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  • Users: Mechanicslearner
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  1. Mechanicslearner

    How to find rotational force from rotation applied?

    Hello, I am simulating a wire by applying rotation at one end and fixed at other end. I applied rotation using boundary conditions, may I know how to find rotational force required to rotate the wire from output. Since force depends on material properties so I guess there might be formula for...
  2. Mechanicslearner

    Contact stress varies with different pitch size of steel wire

    Hello, I am simulating a 12 filar and 9 filar wire torsion test. I can see contact stress values even after 30 degress in 12 filar where pitch distance is more but contact stress in 9 filar even after 180 degrees rotation is zero. I am analysing using abaqus with 1D element model and I use...
  3. Mechanicslearner

    Contact stress varies with pitch size of steel wire

    Hello, I am simulating a 12 filar and 9 filar wire torsion test. I can see contact stress values even after 30 degress in 12 filar where pitch distance is more but contact stress in 9 filar even after 180 degrees rotation is zero. I am analysing using abaqus with 1D element model and I use...
  4. Mechanicslearner

    Contact stress varies with pitch distance

    Hello, I am simulating a 12 filar and 9 filar wire torsion test. I can see contact stress values even after 30 degress in 12 filar where pitch distance is more but contact stress in 9 filar even after 180 degrees rotation is zero. I am analysing using abaqus with 1D element model and I use...
  5. Mechanicslearner

    What if wrong Crank bar length for slabs is given?

    Hello, Upon execution we provided crank bar length as 0.25 L for slab instead of 0.15 L as per IS456 . May I know the consequences for this mistake and how to resolve it? The slab is for residential building.
  6. Mechanicslearner

    Rotational Moment is zero for damage modelling

    Hello all, I am trying to do torsion test where the wire breaks after certain rotations. I noticed that whenever I model for damage with damage criterion values, I am seeing rotational moment values as zero but not for plastic modelling (only with plastic values and no damage values) . Is there...
  7. Mechanicslearner

    Can Rebar area size of columns vary for different floors?

    Hello, I have designed 2 storey building but rebar size varies for columns at 4 corners.. bottom storey rebar area size is 700 mm2 and top storey rebar area size is around 1464 mm2. So am I doing anything wrong or results are acceptable?
  8. Mechanicslearner

    Flat slab maximum span allowed?

    Hello, I am designing flat slab for G+2 college building. The area is 12 x 25 metres and is it possible to design flat slab by providing column only at edges but not in the middle? I designed using staad pro by giving columns at edges and deflection is within allowable limits (DL + LL) so...
  9. Mechanicslearner

    How Plasticity of Simply supported beam 1D is calculated in abaqus?

    Hello, I am trying to calculate simply supported 1D beam with fixed end on both sides subjected to U.D.L. Now according to analytical formula stress = M/Z , where M = Wl^2/12 at suppports and M = Wl^2/24 in middle and Z = bh^2/6 in case of elasticity and Z = bh^2/4 in case of plasticity for...
  10. Mechanicslearner

    How plastic strain is calculated in Abaqus Static with nonlinear for beam?

    Hello Abaqus users, I am trying to learn how Abaqus calculates plastic strain when cantilever beam is subjected to transverse load at the tip. For axial load it can be predicted from displacement but for transverse load due to bending of beam due to point load at tip it seems different. My...
  11. Mechanicslearner

    How delta t is Calculated in Abaqus Explicit?

    Hello Abaqus users, Does anyone know how Δt in Abaqus explicit is calculated?. I tried Δt = l/c but that is stable increment. I would like to know how velocity is calculated in Abaqus explicit so I need Δt values . I even added screenshot of the formula. If it is based on natural frequency then...
  12. Mechanicslearner

    How low yielding point in stress strain curve calculated in Explicit?

    Hello, I am experimenting with non linear cantilever beam with axial point load at tip where stress levels decrease after reaching plasticity. You can see as follows Yield stress------------- plastic strain 210000000------------- 0 232300000------------- 0.00884475 255000000-------------...
  13. Mechanicslearner

    Abaqus CAE runs very slow

    Hello, My abaqus is running very slow for past 2 days. Even when I try to model wireframe in part module, it takes approximately 5 seconds when I try to draw a line, for example, I click 'create lines: connected' the cursor arrow circles for 5 seconds, then I proceed to draw line by clicking on...
  14. Mechanicslearner

    Constraint kinematic coupling not working

    Hello, I am trying to crash two simple surface to wall and these two flat surface are coupled to a reference point which is in the middle of these two surface where there is a gap and when I apply translation to reference point, it is not moving or moving very small like 0.00001 metres. Also...
  15. Mechanicslearner

    Does Abaqus CFD has ALE meshing ?

    Hello, Am trying to rotate turbine using abaqus cfd and abaqus explicit by using co-simulation. I read that Abaqus CFD does deforming mesh analysis using an arbitrary Lagrangian Eulerian (ALE) description of the equations of motion, heat transfer, and turbulent transport. But I could not find...
  16. Mechanicslearner

    Dynamic mesh/sliding mesh in Abaqus

    Hello, I am still learning Abaqus. I like to know whether its possible to design sliding mesh or dynamic mesh in Abaqus CFD or its possible only with Fluent interface?
  17. Mechanicslearner

    Low memory problem

    Hello, I have been running co simulation in abaqus of a rotor but after running for about 0.8 seconds where the analysis take about 12 hours it shuts down showing error like memory problem with warning window popping up. I am using 64 bit system with 8 GB RAM and I have plenty of memory. The...
  18. Mechanicslearner

    CFD External flow in wind turbine

    Hello, I have modelled a wind turbine and like to rotate it through wind force using CFD. In the beginning I made a model in CFD with walls, inlet outlet and other things and also made fluid surface interaction with wind blade in elastic model. The software am using is Abaqus. The thing it...
  19. Mechanicslearner

    Rotating mesh in CFD interface

    Hello, I am trying to rotate the wind turbine by wind force so I used air properties as inlet in CFD but when in coexecution with CFD and elastic body, the blade rotates to around 15 degrees and it shows error. Later I learned I have to create boundary wall in CFD for allowing rotation for mesh...
  20. Mechanicslearner

    Field output request frequency option (how does it work) for increasing frames?

    Hello, I tried to increase frame rates by increasing n time increments to 8 from 1 where my total time for analysis is 8 secs. But the strain and stress curves are more curved (obtained from XY data) when the frame rates are increased (more than 1) and its linear when there is only one frame...

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