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  • Users: Mofy
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  1. Mofy

    get right values in drop test simulation usinf abaqus

    Hi all: I'm trying to simulate a drop test of a structure from certain height. I entered all information needed for running the simulation. when I looked for the results in history, I found that the C.G. acceleration graph started from zero value. As the drop test is of free fall object type...
  2. Mofy

    Connector - midside node

    Hi, I'm trying to statically analyze a structure under weight. In real world this simple structure is able to withstand the weight but in abaqus it deforms largely. I used stress-strain curve for the material and considered the plastic aspect. Can any one guess what is the problem? Regards, Mofy
  3. Mofy

    low pass filter in abaqus

    Hi all, I'm wondering if someone can help me with tips on how can I use low pass filter in impact simulation in interactive module of ABAQUS FE solver? Regards, Mofy
  4. Mofy

    Prevent penetration of 3D beam into analytical surface

    Hello IceBreakerSours, Thank you for your reply. The problem that I am trying to solve needs the tube be modelled as a beam and this tube is drop tested on an analytical rigid surface. I tried many techniques to model the interaction between these parts but I could not prevent the penetration...
  5. Mofy

    Prevent penetration of 3D beam into analytical surface

    Hello all, I'm trying to model an impact of a 3D beam on an analytical rigid. Can any one explain how the penetration of the beam into the analytical rigid body can be prevented. I tried general contact but it did not give the desired result. Regards, Mofy
  6. Mofy

    Connect C.G. to tube

    Hello, I am trying to model one horizontal tube connected to a center of gravity positioned at a distance from the tube in Abaqus 6.11. I used two beams as connectors between one reference point that represents the C.G. and two reference points at different locations on the tube. Is this...
  7. Mofy

    keep rigid connectivity between parts

    Hi Bartosz, Thank you for you help. There is no need to convert the file to ver. 6.11 because I imported the input file. It works perfectly.[bigsmile] May you help by answering the following question: if I've a point that represent the center of gravity of a part (which has a mass) and a part...
  8. Mofy

    keep rigid connectivity between parts

    Hi. I appreciate your help. If you do not mind can you convert the file from version 6.12 to ver 6.11. This because I was not able to open it in my version. When I converted it it thing was shown in the screen. Regards, Mofy
  9. Mofy

    keep rigid connectivity between parts

    Hi. Bartosz, Thank you for your help. As I told you that I am a new user. My interpretation to your sketch is: I have to draw the sketches (circles) on new datum plane, then constrain (tie) it to the outer surfaces of both tubes, But what is about the reference point that I should define? If...
  10. Mofy

    keep rigid connectivity between parts

    Hi Bartosz, Please see the attachment below for the tubes that are not overlapped. It is a SIMPLE assembly. Regards, Mofyhttp://files.engineering.com/getfile.aspx?folder=d4bd61e1-27c6-4349-9512-aba567090481&file=23-Jan-14_3-10-34_PM.jpg
  11. Mofy

    keep rigid connectivity between parts

    Hi, All three parts are deformable. Regards, Mofy
  12. Mofy

    keep rigid connectivity between parts

    Hi. I followed the steps that you mentioned but the following error preventing the running of the model. error:(Node 40 instance front cross-1 belongs to more than one rigid body). This means that we can only connect two different parts at the same time. In my case I cannot connect two tubes to...
  13. Mofy

    keep rigid connectivity between parts

    Thank you Bartosz for your reply. The main problem in this task is when I tried to connect two tubes to another third tube at two different locations. In fact I did not write the code but I'm using the interaction module to draw and analysis the model. Here what I did: I defined reference...
  14. Mofy

    keep rigid connectivity between parts

    Thank you Bartosz for your reply. Could you please explain, in more details how can do the 2nd choice when I have a gap between two parts that constitute an assembly? Regards, Mofy
  15. Mofy

    partitioning a hollow tube as a cell

    Hi: While I was attempting to partition a hollow tube using cell option and datum plane in abaqus 6.11, this message is appeared "there are no geometric cells to be partitioned" even though I tries to select the the tube. Can any professional tell me what is the error and how can avoid it...
  16. Mofy

    keep rigid connectivity between parts

    Hi. I've a problem of keeping the structure intact during the impact simulation of two different parts. I used connector elements "weld" to weld these parts together but t the moment of impact the parts look as not having any rigid connection between them. Any help is appreciated.
  17. Mofy

    problems in modeling skid landing gear using abaqus

    Hi guys, I'm trying to simulate the impact of skid landing gear for a helicopter with a surface using Abaqus. I used shell elements to model the cross-beams and skids. I'm trying to connect them using weld connectors and to use four reference points two on each cross tube to represent the...

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