Simulation for Absolute Beginners — Fusion 360 — And Your Comments & Questions— #LarsLive 61

and welcome to livestream number 61 today is spinning today hey hey sorry about that is Wednesday it is September 20th 2017 today / stream topic is simulation for absolutely beginners so if you're watching this year watching the recording then crichton got anybody in the last room yet as always down in the description area of the video you will find my email address large stuff cristiano ronaldo des comm if you have any topics you would like to see here on the live stream well that's your chance send me an email let me know what you would like to see and we will try to fit it in here anything with a fusion 360 trying to keep it you know 15 to 30 minutes long kind of you know kind of lose so definitely take the opportunity if you are interested also if you like this stuff I really appreciate you two thumbs up and if you don't be honest hit the thumbs down and if you haven't already really appreciate if you subscribe to the channel see we already got a bunch of people jumping in here it's absolutely awesome so today's topic simulation something I've been asked to do for a little while and today we're gonna do that now we're gonna dial it back and we're gonna start at the beginning and really kind of like trying to lay the foundation because I remember when I the first time was introduced to simulation within CAD software and man I mean I am not the brightest guy in the room and by PhD that never happened and I was really overwhelmed by you know who is fan neices and why does he get to be stressed so what I want to do today is I want to go in and kinda like give the fundamentals of the things inside a simulation because if you if you never been exposed to this kind of stuff and any of you guys who are great at this all your simulation ninja are out there love your feedback down the comment area of the video really appreciate you share the knowledge because this is kind of like a topic that it can seem overwhelming but I don't know if it really necessarily always have to you know it's a little bit like chess you can most people can play the game and then there's the guys who takes it like way and Beyond and the same thing with simulation so let's jump into fusion 360 let's talk a little bit about the basics of simulation the things that you really need to know to kind of like move on so enough talking I'll get back to the live stream a little bit later let me switch screens here okay so inside our fusion I model of something very basic and really just to show certain things in the air you may be seen kind of like this this type of example before because I think is probably the most basic but what are they buzz I'm off kind of like up just an l-shape or like a v-shape they have the same length I added a inside chamfer on here because when you do simulation you do you don't want any shop internal corners that connects give you some some bad readings and then I just added two cotton balls now the idea behind this kind of thing is we're gonna screw this thing into like the wall and then we are going to apply some load to the top here put some weight on top and and then kind of like get an idea about what what information we get out of the CAD system and I think that kind of starts a little bit there when it comes to to what a simulation because what all it does really if we really cut down to the bone is you have model something up in your care environment simulation gives you the option to go in and see how it really would do in real life or give you at least give you some feedback that maybe you know you can use on the computer screen instead of have to either do well most companies does one or two things either you over engineer it just make it big bulky and strong enough so you never have to worry about how much weight to put on it or two you actually create our prototypes and go out and test it in real life now you probably still if you do create prototypes today you probably still want to do that but instead of creating you know 30 different prototypes you can maybe now cut it down to five prototypes because you had the simulation software so what we're gonna do is we're gonna go into the simulation workspace and it lifts right in here now when you go in here you get presented with different simulation types and that again is important to understand why would I use the different ones now there's a very good description in this area and I definitely recommend that you check this out but we're gonna use today is something called static stress and static stress I think most cat software's has some kind of a light version of this but you need to know I think this is important that in fusion it is actually any the solve or the mathematics behind all this is actually a very high-end solver called Nass Tran that are that's owns that are stuff in this this is really X a high-end simulation within a very cheap can't software now static stress is probably the one is the best one to start out with if you if you're starting out it's it's the simplest one to kind of like get through and what it is we're applying a load to something now of course load can be presented in different ways I mean you could put a weight on this kind of shelf area or you could hit it with a baseball bat kind of two different ways to apply the load one is it's just steady you lifting up a weight the other one of course is like more impact based so there's different kind of like kind of studies for that now the static stress is really just like you're putting the weight up on it and it only really works with certain materials like steel if you're getting into a robber or and plastic and different things you want to maybe go more to a nonlinear so static stress net that'd be your kind of like entry into into simulation work space model frequencies um probably all tried maybe a computer fan starts humming or something in your car starts humming so this is kind of like frequencies can happen if you have something to rotates around your fan is out of balance or something like that thermal so now we can X figure out about how things reacts on the loads of heat what's gonna happen you know with the materials doing the heat and what would happen with heat and to the structural load so both adding heat and adding some kind of a structural load like weight or something structural buckling so I think the best example I have is that one time I went in my daughter's room and she was sitting reading a book on the bat and I decided to sit down on her little camping chair that was sitting next just like a little