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Learn Finite Element Analysis
Ирландия
Добавлен 3 окт 2020
Hello, I am Dr. Bryan J. Mac Donald, author of the book "Practical Stress Analysis with Finite Elements". This channel is all about helping you to learn Finite Element Analysis. We will have videos on the theory of finite element analysis and also practical videos showing how to do a finite element analysis using popular software products such as ANSYS and ANSYS Workbench.
If you would like to buy a copy of my book then please go here: www.amazon.com/dp/1908689404/
If you would like to buy a copy of my book then please go here: www.amazon.com/dp/1908689404/
FEA101 What is Finite Element Analysis?
You can get a copy of the book here: www.amazon.com/dp/1908689404/
This video is the first in a short series introducing Finite Element Analysis to people who are new to this area. In this video we discuss how Finite Element Analysis (FEA) is the application of the Finite Element Method (FEM) to the solution of problems in engineering and the sciences.
We go on to describe exactly how the finite element method works by considering a relatively simple problem. We describe all the relevant terms in detail and explain exactly what they mean.
This video is a summary of the information available in the book. For a more detailed description please go ahead a buy a copy of the book:
Amazon: www.amaz...
This video is the first in a short series introducing Finite Element Analysis to people who are new to this area. In this video we discuss how Finite Element Analysis (FEA) is the application of the Finite Element Method (FEM) to the solution of problems in engineering and the sciences.
We go on to describe exactly how the finite element method works by considering a relatively simple problem. We describe all the relevant terms in detail and explain exactly what they mean.
This video is a summary of the information available in the book. For a more detailed description please go ahead a buy a copy of the book:
Amazon: www.amaz...
Просмотров: 466
Видео
Workbench Tips #1: User Defined Results - Hydrostatic Stress
Просмотров 6 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/dp/1908689404 This video shows you how to setup user defined results in ANSYS workbench. Some results are not accessible through the workbench GUI (graphical user interface) but can be obtained via a user defined result. It is actually quite a simple process to define these. In other cases, we may want to display a result that it is not suppor...
Meshing 2D Elements in ANSYS Workbench - Linear and Quadratic - Triangles and Quadrilaterals
Просмотров 7 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/dp/1908689404 This video is a tutorial on how to control the mesh when meshing 2D elements in ANSYS workbench. We describe how to change between linear and quadratic elements, how to change between triangular and quadrilateral elements and how to force workbench to make the type of mesh that you want. We also cover how specify the number of el...
Plane Strain Forging Simulation of a Block using ANSYS Workbench
Просмотров 6 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/dp/1908689404 This video is a tutorial on how to perform a 2D plane strain finite element analysis of squeeze forging of a rectangular cross section block using ANSYS Workbench. We start off by describing the problem as detailed in the book "practical stress analysis with finite elements" and we obtain an analytical solution using plane strain...
Axisymmetric Analysis Using ANSYS Workbench
Просмотров 25 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/dp/1908689404/ This video is a tutorial on how to perform an axisymmetric finite element analysis of stepped shaft using ANSYS workbench. We start off by describing the problem and obtaining an analytical solution using simple stress theory and stress concentration factors. We then build the 2D geometry and assign it axisymmetric properties. W...
2D Plate with a Hole using ANSYS Workbench
Просмотров 20 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/dp/1908689404/ This video is a tutorial on how to perform a finite element analysis of a plate with a hole using ANSYS Workbench and 2D plane stress elements. We start off by describing the problem and obtaining an analytical solution using simple stress theory and stress concentration factors. We then perform two separate analyses: first an a...
Bicycle Frame with Beam Elements ANSYS Workbench
Просмотров 14 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/Practical-Stress-Analysis-Finite-Elements/dp/1908689404/ This video is a tutorial on how to perform an analysis of a bicycle frame in ANSYS workbench using beam elements. The tutorial is based on Case Study B from pages 355 to 363 of the book "Practical Stress Analysis with Finite Elements" by Dr. Bryan J. Mac Donald. In this tutorial we show ...
1D Truss Analysis with ANSYS Workbench
Просмотров 2,3 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/Practical-Stress-Analysis-Finite-Elements/dp/1908689404/ This 1D Truss analysis is based on example 1.1 from pages 16 to 22 of the third edition of "Practical Stress Analysis with Finite Elements" by Bryan J. Mac Donald. In this tutorial we show how to build, mesh and solve a truss model using ANSYS Workbench and how to generate and interpret ...
2D Truss Analysis with ANSYS Workbench
Просмотров 6 тыс.3 года назад
You can get a copy of the book here: www.amazon.com/Practical-Stress-Analysis-Finite-Elements/dp/1908689404/ This 2D Truss analysis is based on example 5.3 from pages 129 to 132 of the third edition of "Practical Stress Analysis with Finite Elements" by Bryan J. Mac Donald. In this tutorial we show how to build, mesh and solve a truss model using ANSYS Workbench and how to generate and interpre...
your god of fem thanks!!!
can we model stepped bar as u moddelled in 2D plane as if is it a plane cross it along the length?
