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  • Users: frztrb
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  1. frztrb

    Problem of Detaching of rod from the cam

    Hi All I have a mechanical gripper that its axis is connected and guided by a cam , for me it's important to regulate the speed of the cam , but increasing , the rod might get disconnected from the cam, is the any solution to this problem ?
  2. frztrb

    Best Simple Tool (cylinder) gripper mechanism for high speed translation

    Hi All I was searching for some mechanisms , for a two finger like gripper that hold a small cylinder, like 5 cm hight and 3 cm diameter , in a high speed, (metal cylinder) , like 2 pieces per second where can I find some Ideas , and do some analysis , how do you suggest me to do the analysis...
  3. frztrb

    Need Some Advices to design the mechanism of a self assembly furniture bolt

    Hi All To design a bolt , I just have it's dimensions and the moving limits, how do I design and modify the mechanism ? is this possible in CATIA or ADAMS ? cause in mechanism design , usually forces are the input or the output of the analysis, how can I do this without force? thank you any...
  4. frztrb

    C4 Stainless steel other names

    Hi All I have to select a C4 stainless steel from a material library ,where the names are given as metalurgic compositions , such as X10Cr13- blabla or DIN or JIS or AISI , and thir min or maximum temperature, how do I know which is the C4 ? also if you introduce a reference about this to me ...
  5. frztrb

    Question About online preventive maintenance of Induction motors

    Hi All I would like to know , whether we need to have maintenance in a preventive way , if the induction motor that usually works in a constant speed , 400 V , 40 A ? when it has an inverter that also (I am not fully informed in this area so if you let me know what are the objectives of the...
  6. frztrb

    Merge geometry or tie constraint

    Hello, What type of modelling in Abaqus do you prefer? I mean when it is recommended to merge geometry from parts into single large part? How often do you use tie constraint? As far I know the effect is almost the same - we can tie together parts of the geometry - we can tie together degrees...
  7. frztrb

    Problem in Modelling of a chasis in CATIA

    Hi all I was trying to model the chasis of a bike in CATIA , and then do the FEM analysis in abaqus later, but the problem is that when two tubes intersect eachother, that if the section of the tubes are not circular, it would be a problem to mesh the parts , my Idea was to fillet the end of...
  8. frztrb

    What is the Acknowledgement Module in CATIA ?

    Hi All Is there a module called Acknowledgement in CATIA ? because I know the knowledge advisor ,but I doubt if this expression also exists, I was searching for it but no results
  9. frztrb

    IS there a code for Galerkiin Method ?

    Hi All I was studying the Galerkin Method , most of the Material on web and in the books have a difficult presentation of this method, I don't know how I can try to code it , has anyone done this before ? any advices?
  10. frztrb

    Open source FEM Code for meshing the .igs file

    Hi All Does anyone know if there is an open source code for FEM that can import an .igs file and give the node coordinates and numbering ?
  11. frztrb

    Displacement gradient componenets and macroscopic strain

    Hi All I need some clarification of the terms : displacement gradient with components H_ij=du_i/dX_j , from which the Average strain ( is it macroscopic strain ??) is achieved : E_ij = 0.5 *(du_i/dx_j + du_j/dx_i). that will always display symmetries since E_ij=E_ji. I am searching to find...
  12. frztrb

    Displacement gradient componenets and macroscopic strain

    Hi All I need some clarification of the terms : displacement gradient with components H_ij=du_i/dX_j , from which the Average strain ( is it macroscopic strain ??) is achieved : E_ij = 0.5 *(du_i/dx_j + du_j/dx_i). that will always display symmetries since E_ij=E_ji. I am searching to find...
  13. frztrb

    Some Problems with Element Connectivity Matrix

    Hi All trying to write the Element Connectivity matrix in MATLAB , reading about it somewhere , I have a bit of doubts that how it is done here , it say that it is done in a counter clockwise way , I don't see that , how ? and also for example , for the node 1 it is mentioned that it is...
  14. frztrb

    Two different results for the same Stress output in python

    Hi All when I use this code after my analysis , I only can get the results on integration points myViewport.odbDisplay.setPrimaryVariable(field=stress,outputPosition=INTEGRATION_POINT,refinement=(INVARIANT, 'Mises')) but from this one the stresses are available on all options ...
  15. frztrb

    I want to optimize the stiffness matrix of a rectangular plate in Abaqus

    Hi All for the above intention , Since yet I have not decided yet the strategy of the optimization for that , I would like to know , if I wanna optimize all the stiffness matrix components with regard to deflection and maximum stress and weight, can I use Abaqus optimization tool , or should do...
  16. frztrb

    Optimization and Structural Optimization & References

    Hi ALL Since I am new in this topic , and my intention is to conduct some optimization on an orthotropic plate deformations , bending and perhaps shear , I would like to know , whether should I start from Optimization books and concepts , what is the difference in discussion when the topic is...
  17. frztrb

    Simple Question About Shell constituitve ( ABD) matrix

    Ok , as I am reading here , on page 15 I see http://www.colorado.edu/engineering/CAS/courses.d/AFEM.d/AFEM.Ch32.d/AFEM.Ch32.pdf but the matrix is defined 6 * 6 and I think in shell with one layer we shoul not talk about ABD so ? but here in this paper...
  18. frztrb

    Simple Question About Shell constituitve ( ABD) matrix

    Hi All First I would like to know that for shell (and plates?) we use and define ABD matrix like laminates or not ? is it correct that in ABD matrix calculation in the integral , in a laminate , we put the transformed matrix that it's stresses are along the fibers , cause the stresses in that...
  19. frztrb

    Simple Question About Shell constituitve ( ABD) matrix

    Hi All First I would like to know that for shell (and plates?) we use and define ABD matrix like laminates or not ? is it correct that in ABD matrix calculation in the integral , in a laminate , we put the transformed matrix that it's stresses are along the fibers , cause the stresses in that...
  20. frztrb

    Simple Question About Shell constituitve ( ABD) matrix

    Hi All First I would like to know that for shell (and plates?) we use and define ABD matrix like laminates or not ? is it correct that in ABD matrix calculation in the integral , in a laminate , we put the transformed matrix that it's stresses are along the fibers , cause the stresses in that...

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