Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: alleak
  • Content: Threads
  • Order by date
  1. alleak

    Finding the initial shape of adeformed structure

    Hi; I want to know how can i find the initial shape of a deformed structure. I have a filament wound pressure vessel and i know that the optimum shape(after deformation) for the dome is a geodesic dome so i want to know the undeformed shape which produces that geodesic shape after loading with...
  2. alleak

    analysing a 3d composite vessel

    I am analysing a 3d composite(carbon/epoxy) pressure vessel with ansys using shell99 elements and i want to obtain tsai-wu failure criterian.I have only these properties:(1,2 or x,y are in plane 3 or z is out of plane) MODULUS: E1,E2,G12 STRENGHT: Xt,Xc,Yt,Yc,S POISON RATIO:NU12 but there are...
  3. alleak

    opening and flange dimension of a composite vessel

    Is there any standard for opening and flange dimension of a composite pressure vessel with nonmetalic liner. Cheers alleak
  4. alleak

    tsai-wu in a3d composite vessel

    I am analysing a 3d composite(carbon/epoxy) pressure vessel with ansys and i want to obtain tsai-wu failure criterian.I have only these properties:(1,2 or x,y are in plane 3 or z is out of plane) MODULUS: E1,E2,G12 STRENGHT: Xt,Xc,Yt,Yc,S POISON RATIO:NU12 but there are more properties required...
  5. alleak

    tsai-wu for a 3d composite vessel

    I am analysing a 3d composite(carbon/epoxy) pressure vessel with ansys and i want to obtain tsai-wu failure criterian.I have only these properties:(1,2 or x,y are in plane 3 or z is out of plane) MODULUS: E1,E2,G12 STRENGHT: Xt,Xc,Yt,Yc,S POISON RATIO:NU12 but there are more properties required...
  6. alleak

    filament wound structures layer thickness and fiber angle accuracy

    In filament wound structures such as pressure vessels what is the accuracy of layers thickness and fiber angles.for example can we say alayer is 1.1 mm thick and the fiber angle is 9.1 degrree or can we be more accurate like 1.11 and 9.12. Cheers alleak
  7. alleak

    z direction(out of plane)properties for composites

    For an ansys analysis i need to know z direction(out of plane)material properties of on filament wound carbon/epoxy composite.but in handbooks i saw only the properties in x,y&xy directions.how can i have these properties.any help would be appreciated. Cheers alleak
  8. alleak

    z direction(out of plane) material properties for composites

    Hi; I am analysing a 3D composite pressure vessel with ansys.I use shell 99 elements and want to know max. tsai-wu failure criterian.for material properties i have seen composite handbooks and there is only properties in directon 1,2 and 1-2 but there is not anything mentioned for direction 3.It...
  9. alleak

    Using ansys results for an external optimization

    I want to know how can i use ansys as a simulation tool for an external optimizer like matlab,a C program or anything else.can i use external optimizer inside ansys via user-defined optimization method.any help would be appreciated. Cheers alleak
  10. alleak

    Call an external FEM software from Matlab

    I want to know how can i call one FEM(like ansys)software from Matlab(optimization toolbar) and how can i make inputs and outputs beetween these two(making a loop until reaching the optimum result) Cheers alleak
  11. alleak

    making an automated optimization enviroment

    Hi; I am working on optimizaton of composite pressure vessels and currently on the stacking sequence optimization.I have two design variables(fiber angle & layer thickness)and I want to optimize the weight.I prefer to use genetic algorithm for optimization and ansys for simulation.I am seeking a...
  12. alleak

    making an automated optimization environment

    Hi; I am working on optimizaton of composite pressure vessels and currently on the stacking sequence optimization.I have two design variables(fiber angle & layer thickness)and I want to optimize the weight.I prefer to use genetic algorithm for optimization and ansys for simulation.I am seeking a...
  13. alleak

    making an automated optimization environment

    Hi; I am working on optimizaton of composite pressure vessels and currently on the stacking sequence optimization.I have two design variables(fiber angle & layer thickness)and I want to optimize the weight.I prefer to use genetic algorithm for optimization and ansys for simulation.I am seeking a...
  14. alleak

    Geodesic Dome

    Hi; I am working on layer optimization of composite pressure vessels with isotensoid filament winding.I am changing fiber angles and in each angle I optimize the thickness.since i want an isotensoid state it is necessary in each angle to change the opening of pressure vessel.so the dome geometry...
  15. alleak

    HDPE permeabilty

    Hi; I want to know what is the range of permeability of HDPE liners in CNG4 vessels in different pressures.is there any plots showing this.any help would be appreciated. thanks
  16. alleak

    CNG4 Opening & Flange

    Hi, Can anybody show me a standard in CNG4 Opening & Flange Dimensions. Thanks a lot
  17. alleak

    Filament Windig Machines Accuracy Range

    Hi; I Want to know what is the range of filament winding machines accuracy in fiber angles and layer thichness,for example +-0.01 deg ,+-0.01 mm or more. Thank You Very Much
  18. alleak

    Geodesic Dome in Pressure Vessels

    Hi; I am working on layer optimization of composite pressure vessels with isotensoid filament winding.I am changing fiber angles and in each angle I optimize the thickness.since i want an isotensoid state it is necessary in each angle to change the opening of pressure vessel.so the dome geometry...
  19. alleak

    CNG4 Opening & Flange Dimensions

    Hi, Can anybody show me a standard in CNG4 Opening & Flange Dimensions.There was not enough information in ISO11439
  20. alleak

    genetic algorithm in ansys

    hi, I want to know how can i use genetic algorithm in ansys.i am working on layer optimization of composites and i want to join ansys package with a genetic algorithm program. thanks

Part and Inventory Search

Back
Top