Great tutorial... didn't skip any steps.. in my consulting business I frequently create "how-to" videos using various software programs... and as an adjunct professor at CSULB I always explain every step and don't assume my students will automatically just know what I meant instead of what I said.
This is one of the most comprehensive videos in all of youtube on ansys. Immensely thankful.
that was a very good video. However i cannot excess the von mises equivalent solution for this matter. Why? and how to get von mises solution?
you had put 25% reduction as 0.025 not 0.25 ,, could you please explain why?
Hi, in this case the block has a height of 0.1m to we are moving the top die down by 0.025m as this is 25% of 0.1m. Hope this helps!
thank you sir@@LearnFiniteElementAnalysis
Thank you so much, I was looking for a tutorial like this all night, thank you.
Hi, I have a question. How can I get a Hydrostatic Stress Gradient? thank you
Hi. This is not readily available in workbench. You would have to calculate it (more or less following the method that I show in the video). The hydrostatic stress gradient is basically the ratio of the difference between the stress values of two consecutives nodes to the distance between the nodes, so you would have to do calculations on all of these.
I habe done this analysis can i use this as my mini project?
Hi, really helpful video! I'm wondering if you could explain why you ignore the negative value given on the normal strain results. Do + and - not indicate the maximum compressive and tensile values? Thank you
Hi, the negative values indicate compressive stress/strain while the positive values are tensile. The reason I am ignoring them is that, if you take a look, you will see that the negative values are (at least) an order of magnitude smaller than the positive values. For example, at time 36:00 in the video, the max tensile stress is 3e7 Pa while the max compressive stress is -6.7e5 Pa. Hope this helps.
thanks man helped alot.
thank you sir
Very lucid video.
Thanks Bryan. Your book was available in my university library ( Staffordshire uni in UK) and I have used it religiously and referenced it on my masters module of structural analysis. It has been quite helpful.
Hi Kyle, thanks for your kind comments - I'm really glad the book was of help to you!
gettin a question mark on model in geometry...parts
what do you do if tou want to make a knee given the effective length of the knee (pipe)
Great lecture sir!! Thank you so much. ❤ from 🇮🇳
Very nice video, very nice practice. where can i buy your book ?
I bought one we can share it if you want <3
@@guillaumerouffignac4718 yes senpai UwU
Sir why did you remove your videos of ANSYS APDL explaining practical stress analysis with finite elements...where can I find those videos?
Hi, do you mean these ones: ruclips.net/user/GlasnevinPublishingvideos They are a bit out of date and I plan to update them and post them to this channel.
@@LearnFiniteElementAnalysis yes those were the ones....thank you 😊😊
THANK YOU FOR THIS VIDEOOOOOOOOOOOOOOOOO. This is literally what I needed, in here you can actually understand the concept of finite elements.
nice guy
thanks
How can we determine hydrostatic strain in Ansys workbench?
Hi, you would use the same method shown in the video but select the three principal *strains* instead of the stresses (as I showed in the video). Hope this helps.
For LST and Q8 , how ?
really helpful, thank a lot
Glad it helped!
How to expand axisymmetry result.
How could I make a crack in this 2-D beam element and do the modal analysis ??
hello sir instead of using the number of division tool in sizing if directly change the size of all elements then what will be the difference in meshing in that way.
Hi. it's possible to get a good mesh, or even the same mesh, with both methods
At 18:36, you chose Beam Results to analyse the stresses in a 2D Truss element. Practically it is not possible to solve a truss element as a beam...Wouldn't the analysis be wrong then?
Hi, may i ask is creep energy density available in ANSYS worksheet?
Hi, as far as I am aware, it is not directly available. You would have to calculate it from other values in a similar manner as I have shown in the video
I did exactly as you said and The Analysis is in 2D i get this message ( A solver pivot model warning or error has been detected in the UZ degree of freedom of node 3806 located in UNknown this is usually a result of an ill conditioned .....etc) can you help me?pls
Hi, that error message is basically saying to you that your model is unconstrained in the z-direction and can move as much as it wants in the z-direction. Clearly this is a 2D model and should only have degrees of freedom (DOF) in the x and y directions. I suspect what has happened is that you forgot the step early in the video where you set the analysis type to a 2D analysis!
@@LearnFiniteElementAnalysis thanks alot for your help actually it was because the file name should be in English and i was using German letters so that was the problem
How did you know S1, S2, S3 would work and is the correct variable when in your solution tree the name is "Maximum Principal Stress", "Middle Principal Stress", "Minimum Principal Stress"? Is there a description for all the expressions listed in the ANSYS worksheet?
Hi, in general stress analysis (not just FEA) the maximum principal stress is always S1 and the minimum is always S3 - this is a convention that is always used in stress analysis. So, if you had three stresses, say: 300 MPa 200 MPa and -400MPa then S1=300MPa S2=200MPA and S3=-400MPa.
