fully threaded bolt inserted into a blind hole connecting 2 parts, would the whole shaft of the bolt be the body i apply in pretension?

@johndao8592 3 жыл бұрын

Hello Jack, First question I have for you is what is important? Are you studying the failure of the threads? Or is this clamping a gasket you're studying? In other words, is the failure of the hardware itself important or what it is fastening? If you are interested in seeing if the hardware is going to fail, you're going to have to model the threads in and do a small scale analysis and I'll explain why. When a screw and threaded hole engage, the bottoming of the screw will cause the screw to deform and the bottom area will get wider. This will cause the last 2-3 threads to be the only threads truly engaging. If you are not interested in the hardware, I recommend just bonding the surfaces in the blind hole to the shaft. Sincerely, John Dao

@TheJackandcody 3 жыл бұрын

@@johndao8592 Hello John, Thank you for the reply and recommendation. Sorry i did not specify what I'm trying to simulate. The model is simply a table and its legs screwed in from the top. So in total i have 4 pretension bolts, in blind holes and im looking to see if the table and legs remained fastened together when subjected to a large load in the y direction. Around 100lbs for the load. I modeled the screws without any threads and separated the faces with their respective contact (leg and table). Thank you, Jack

@cylex96 4 жыл бұрын

What are your mesh settings for the bolts?

@johndao8592 4 жыл бұрын

Hello Cylex96, I usually try to insert a "method" and apply a "multizone" to get a a nice hex mesh. There are many meshing capabilities of Ansys, I hope to walk you through some in more tech-tip videos or our live AVA webinars. Please subscribe if you haven't! Sincerely, John Dao

@KETIVTechnologies 3 жыл бұрын

Thanks John!

@uladzimir8042 2 жыл бұрын

There is no sense to make bolts so long. You set all contacts as Bonded, and this is real issue. Keep in mind that Petension tool splits bolt's mesh on bolt centroid plane, and here it happens inside bonded contact surface area (looks like bonded contact between bolt and washer? =) ). Contacts must be bonded only bolt-nut (and maybe bolt-upper plate). All others are Frictional. No contact (or set Frictionless) must be along cylindrical face of bolt except bonded bolt-nut.

@GioLaRochelle993 3 жыл бұрын

Hi, and which contacts you user?

@KETIVTechnologies 3 жыл бұрын

Hello can you clarify the question please? KETIV | Nicole Morris

@GioLaRochelle993 3 жыл бұрын

@@KETIVTechnologies describe the contact used between the surfaces of interest. I mean between the nut and the washer. Between the washer and the plate ...