kids camping chair now it didn't break per se that's what static stress will show us they didn't snap it just buckled the legs literally just crumbled underneath me and of course everybody left that is structural buckling so think about that like something to steal it doesn't snap in half it just buckles it bends nonlinear is really really powerful so now the loads can be applied over a period kind of thing and you can use different materials in their events simulation is more about what would happen over time so we had like this little shelf here if we keeping on adding five hundred pounds on the shelf for the next ten years at one point will the material literally give up and and and and die so this is very good for companies to find out you know how many how many times can you go through a cycle before either kind of it kind of breaks down and the last one is shape optimization but we definitely got to play with this is where you applies some some weight what we like to call those let's do a structure and and then the software would like to find the strongest but lightest solution in there so I guess wrapping this up there is a lot of different types of simulation studies that you can you can do out there definitely go in here and read kind of like the different the different ones but of course that is important when you're trying to figure out um you know what simulation study you could or should run on your part because I really think I mean there's surely some things where you will never ever try to use simulation on but I think that if you really can I find a good group with this many people can use simulation to make them designs a little bit better alright so enough of this enough of kind of like the the overview I want to kind of give you the basis of a simulation study so at least you can you know feel a little bit about going in and trying to do one so I'm gonna select a static stress study here and like I said before we're really looking to mount this thing to the wall and we're gonna apply a weight to this part and then I think the thing that I struggle the most with in the beginning was finding out what the heck does all this mean like what is the data that I get back so we are starting I wish that I could say that we could just run straight across over here but it should look somewhat familiar in here you can create studies now by default when we click on the study we do get a a study in here you will see some of the things account like correlating so study materials materials material up here there is something this is contact that's contact up here low case load and so forth so there's some similarities and a lot of it works the same way as it does inside of of fusion itself now the first thing we're going to look at for this part here so this is just a single pot you can also do simulation on assemblies and we're gonna talk about that a little bit later and he's just gonna touch on it now over here a couple of one thing you need to know about is there is actually a little pre-check clipboard over here that will give you a green checkmark when you're ready to run a study to get some results but the whole idea about running these simulations are the hardest part about running these simulation studies is setting the part up for study and I'm gonna say the hardest part but it's just understanding kind of like the basics of it the first thing we need to know is what kind of material are we gonna run in here now when I click on this it comes up here with a steel and this s is the same as the model because when I create the model then diffusion defaults of steel so that's what I picked and we're gonna just leave it here for this example be aware of that inside of this one study we can create multiple different studies so we could test out different types of material again static studies are not great for plastic but you know you could try out different types of material you can actually even create your own type materials in here but you can see that the nan strand gives us all different kinds you know of things in it so you could try stainless steel versus cast iron or something like that so that's the first thing you want to make sure that you have the right material selected so we don't leave it a steel that that kind of makes sense now the other thing that is really important is something called a mesh now the power by the phone is not don't have a mesh on it what happens is that inside the simulation software it froze a mesh Oh think of it like a fishing nets around the model depending on how fine we make that fishing net the better our results gonna come back at us so if we make the fishing that very rough and you're gonna see the mass just in a second if we make it very rough you are gonna get less accurate results if you make it very fine we exa will if this study will take too long to run you just sit there computer cranking numbers that is not necessary that's kind of like that that you know balance between time and accuracy so I'm gonna go here and I'm gonna right-click on this one and we can go into and create some mess settings now in here you get different options that you need to be aware of now what I would recommend you start out with is like a model based size now the model based size you have like this bar you can drag up and down so let me just drag it all the way up to the max and just hit OK and I'm gonna right click again and say generate mess so now the software is gonna go in and throw this fishing net around the model and it's gonna give us kind of like a look at that fishing net so this is how it kind of like frozen on in here now a couple of things that you need to be aware of one thing is so you can kind of see if you're looking at just one of these triangles can like have a triangle here and you kind of have a triangle up here and like I said again time is money but you need to have some accurate results the finer that is the batter the better it is so the rule of thumb is that you should probably have at least four rectangles three to four rectangles in here for a side and that's because at each of these end points of the fishing triangle fishing that is where it's calculating the pressure so we can go back into our mass by right-clicking on the mass and going through mess settings and we can just drag this slider down just right in halfway and hit OK right click again and say generate mass and let's see what we get so now you will see that we are getting kind of like four rectangles per side and that is that is definitely more accurate now again so you can go in here and let me go back into the mess