While doing a snapfit analysis in optistruct, I have given an enforced displacement to one component. While running it in simulation, both the components starts moving simultaneously

Anuj Nandal_21754
Anuj Nandal_21754 Altair Community Member
edited March 2022 in Community Q&A

Please refer to the file attached for reference. As it can be seen that the horizontal beam starts moving before coming in contact. Can someone please help regarding this.image

Welcome!

It looks like you're new here. Sign in or register to get started.

Answers

  • PaulAltair
    PaulAltair
    Altair Employee
    edited March 2022

    You are displaying the results in linear animation mode (so what you are seeing is a linear interpolation of the final state, not each state in 'time') you need to view in 'transient' mode to view the increments

    image

    When you view it that way, I don't get that with the model you attached. I get the opposite problem (yours on left below) it passes through visually, as you have set a clearance of 5.8mm on the contact, if I reset clearance to blank it looks better (mine on right), my fem and h3d attached

    image

  • Anuj Nandal_21754
    Anuj Nandal_21754 Altair Community Member
    edited March 2022

    You are displaying the results in linear animation mode (so what you are seeing is a linear interpolation of the final state, not each state in 'time') you need to view in 'transient' mode to view the increments

    image

    When you view it that way, I don't get that with the model you attached. I get the opposite problem (yours on left below) it passes through visually, as you have set a clearance of 5.8mm on the contact, if I reset clearance to blank it looks better (mine on right), my fem and h3d attached

    image

    Hey Paul, thanks for being quick with the response, really appreciate this. I just wanted to know if there was any way by which I could show a snap fit simulation through this. Because as of now even with your file, seems like the 2 component stick together, I wanted the horizontal beam to slide back to original position (like a snap fit). I did try increasing the enforced displacement, seems like it is diverging.

  • PaulAltair
    PaulAltair
    Altair Employee
    edited March 2022

    Hey Paul, thanks for being quick with the response, really appreciate this. I just wanted to know if there was any way by which I could show a snap fit simulation through this. Because as of now even with your file, seems like the 2 component stick together, I wanted the horizontal beam to slide back to original position (like a snap fit). I did try increasing the enforced displacement, seems like it is diverging.

    In the attached, run4 I switched contact to n2s and Consli, with a PCONT with small friction values and STEXP set (to better account for different stiffnesses during iterations) and increased the displacement to 28mm, that seems to work ok

    I tried adding in your plastic mat props (run5) and then it still gets stuck at the end, but I think that might just be down to coarseness of the mesh and the cantilever is plasticly deformed

Welcome!

It looks like you're new here. Sign in or register to get started.

Welcome!

It looks like you're new here. Sign in or register to get started.