@@LearnFiniteElementAnalysis is there some datasheet prepared by ANSYS that defines these expressions?
Nice video
Thanks!
Thanks for the video. Was really helpful. One question though , the way you applied the boudary conditions seemed a little redundant to me. If I was doing this analysis I probably would have gone with fixed support. Can you explain a little bit as to why you took this approach? I am just a learner so maybe I am missing something obvious.
No problem - glad you found it useful! If we applied a fixed support then the nodes that make up the edge of the plate would not be able to move in any direction. We want these nodes to be able to slide along the line that we have added the boundary conditions to - so that the plate can change shape due to the applied load. If we applied a fixed support instead then the plate would not deform properly. Hope this makes sense?
How can i simulate 2D axisymmetric model with a force isn't symmetric ? It means the force just has the impact in one side of the model (don't be axisymmetric)
Symmetry should be not only in geometry but also in loading. Keeping this in mind you can try make a symmetric model if possible.
Yes, you are correct. In order to use axisymmetry (or indeed any other type of symmetry) both the geometry and loads must be symmetric about the axis of symmetry.
ANSYS Classic/APDL has a method called "harmonic axisymmetric" that allows you to apply non-axisymmetric loads to a standard looking axisymmetric model. The element formulation is adjusted to allow this behavior. The term harmonic is confusing to many because the harmonic refers to Fourier coefficients used to define the non-symmetric loads. Harmonic here does not mean dynamic or time-changing.
What should I do if I want to mesh the cross section as 2D mesh instead of 1D mesh?
Hi, I am not sure what you mean here. The bicycle problem is 3D so you could use 3D solid elements instead of beam elements if you wanted but I am not sure how or why you would use 2D elements to accurately model this problem
Great video. Thanks a lot! By the way, I wonder if you know how to solve the problem "a cylinder under torsional load" in 2D axisymmetric way? I have seen it in some papers but I don't know how to do it exactly. It seems ANSYS has some special elements for it which can be seen simutechgroup.com/a-brief-introduction-to-the-solid272-and-solid273-general-axisymmetric-elements-in-ansys/. I have been stuck by this problem for some days and I would be grateful if you can help me.
Hi, glad you liked it! It is possible to apply a rotational velocity to axisymmetric elements in workbench. If you open up the help system and go to the verification manual and look up VM-WB-MECH-062 "Stresses in a Long Cylinder" you will see an example of how to do this. Otherwise, I think you would need to use ANSYS APDL (i.e. the "classic" interface to ANSYS) in order to be able to use torsional loads on axisymmetric elements.
I attempting to generate the surface, but when using the create surface tool , only the center hole gets filled.
Hi, it's possible that the lines making the outer square are not joined together - there may be a small gap between them. Try checking this and see if it helps!
Which is the best software for FEA ??
Hi, any of the commercially available software's are good! ANSYS workbench is reasonably easy to learn how to use which makes it quite popular.
Hello,Thank you for the video. I'm trying to apply symmetry BC on a plate with an elleptical hole in the middle (the geometry I made is a forth of this plate) , it's a composite model so I did the ACP-pre work then imported it to Static structural to apply the load and the BC. However, as I clicked on the symmetry icon to apply symmetry regio, the symmetry region icon is not activated and I can only use the cyclic symmetry. What should I do and what should I do to be able to use the symmetry region option ? Thank you.
You are welcome! I haven't done a lot of work with ACP recently so I don't remember all of the intricacies but two things come to mind: 1) are you sure that your geometry is defined on the xy plane and not another plane? 2) did you make sure to select a 2D analysis at the start? - if it is expecting a 3D analysis then it may be forcing the cyclic option.
thanks for detailed explanation..very helpful
Glad it was helpful!
Many thanks to you Doctor! I've just received the book that I ordered in AMAZON! ITS SO NICE!!!
That is great - I am glad you like it! Thanks for the feedback.
Thanks. Very usefull.
Glad it was helpful!
after generating mesh i click on static structural but my model goes back to 2d plane with no thickness, and the mesh disappear
Hi, that normally isn't a problem. If you click on mesh again then the mesh should be redisplayed. Sometimes workbench turns off the display of the mesh to make it easier for you to pick geometrical features when applying loads etc.
Thank you, that was helpful!
Glad it was helpful! Thanks for the comment.
Fenomenal video! It helped me a lot!
Glad it helped! Thanks.
If I do this with symmetry on a thin plate in 3d I get the error: "one or more bodies may be underconstrained and experience rigid body motion. Weak springs have been added to attain a solution" How do I fix this problem?
The error message is telling you that your model is underconstrained and is moving around in space. If you did this in 3D then I am guessing that you put the symmetry constraints in the x and y axis but you also need to put at least one constraint in the z-direction.
sigma nom. 509.296 kPa
it was a good video. thanks
Glad you liked it!
cual es el nombre del libro q muestra
El nombre del libro es "Practical Stress Analysis with Finite Elements".