Modeling RC Column subjected to blast loading using LS-Prepost + LS-DYNA (S-ALE)

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Modeling RC Column subjected to blast loading using LS-Prepost + LS-DYNA (S-ALE)

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Dyna Forming Engineering & Technology DFETECH

Күн бұрын

Step-by-step tutorial to set up simulation of RC Column subjected to blast loading using LS-Prepost.
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Пікірлер: 29

@alliswell.-560 3 жыл бұрын

Thank You. I really appreciate that. Please continue shooting another LS-DYNA videos on RC structural elements.

@navyamupparaju1529 3 жыл бұрын

How much blast load is applied in this video?

@dfetech 3 жыл бұрын

@@navyamupparaju1529 Sorry for late reply. The blast load is define at *INITIAL_VOLUME_FRACTION_GEOMETRY and use *INITIAL_DETONATION to control the position & lighting time of the detonation point. LS-DYNA take the density of “Standard” TNT to be 1.57g/cm3 & detonation velocity to be 0.693cm/us. In this model, we use sphere with radius of 10cm as the TNT. To define the blast load you want, you need to use approximate the equivalent mass of TNT. For more info, please refer to LS-DYNA KEYWORD USER'S MANUAL Volume I.

@riyansireddy4143 2 жыл бұрын

Sir can you do video on beam

@hamzagungor3029 6 ай бұрын

Please one extra initial volume fraction geometry video. You are perfect .

@shriyaverma2565 9 ай бұрын

What will be erosion criteria for concrete MAT_072R3 ? And how can we find depth of crack in concrete? The concrete slab is subjected to airblast load.

@duongng99 6 ай бұрын

i have a question for u. how to create model reinforce concrete with steel bar? i need to create model concrete in real live to simualate. Thank you so much

@riyansireddy4143 2 жыл бұрын

In which direction we hv to give 3rd node direction for stirrups and main bars in beam?

@simonematerazzo7020 3 жыл бұрын

at 19:03 it appears a " 1000 auto created PART". I don't understand how you can add an auto-created part. Can you please explain? Thanks. Great tutorial anyway.

@dfetech 3 жыл бұрын

Sorry for the late reply. The part ID 10000 is the S-ALE part, it is created automatically after you define the DPID in *ALE_STRUCTURED_MESH and accept this keyword. You can change this DPID to any value, but please make sure all the PID refer to the S-ALE are the same, e.g. in *CONSTRAINED_LAGRANGE_IN_SOLID, otherwise your model wouldn't work.

@riyansireddy4143 2 жыл бұрын

Sir how you created stirrups?

@shiqizhang3532 Жыл бұрын

I got an error when it running that beam 228 has zero area this message had occured lots of times

@shiqizhang3532 Жыл бұрын

I get it it lost the area para in the section on beam

@JH-nn6oi 2 жыл бұрын

Could you share .K file? No matter what I do, the results of the analysis are not good. (No load is applied to the reinforcing bar, and the concrete element is not removed.)

@song-up8fj 2 жыл бұрын

I don't know where I'm going wrong, it doesn't even work.can you share your k file, i want to see why i can't

@shiqizhang3532 Жыл бұрын

it's same as mine

@shiqizhang3532 Жыл бұрын

the lstc suggested me that use*beam in soild and it work ！

@gautamkumar-lu3xx 2 жыл бұрын

I want to join Dfetech please tell me about course

@zahirshah22 3 жыл бұрын

Could you share the 3d CAD model used in the simulation?

@dfetech 3 жыл бұрын

Sorry for late reply. You can create this model in LS-PrePost directly. See this video >> kzfaq.info/get/bejne/gcCRmdCD3ZjNpYU.html on how to create it.

@navyamupparaju1529 3 жыл бұрын

How much is the blast load applied here?

@zafertoral5840 Жыл бұрын

Firstly, thank you for tutorial. ı have a question. when you did beam section you wrote TS1=25 and TS2=25 for both rebars. Are these values diameter for rebars? if these values are diameter, longitudinal and transverse rebars diameter have same thickness. This is wrong in civil engineering.Transverse rebars have mostly 10 mm diameter. in this tutorial, did you not care these values.about rebar thickness.

@dfetech Жыл бұрын

Hi Zafer, Firstly, thanks for your comment. We hope this video do provide some help on your activities. TS1 & TS2 are the outer diameters, you also can enter inner diameter in TT1 & TT2. For other settings, please refer to LS-DYNA Manual Volume I. The intension of this video is to guide users how to use S-ALE in LS-DYNA, so we don't actually care the value as long as the model is work, we are able to change it afterward when needed. All the parameter in section/material/EOS are freely to change, as long as the UNIT in LS-DYNA are CONSISTENT. Thank you & wish you a wonderful journey with LS-DYNA.

@zafertoral5840 Жыл бұрын

@@dfetech Hi. ı have a question again :D I did everything how you show like in this tutorial. But, in the RUN ANALYS stage, I having a Error. " Cannot find the executable:mpiexec" writing in the error box. How I overcome this problem. Thank you for supports

@dfetech Жыл бұрын

@@zafertoral5840 Hi Zafer, if you are using LS-DYNA MPP solvers. Please make sure your workstation has correct environment for mpiexec before submit your job. Please contact your local distributor for help. Thank you.

@lianghuang6095 3 жыл бұрын

so the values of curve 1 are all 0,why?

@dfetech 3 жыл бұрын

Sorry for the late reply. Please do not follow the materials properties in this video, it is just a sample material. Please use your own concrete materials properties to get the accurate results. You also can use other material models in LS-DYNA like mat084, mat084/085, mat145, etc.

@shiqizhang3532 Жыл бұрын

why the refincement has no change 🥲

@zafertoral5840 4 ай бұрын

ı did everything like this tutorial and my analysis runded but column or rebar had no deformation. did you solve this poblem?