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  1. IMOTEC

    Pore metal Compression test

    Hi, I am trying to model a compression test for aluminium. In my model I have a 2D rigid plate and a 2D deformable part. And also my part have some space in itself. I used dynamic explicit step with 0.01 time period. It also run somewhere. But then exited with an error. It has some convergence...
  2. IMOTEC

    ABAQUS SMA modelling with super_elastic

    Thank you for your suggestion. I will try all of them. My main porpuse is modelling NiTi alloy which is shape memory alloy. Because of that i used 31 coefficent material model.
  3. IMOTEC

    ABAQUS SMA modelling with super_elastic

    I tried it for steel. So it run. No problem occured. But why the SMA model is not run. I didn't use any subroutine or something. I just used super elastic model. Also it said you should named it ABQ_SUPER_ELASTIC. But something went wrong.
  4. IMOTEC

    ABAQUS SMA modelling with super_elastic

    In message file it say 'many elements distorded exexcively'. Also you see it from file which I attached before. It turned 5 iteration which is name 1U 2U 3U 4U 5U. After 5U it failed. İf i decrease minimum initial increment, it said same thing after 13U. My model is really simple. It's one side...
  5. IMOTEC

    ABAQUS SMA modelling with super_elastic

    I think you miss understood me bwcuse of my english. I want to say MY MODEL İS SİMPLE. Of course i know SMA modeling is a problem. I want to try an example which is about abaqus super elastic also used for SMA. For second question i used abaqus for 2 years, nearly beginner.
  6. IMOTEC

    ABAQUS SMA modelling with super_elastic

    Hi, I want to model simple SMA material. I searched many forum and i found i can do it with super elastic which is ABAQUS material model. And i used ABAQUS Standart with a very simple loading. But it gave error which "too many attempt made for this increment". Also I tried to decrease increment...
  7. IMOTEC

    Metal Plasticity - Initial Yield Stress

    But another examples: "The blank is made of aluminum-killed steel, which is assumed to satisfy the Ramberg-Osgood relation between true stress and logarithmic strain, ε=(σ/K)^(1/n) with a reference stress value (K) of 513 MPa and a work-hardening exponent (n) of 0.223. Isotropic elasticity is...
  8. IMOTEC

    Metal Plasticity - Initial Yield Stress

    Nobody can help me!!!
  9. IMOTEC

    Metal Plasticity - Initial Yield Stress

    I am trying to do ABAQUS example problems. But many problems used an initial yield stress while entering material property. Passage from the example is below. "The blank is made of a steel alloy that is assumed to satisfy the Ramberg-Osgood relation for true stress and logarithmic strain...
  10. IMOTEC

    Abaqus 3d Deep Drawing

    Ohh there is a little misunderstand. There were 2 Curves. One of them which is higher is duplex Stainless steel and the other lower one is only Stainless steel and my analysis material properties are Stainless steel. and i think the fracture should occurs When i use FLD failure.
  11. IMOTEC

    Abaqus 3d Deep Drawing

    But in my experiment my max force is 9-10 kN and then there occurs fracture. But in analysis i cannot see any exsessive deformasyon until 20 kN.
  12. IMOTEC

    Abaqus 3d Deep Drawing

    I just modelled 60x60 mm2 which means not quarter, and it have 24 kN max force and 0.25 friction. Can you send me your model? I forgot to say ı changed the material properties to stainless steel. And i use true stress-true strain curves. Is it true for plastic? My force displacement graph is...
  13. IMOTEC

    Abaqus 3d Deep Drawing

    I forgot to say that in axisymmetric simulation force is true. Because where displacement is nearly 8 mm, the force is 9.5 kN. But my blank fractured at 15 mm in analysis. Maybe my material data is not true at this point. But again and again the axissymmetric BC cannot solve my problem.
  14. IMOTEC

    Abaqus 3d Deep Drawing

    I did a simulation with ABAQUS/Standard but nothing changed. It showed reaction force nearly 5.5 kN again. And also displacement is wrong. Because my experimental displacement nearly 8.2 mm and reaction force 9 kN. There is something wrong but ı couldnt find where. In addition i did axisymmetric...
  15. IMOTEC

    Abaqus 3d Deep Drawing

    I did an axisymmetric analysis. But when ı tried to load a force then error occured. It said Too many attempt for this increament. And axisymmetric cannot solve my problem because after i did this analysis i tried to show fracture area with element deletion. And also I tried deep drawing a...
  16. IMOTEC

    Abaqus 3d Deep Drawing

    Axisymmetric model is not correct for my problem because my deep drawn part is square and I changed the other simulation my model. For example first part 60x60 mm2 which i send you. And other model my part reduce 60x50 mm2 and other 60x40 and this goes like this. Punch and die is ok. It can be...
  17. IMOTEC

    Abaqus 3d Deep Drawing

    I am süre that my units are consistent. I used Pascal , meter , and Newton. I check All units. There should be different problem but where is the problem. Even if my force is mistake, When i change something there must be change something .Please check my model and try to change something then...
  18. IMOTEC

    Abaqus 3d Deep Drawing

    Thank you for your interest. I Will try what you say. But there is one more thing. Thé Force not only the problem. For example When i change friction coefficient there is nothing to change or When i changed young module also nothing change. I didn't understand where is problem. I must solve...
  19. IMOTEC

    Abaqus 3d Deep Drawing

    I am trying to do deep drawing in ABAQUS. While to do this, I'm getting help to ABAQUS examples which is name Deep Drawing a Square Box. In my model look everything is ok. But my punch reaction force is very low. In addition I did this model experiment in our laboratory. For example my model max...
  20. IMOTEC

    ABAQUS using first result for second analysis

    Thank for your interest. I think i can apply your suggestion. But I should change punch with die. Is it important? For example in step 1 sheet is flat. But in step 2 sheet have little bubble on surface. Die and punch change and dimension of between die and holder also change. this picture is my...

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