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: *

  1. john84

    Composite Modeling

    Ok I got the procedure. It is not feasible to get stress strain curve of the laminate from Abaqus if I model it as 2D and have stress strain curve of individual constituents? Thanks.
  2. john84

    Composite Modeling

    Thanks Brian... Well Determining the ply properties would be calculating the elastic modulus and Poisson's ratio at +60 and -60 by micro-mechanics theory and then inputting those values in the abaqus composite lay up(2D shell elements) module right?
  3. john84

    Composite Modeling

    @ Brian Thanks for your comments. I want to create matrix first and then the fibers and then assemble them together. I want to obtain the inplane elastic modulus of the laminate. Is there any way that I can model it as a 2D with the desired fiber volume fraction? I have several fiber volume...
  4. john84

    Composite Modeling

    How do I model [0/+60/-60] laminate in 3D with a fiber volume fraction of 21%? I want to evaluate its mechanical properties (Elastic modulus)? Do I have to use transformation relations for [+60/-60] laminas? Thanks in advance!!
  5. john84

    Stress strain curve beyond yield point

    Thanks Portliner for your comments. I am defining the equivalent stress and the plastic strain of one of the material (since the other material is brittle) under plasticity option. While postprocessing, since the model is 3D, the sum of reaction forces divided by the cross sectional area would...
  6. john84

    Stress strain curve beyond yield point

    Do I have to use deformation plasticity for that?
  7. john84

    Stress strain curve beyond yield point

    Hello, I have a composite material, I want to obtain its stress strain curve beyond the elastic region, how do I do that? Thanks.
  8. john84

    Elastic Plastic Analysis

    Brian, Thanks for your valuable comments, you referred to applying max load, how do I scale the max load,is it that the load at yield point from the true stress strain curve of the matrix material is the max load, or its the UTS? Coz while performing a nonlinear analysis yield stress and...
  9. john84

    Elastic Plastic Analysis

    Brian, I also would like to clarify a stupid question, since I have two materials to form a composite, do I have to insert the plasticity data of the fibers (Since fibers are brittle and their stress strain curve would be a straight line, mostly brittle materials are defined by their ultimate...
  10. john84

    Elastic Plastic Analysis

    I am working on elastic plastic analysis of a composite material unit cell and would like to obtain a stress strain curve. I have defined true stress strain curve for matrix when defining the plastic properties. I am applying a pressure loading. How do I obtain a stress strain curve of the...
  11. john84

    Composite analysis

    Thank you very much Woongbi for your valuable comments. I would like to know more about how do I adjust fiber/matrix properties?
  12. john84

    Composite analysis

    Hello, I have a composite material (Matrix and random glass fibers) unit cell(3D), I want to get the stress vs strain curve of the composite material. For that I have inserted the elastic and plastic properties(true stress and true plastic strain)of matrix, and elastic properties of fibers...
  13. john84

    Defining plasticity

    Hi, I have a stress vs strain curve of a material and want to define a elastic plastic model. From the curve, I filled in the values of yield stress and plastic strain. Since the analysis is nonlinear, I will have to define the load with respect to time i.e. time dependent load (history...

Part and Inventory Search

Back
Top