How to specify solid65 elements for the beam. Is it possible to model the beam without rebars? I need to obtain a crack pattern for the vibration load applied. I already modeled the beam in static structural and modal analysis, I tried to change the elements to Solid65 using APDL command snippets.
But it is showing errors. How to solve this problem? This command will be ignored. There is something with the concrete command and the elements you are using. Soldi65 is 8 node HEX element so you need to use that when meshing. There is also a prism option but not sure how to use that never used this element. This is see below how to define the nonlinear CONCR model sure you can find lots on that on the internet.
Obs: this is a nonlinear material model, so of course it can not be used in modal analysis. To use this you would need to use a nonlinear transient dynamic analysis. Untensst is a constant, and somethng one would have defined in the script, otherwise replace the below names wit the actual values.
Thank you for mentioning. I'm not quite clear about the "choosing 8 node hex element during mesh", you've mentioned. Could you please explain that. I use Ansys workbench And also I need to first simulate it in modal analysis, it is a must for my work.
I need to extract the frequency range.I am trying to work solid65 command for unreinforced UHPC. The commands which give more accurate results are the following:. In the manual it is stated that: "If constants are input and constants are omitted, the latter constants default as discussed", meaning C9 should be 0.
Thank you in advance.
friction between the steel and concrete
If you want to enter constants and 9 and omityou can do so in 2 lines or 5 lines of command. Thank you! Another question I have; how to input the tensile stress-strain experimental data for concrete? The command above is for compression and want input tension too. Is that possible? I don't think you can input tensile stress-strain data for Solid65 element. It is linear up to the tensile strength. If you want to include damage-plasticity after the tensile strength is reached, then I think you should use Microplane elements.
Changing elemrnt type in workbench
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Discussion Problem with Stress Relaxation after cracking-solid What to search discussions comments polls questions answers. October in Structures. Regards, Zoi. October edited October Thank you.
Semih Member. May 23 edited May Hi, I don't think you can input tensile stress-strain data for Solid65 element. Sign In or Register to comment. Commercial Support Ansys customers with active commercial software licenses can access the customer portal and submit support questions.Posted: Fri Jul 11, am. Hallo, I would like to model a reinforced concrete beam in ansys workbench.
I would like my beam be 3d element solid65 and the reinforcements LINK element. Is it possible that I could model?
Can I see the crack pattern in the beam at the time of failure in ansys workbench? I would want to gradually increase the pressure and find the pressure at which it fails. When I do so, I get a convergence problem. It would be nice if someone could help me regarding this. Back to top. Since Workbench does not support this element directly one would have to use command blocks to change the mesh from the default Solid to Solid Example command block required for each concrete solid : Et,matid,65!
You can also access the crack plotting in APDL, but again would need to use command blocks to create the plots in workbench. Define view options! Make sure to use lower order elements. Add loads, BC's etc and could add beams of rebar 2 Create a series of named selections of the edges lines you want the rebar to exist if creating in APDL, additional areas to load, support, postprocess, etc.
You can use these as components in APDL since no geometry exists. It often is also easier to use a displacement based convergence rather than force using more of an "explicit" approach if you want to be able to predict the response beyond the initial onset of cracking. Just an example since the ideal settings are very problem dependent: Nsubst, Neqit,5 Cnvtol,u,1e-4 Good Luck!
Peter Peter Barrett, P. CAE Associates, Inc. This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any copying, distribution, dissemination or action taken in relation to the contents of this e-mail and any of its attachments is strictly prohibited and may be unlawful.
If you have received this e-mail in error, please notify the sender immediately and permanently delete the original e-mail and destroy any copies or printouts of this e-mail as well as any attachments. However, I am not sure these elements can be applied with failure criteria. Rajendra Desserve Engineering Solutions www. Rukmani, You can't create failure directly in the links unless you use some kind of "ekill" option based on a strain value for example. However, I don't think that is necessary.
I would recommend defining a nonlinear stress-strain curve such that when the rebar yields it will lose most of its strength and this should be adequate in your case. The other "failure" issue to deal with would be debonding between the concrete and steel.
This could be modeled with ANSYS beam-to-beam contact, but again probably not something that is significant relative to all the other assumptions needed and usually is neglected with this type of modeling.
Posted: Sat Jul 12, am. Respected All, Thank you very much for your replies. As Mr. Peter Barrett said I modelled my concrete beam with solid65 element and reinforcements with link elements and asssigned these following properties in ansys workbench. I got a converged solution. But as I need to see the crack patternsI transfered the DS. I can see the element solutions, But unable to see the cracks at each step. Could you please tell me How I could solve this problem and view the cracks at different stages.Log In.