settings you're gonna you can play with the slider then finally you make it the longer it's gonna take to solve and also be aware there's all kinds of different settings in here you can do a lot of different things you could Excel to put in a size so if you apply a size you actually get any a number up here and I know that this here is a half an inch thick so if I went in here uh and I just said that I wanted to make it you know small or like that then it would actually solve it within that calculations just be aware of that the mass is important and of course again like this part here so now you can see we get fall rows and of course this here is a simple part if you had like certain area as their various complex you want to make sure in those areas you have a tight tight mess and if you're going here to the mess settings the model based size will actually kind of like regulate that so if there was a very small feature you will see that those are getting smaller so I will go with the model based and find the good messenger sitting there okay so that's important that you know that you have that mesh in there that fishing net this is it's actually not using the model itself to calculate this on is using that fishing net so that's why that is important next thing we're gonna talk about here is before we apply our load to the pot here we need to kind of like tie it down right now this pot is just kind of like floating around in space we need to tell the software which all the software we gave it to fishing net but now we need to kinda like tie it down in space so for that we're using something called constraints for that so in here there is some different types of constraints now I'm just gonna click on the constraint icon here and I was moving some things around this is how you look on your screen you'll see we have some different types of constraints so there's a fixed what if you if you've worked inside a fusion 360 maybe work with assemblies you know fixed means kind of like locked into place and pin so here it connects to spin around and axes freakness lasts what means that it is touching the surface but it can maybe you can maybe move against that surface and then there's something called pre describe displacement what actually means I think you can i push the when it's lockdown out in space somewhere now i'm gonna select fixed and then I'm gonna go in and I'm gonna imagine that we tying this thing I'm just gonna turn the master on off for a second hit the label I'm gonna go in here on the constraint for the fixed constraints and I'm gonna select the inside of my bolt holds then I'm gonna also select the top face here fall where we kinda like locking down this bowl so this is where it's fixed this is where the pots going to be hold on so the thing about behaving like these kind of socket head cap screw we're tying down really hard you know with all our might and false everything's hold into place so we're adding those constraints there so now the part is kind of like tied to the wall the next thing we're gonna do is we're gonna apply a load or the weights of this so I'm going to go in and I'm gonna apply the load now the load also comes in menus also comes in different types so there's a force that's what we're gonna use but as you can see there is different types of things in at any point you can go and click the little question mark and you will be taken out and get a much better kind of like description of things but we're gonna select the force here and I'm just gonna select on this top face and as soon as I do that we get a bunch of arrows kinda like indicating that this is where the force goes down now you should be familiar with some of these icons we can flip it around things like that and I'm gonna apply let's apply 800 pounds of pressure now for my European friends even from Australia wherever you guys all locate it you can change units right down here and so you can change change that for whatever you want so I'm going to hit OK to apply this pressure and when I've done that if you're looking back up on this clipboard you will see that we now have a green checkmark so that means we are ready to run the study to get some results back so one we brought in our model and we applied a mesh on it um and we were kinda like playing with a rule that we need more than just two triangles we need at least three or four after this fishing net around the model so that's number one we gotta do number two is we're gonna apply constrain how is this part actually kind of like help in place because if we just applied the load without constraining it the thing will just fall around the space so we first constrain it then wearing the load now we are ready to to run a study so I'm gonna go up here and I'm gonna press solve run a study solve it figuring out what the heck we are against I right-click on that and with Fusion you get a couple of different options you can either solve locally on your computer or you can use the cloud now if you use the cloud uh that means that you can actually have multiple studies you could have like created so we created them on here with 800 pounds pressure we're gonna create one with another study we're gonna show you in a second you could clone it or put a thousand two thousand and we could run all those studies up in the cloud while we were still working on our computer so that's kind one of the great things about the cloud now everybody when you get fusion you do get a set of cloud credits but when you get to a certain I'm not and a certain amount that's a frequently asked question thing up here when you get to a certain amount you can buy more cloud credits and by the way if your study fails it will not charge your cloud credits I'm just gonna run this locally for why not it's a small study and I was gonna click sold here and then I can kind of like sit back pour myself a scotch if it after 5 o'clock Oh me and bring your wall right now and this is just gonna take you know two seconds to M so kind of run through this here and that's it now it just ran the study now it comes back with some feedback and this feedback you're seeing on the screen here this is the stuff that confused me a little bit when I started using simulation software like okay I can follow the other staff set up the masks constraints put the load on great and then when you get the result back you're like well what does it all mean so that's what we're gonna talk about right now it comes up with something called safety factor and it gives us a little warning here it says is one point four five and it says that the sign is right at all it might be sufficient