See How I Designed an Amazing Hexagonal Lattice Structure

This video shows to design a Cellular Hexagonal Lattice Structure in ABAQUS. I show detailed step by step process for creating this model. It is not always very easy to create this type of lattice but the approach here can be adapted for creating re-entrant lattices.
#latticestructure #hexagonallattice #cellularhexagonal #lattices #abaqus #abaqustutorial #fea #feamethod #3drve #rvemodelling #rve #abaqusmodelsetup #representativevolumeelement
Time stamps
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00:00 Intro
02:55 Sketching of 2D sketch of the Cellular Hexagonal Lattice
07:47 Leave me a comment with a video request
12:58 Outro
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✔️*Link to Michael Okereke's Finite Element Applications textbook
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[@mohammad.kh2778]

Dr. you designed spherical and oval shaped particles as boosters please design plate like particles as well. Grateful

[@MichaelOkereke]

I have always had this idea about creating plate-like particles. I have thoughts of how it can be done very manually but I think the best approach will be to create it automatically using some kind of Monte Carlo method. This later is definitely hard and creating a python script to do it is not trivial. I will keep thinking about it and see if I can make such a video but that is a good question.

[@musedegefe5906]

It is interesteing Dr Mike! Why not linear patterning?

[@MichaelOkereke]

I used linear patterning both vertically and horizontally.

[@NAVDEEPMALIK-ve3sr]

Hi sir, i want tensile testing of hexagonal lattice/unit cell for elastic properties validation

[@MichaelOkereke]

Hello, the purpose of this video is to show how to create the virtual domain as that is the challenging part of this sort of modelling. If the interest is elastic properties, then there are a lot of videos I have made on lattice structures which you can adopt, follow the process and then simulate that. You just have to use this cellular hexagonal lattice structure here. In my opinion, this is rather straightforward and I have videos on the channel that you can follow to help you complete the modelling. Getting the virtual domain is the harder bit, I think!

[@shankarlalgugulothu3031]

How can we mesh into more than one element when it is treated as a strut (Bar-Truss Element), A Truss element always be a single element between joints.

[@MichaelOkereke]

Hello, you are right about the bar-truss element comment. However, bar-truss elements are one-dimensional elements which suggests that you should be creating the virtual domain in a 2D plane rather than a 3D plane. If this structure was created in 2D plan, and the struts modelled as trusses or beam elements, then yes, your expectation would be correct. However, I am considering a 3D analysis, most suitable for energy absorption studies. So, we have to create a 3D virtual domain (which is what I showed here). With that, you then need to model it with continuum (3D elements) in which case the mesh should also be 3D elements (hence what you see in this video). It all depends on the problem you are solving. I am working on a 3D problem, you are referring to a 2D problem.

[@ravsuma1214]

Dear Sir, You have used the function "merge" in the assembly module. I request you to tell the meaning of it. Suppose I have to apply "embedded" constraint then is it necessary to "merge" before applying the constraint...please comment related to this issue.... Regards.

[@MichaelOkereke]

Hello, I do not know much about the embedded constraint option but I have seen it being used. I reckon if you use it, you would not have to use the merge function but do not quote me in this. It is something I need to research further myself to be able to tell you definitively.