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By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. Sorry, but could not get what are you asking for. Because, first you have to define a material model you will use by TB command.
It looks like your tensile strength is correct. The Shear transfer coefficients are values used to decrease the amount of shear transfer after cracking as compared to a solid, uncracked material. I think in general the closed cracking should be greater than open to simulate real life behavior.
I ususally use a closed value of 1 no loss of shear transfer. If you are positive that the concrete will crack because of tension and there are no large compressive forces, you can turn off the crushing capabilities by putting Its suppose to help the solution converge.
Red Flag This Post Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Several of the tooling and casting requirements of a part can be addressed at the design stage. If these requirements are not addressed at the design stage, lot of time is spent in design iteration when the design reaches the die caster.
These design issues lead to increase in time and cost of production leading to delay in time to market and reduced profits for the organization.I am trying to model a hollow core floor slab. I have modeled it as an I-beam, and has only concrete, and pre-stressed steel. This discussion has an example of how to use concrete with a solid65 element.
I have read through the discussion you have referred to. That example is done in Workbench using Command objects. The danger with Command objects is that they contain numbers that assume one unit system, but there is nothing to prevent the user changing to the wrong units and solving. I have done this myself. Ansys customers with active commercial software licenses can access the customer portal and submit support questions.
You will need your active account number to register. Discussion How to recreate Solid65 concrete and Link rebar in Workbench What to search discussions comments polls questions answers. Abhisek Member. April in Structures. Being very new to ansys, I have no idea how to recreate these materials in Ansys Workbench April edited April May edited May Thank you for your reply. Sign In or Register to comment.
Transient structural using solid65 element
Commercial Support Ansys customers with active commercial software licenses can access the customer portal and submit support questions.Join Date: Nov I am trying to simulate concrete material under three-point bending in Ansys Workbench The concrete beam unnotched will be under displacement load at the center while as the both ends will be fixed. The design geometry is simple which I have already completed.
I ran the simulation by using Concrete material from Engineering Data but the results are not as per expectation. Since concrete has no reinforcement so it should fracture after certain load. I searched on internet and found that better to use Solid65 for such fracture and cracking behavior. Could someone please guide me on the following queries; 1.
How could I enter Solid65 in Ansys workbench? I saw one of the video in which the user replaced the structural steel with Solid65 but I could not really get the need of the stress strain data which was used in it. Second simulation, will be similar to the first one but in this one there will be addition of polymeric fibers in the concrete beam. So in this case there will not be brittle fracture behavior of concrete.
Instead there will be beam bending ductility and development and propagation of cracks on the beam surface. I think Solid65 will be suitable to use as concrete since it can have cracking behavior as well.
But could someone suggest me how can I model fibers in to the concrete beam? I am having problem in modelling fibers random distribution within the concrete beam in Ansys Workbench.Over-Reinforced Concrete Beam Test
For both simulations, I have experimental results and I would like to verify using Ansys simulation. Should there be any place where I shall enter all those experimental results in Ansys before running the simulations? Thank you. Tags ansyscrack propagationfracture behavior Thread Tools. BB code is On. Smilies are On. Trackbacks are Off. Pingbacks are On. Refbacks are On. Forum Rules. All times are GMT The time now is Add Thread to del.
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Then I save the file as As I know, AWB selects element types that best suit the model components engineering data material properties. What I did in my job is the following:. One engineering data default material, i. Please advise urgently. I'm having trouble understanding what you have been doing to isolate the source of your error. At first you mentioned that you generated an input file from Workbench which you then intend to use in Ansys Classic, correct?
If that's the case, shouldn't you be able to see the material and property assignments directly in that input file using a simple text editor and modify them as needed to run your analysis in APDL? In the second part, you mention inserting commands in Workbench Mechanical. Where did you insert the custom command exactly? Is it within the geometry environment or the solution? In my experience, this is what I would have done to override the element type in Workbench Mechanical or any of the other properties.
What I believe happens is that every body body, surface, lines gets assigned a number matid which just gets added on as the program cycles through all the bodies. Each body is assigned a material, element, real constant etc. So by doing steps 1 and 2, you assign that number which you can't see by default to a variable which you later call upon and use in Step 3 to overwrite the material properties.
See if you have any luck with this, or provide additional information on the nature of your problem. Does this mean my default Element Typ was the same as my manuel typed one? How come? Someone any Idea, why? I were very glad if someone might answer my three questions. Red Flag This Post Please let us know here why this post is inappropriate.