but outside the fact that it could cause a bend or break the Nexus says a typical design application minimum safety factor of three is common so what does that mean you'll actually look if you're looking over here to the left you get this little graph and it actually shows like green is 3 to 6 6 to 8 is blue and 1 - this is red so what it means is that right now it's holding on to the 800 pounds we placed on top it hasn't but it's called yield it hasn't broken but normally you want to have a safety factor that is like double or triple in here to make sure that things will not break and and that has to do with first of all the calculation software inside of the soft in the software but also of course your steel has you know sometimes you buy piece of steel it has something in it so so that is important so right now it tells us that this material is not safe it's not great so we know when you probably need to look at some some other things in here now I'm gonna click this drop down and I'm gonna show you two other things in here that is important one is called stress and one is called displacement so this is the three things that I want you to know about so safety a factor safety factor like I said means that the part if it's over 1 it hasn't broken but normally you want to make sure that it's at least 2 to 3 times stronger than the minimum stress and this is is in all different kinds of formats it can be called first principle Authority I don't know this is where your PhD comes in von Mises stress is just a measurement but I like to use it for is just to going and see where is my part where is the stress factor on this part and what you can do is you will see red means that there is an issue blue means it's kind of fine and you can actually grab right down here see my cursor changes and if I drag you would access it likes to show some dragging up where the stress seemed to occur on our model and this is of course I mean thinking about it it's probably pretty obvious right I mean that's where we we have the screws in here right that's why they're clamping in to the wall I guess that's where there's a lot of stress so if this actually breaks we break in here could be could be a good indication besides the stress displacement now displacement means pretty much when we added this 800 pounds on the part how much would it really move now if you're looking at the screen here it looks pretty crazy but if you're looking at the readout it would move nine thousandths of an inch so this is just kind of like we're over exaggerated now one of the nice things is that you can exit we can go and we can kind of like and then mate this result so if I click up here on the animate and I track the play button this one oh where you will see that a kinda like place it play through are we are adding this 800 pounds now all right you can it's pretty like you can go two ways and I will just go up and down like that so we can kind of like see it is what I normally say the simulation is pretty colors you can make it a little bit you see how it's kind of like very choppy let's go up to 40 and then it should be a little bit most smooth you can Excel to speed it up if you want to so this kind of like show says what now of course like a sense it's exaggerated there's only moving nine thousand so this is way exaggerated but here's an interesting thing I'm just noticing here I'm gonna go to the front and you and that is if I'm looking while this is playing well that's actually kind of like an issue here because you see how the pot is kind of like pushing behind I mean that's kind of like a wall there right and the whole thing is kind of being pushed down well that's my fault because when I applied those constraints that holding down the part I only specified that the screw holes where it was logged down so this is extremely important to to realize when it comes to simulation studies that if you're getting real results or wrong results many times it's the setup that could be an issue we never defined that walls we actually saying it's just screw it in and we're just letting it kind of like bend behind that so let's fix that now I'm gonna go out and hit OK here and then we can actually just go in here if you go into our load case you will see how constraint is sitting in here and then we can just add another constraint to it so what I'm gonna use for this back side is I'm gonna use the freakness less so it's pretty much it's not locked in it can actually move almost like if the it was sitting on roller bearings so it gets a flat surface like the wall so I'm gonna add that on top of that and hit OK and as soon as I do that we get flags because this is like when we inside of CAM it's telling us that hey you know you change something and now we can just go in and resolve it again with kind of like that that new condition in there so be aware of that when you're setting up your style you gotta specify everything of kind of like where it's moving and and and you know take a good look at it so when you go and look at the results used animation is not just for you know pretty picture now something interesting happens here though and that is that now our safety factor actually bumped up to six because it now have that sturdiness of the wall right so and I'm gonna run a little more than a half an hour today so by setting up the right conditions suddenly our part is actually not failing what is good news is meeting six we can go down here and we can say that we want to look at the safety factor in the plot here you will now see that it goes to 6 what is perfect right is not really over to signed but it's good now if we go back and look at the stress again we again can go in and we can scroll here and now we can see the de-stress have kind of changed a little bit actually now suddenly because we have a wall behind there it's not under screws it's actually on this radius or and up in this area so we are kind of applying that pressure up there but I guess actually makes sense now what we're thinking about it and if we go back down and look at the displacement we will see that because again we had the supporting wall now we actually only moving to thousands of an ends and again if I go up and play it it will still look kind of dramatic but we will see them when we go and look at the front of the side here everything is now completely completely stable so that's all good and we kind of like got a good result and you know open the bottle of champagne or beer or whatever you are into but one of the great things about being inside of simulation and what I want to kind of want you to think about is that