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Recent content by Jeremy1989

  1. Jeremy1989

    Difference in Von Mises Results Between Beam Model and 3D Model

    Hi, I am trying to study the difference between the static structural results of a 3D model and Beam model. I used a simple I beam example whereby one end of the beam is fixed support and the other end is a load downwards 100kN. When I compared the max von mises stress between both models, the...
  2. Jeremy1989

    Shear buckling of Web

    Hi all, thanks for the advice. To rb1957 - yes I would like to find out the impact of a mass which is to be mounted on the web.
  3. Jeremy1989

    Shear buckling of Web

    Hi all, I hope someone could point me to the right direction for my queries below. I am not a structural engineer myself: I understand that shear force exerted on a web could induce buckling load on it and also induce compressive load on the stiffener. I also understand that there are...
  4. Jeremy1989

    Coupled Nodes??

    With kinematic coupling constraints, it ran into warnings of nodes with inactive dofs. These nodes are those nodes that are both kinematically constrained and with X Symmetry nodes imposed. But at the same time, I cannot ignore either one. It ran into a lot of undercuts as well, as such, I...
  5. Jeremy1989

    Coupled Nodes??

    I see. If I get you correctly, all the nodes on that plane will be moving together with the same Y-displacement but could have different X and Z displacements. This should keep the plane to be planar and parallel to the symmetry plane, which is what I wanted it to be. I have uploaded the...
  6. Jeremy1989

    Coupled Nodes??

    I constrained the U2 degree of freedom, I believe that's the Y direction. Sorry, I didn't come across the term 'poissoning'. What does that mean? Like poisson effect? How do you enable it? Appreciate much, thank you.
  7. Jeremy1989

    Coupled Nodes??

    For equation, I selected the all the nodes on the plane except one and named them as a set 'slave nodes'. Then I select the unselected node as 'master node'. Then I go under interaction and select Equation. For slave nodes, I used a coefficient of -1 and for master node, I used a coefficient of...
  8. Jeremy1989

    Coupled Nodes??

    What is the difference between using equation and kinematic coupling constraint? I tried both (assuming I am doing it correctly). Equation allows me to run to completion but the results seem weird. But when I tried kinematic coupling constraint, it ran into warnings. Thank you
  9. Jeremy1989

    Coupled Nodes??

    Hello. I am doing an analysis of an electronic chip undergoing thermal cycles. I am using a slice model of the chip and there is a particular boundary condition that I do not know how to apply in ABAQUS. I want to make sure that a plane that is opposite the symmetry plane to remain parallel...
  10. Jeremy1989

    Need some help in setting boundary conditions in Abaqus

    Thanks rstupplebeen for your reply, but what does a reference point mean? Can I set it in the center of the plane? Thank you
  11. Jeremy1989

    Need some help in setting boundary conditions in Abaqus

    Thanks sdebock for your reply Sorry maybe I am not clear in my problem. Let's say I want a particular plane surface called A, to be able to move in the y direction, but I want that surface to remain planar when moving in the y direction. I think I should be using kinematic coupling...
  12. Jeremy1989

    Need some help in setting boundary conditions in Abaqus

    Apology for the broken link, this one should work http://i46.tinypic.com/25uk3li.pnghttp://i46.tinypic.com/25uk3li.png
  13. Jeremy1989

    Need some help in setting boundary conditions in Abaqus

    Hi everyone, Hope someone can help me on this. I am trying to model a slice model of an electronic chip that is undergoing thermal fatigue. As this has been done frequently by researchers, I came across a lot of paper which state how they set the boundary condition of the chip. You can refer...
  14. Jeremy1989

    How to create a simple solid cone shape?

    Hi all, A simple question: How do you create a cone shape in abaqus? As far as I know, we can use a the loft shape, but I don't know how to do so. Would greatly appreciate any help Thank you
  15. Jeremy1989

    Modeling of thermal expansion of flip chip

    Hi all, I am new to Abaqus and I hope someone can help me with an issue. Basically I am doing a 2D analysis of the flip chip undergoing thermal fatigue (-40 degrees C to 125 degrees C). Below is the material property data that I want to input for my underfill. CTE1: 37.15 CTE2: 117.8...
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