we can kind of redefine this and be like well what else what could actually be be considered so one of the things I did in this part was I added that load on top on the pot here but what if that load I applied that load to the entire face but if that load is actually not on that entire face what if it's shifted down a little bit so what we can do is we can go and we can right-click and we can actually clone this study so we already have this result we're kind of happy with this we can go to the boss and say that you know if you're applying this load on the entire surface everything looks good so let's clone this study but gives us in study number two and let's go in and change this load here this this load that we that we created so I'm just gonna go into this load and actually I gotta go into the folder then go here this it's going to edit this load here so you can see how it is on the entire surface well one thing we can actually do we can we can apply different constraints to this so if I click on this angle Delta I actually get this triad I could actually say that the load would come maybe an angle in there and what I also can do if I click on this little target I can actually control that 800 pounds how it's gonna come down to the surface and it does it with a radius so right now the 800 pounds would come down all on that surface so now any guy know the whole thing about a lady with high heels stepping on your toes right versus a big flat sandal so I'm gonna make this a little bit smaller and then I'm just gonna grab it here and I'm gonna move the load out what if the load was pushed right now here instead what will happen that that's hit okay and with that out there let's resolve a study here and see what we get out of that so I hope that this kind of makes sense how you can utilize the simulations to kind of see these different things so again I'm repetition is key in all learning you got to set up that mesh you got to set up the right constraints and like you saw how I was missing the back wall so that's important then you got to apply the right load and now you just saw how we can X and move it around and then you get to to run the study so now moving this out we suddenly get a flag that our safety factor is actually been compromised we're under the three and we have a warning about that because the load was shifted out if we're going to look at the stress we probably will see able to think that the stress is going to be somewhat the same right rolling up here if we go and look at the displacement of it it had moved it to about 5,000 here and again use these animation tools to get a really really good idea that shows kind of like here where the load is okay so just to make sure when it comes to reading the different scenarios safety factor between two and three is where you want to be the yield the steel will break and one so you want to double it up I don't care who fen mises is but when it comes to stress it's showing you where in the part you maybe could could do something right like looking here it makes sense and that the radius is where where this is breaking and I I wish I could have done a little bit of faster but I actually did design a model and I'm gonna finish this out I'm gonna wrap this up now but what happens if we adding that cross beam in there right like we all know that kind of design so now we can actually go find out if you know what what we want to do with the design in here and then the last one the displacement really just shows you how much the part is going to move but like I said this the animation can really give you a good indication of that the last thing I want to end this up with is that if you do go out through your data panel and you go up to your main library here if you scroll down you will see that there is simulation samples you can go in here and in here there's some hands-on exercises some equity verification there's all different kinds of things in here that you can you can play around if you check out the website that I showed yesterday with a learning content that is actually a six minute video showing how to set this connection rod up but I actually think that we maybe next week gonna attack that model or something similar to this model so we can talk about assemblies because you we just did a single part today but of course you can do assemblies I hope that this was a good introduction into simulation you let me know thumbs up a thumbs down I really just hope to kind of like if you never touched this before at least feeling like you know you kind of understanding the basics of this and if anything simplify is important so if you right now have an assembly file where you want to do something some simulation on it break it down into the single components that you are going to do a simulation on also remove anything that doesn't need to be there so if there's like some pockets or some different things that have nothing to do what you're testing don't need it it's gonna take longer to solve what I mean by that is that if we go in and we look at our simulation model here maybe if that well I don't know maybe if there had been a talking down here it maybe would have not affected anything we could just have left left that out all right guys 87 people in the livestream thank you so much for taking the time out of your busy day to to join in and watch this I hope it was useful you let me know down in description area there is my email address if you watching the recording in YouTube it should be up there in about 15 minutes or so shoot me an email let me know what you think any future topics I love to hear about it tomorrow this is important tomorrow we're gonna model how about getting into fusions just model something up um I think we got a model up a computer fan and I think we're gonna do it you know as a beginner let's not make it too complicated let's just see how we can model something up without using way too many fancy commands and overwhelm people Friday is cam remember that so tomorrow model up a computer fan or at least the fan blades themselves I'm gonna do what I normally do in the broadcast if you're watching the recording really appreciate it thank you so much taking the time if you're watching the live stream I'll see you just in a second in in the chat have an awesome awesome day thank you so much guys

Channel: Lars Christensen

Views: 117,672

Keywords: Autodesk, Autodesk Fusion 360, Fusion 360, CAD, 3D, 3D Printing, CAM, CNC, Beginner, Lars Christensen, #LarsLive, Tutorial, akn_include, Simulation, Testing

Id: bZnHQTPP-Ps

Length: 41min 16sec (2476 seconds)

Published: Wed Sep 20 2017