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SSnell

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  1. What is the latest working script for this function? I believe I've found the latest script, but can't seem to make it work properly in 2017.2. Can the elements be given the 2-axis of a cylindrical system? Thank you
  2. Thanks for the Response, I understand that Abaqus has the *analytical_field capability for something close to this but I don't see support in hypermesh for this.
  3. I have a 2d mesh that I wish to apply prescribed velocities to during an explicit analysis. The nodes on the mesh need enforced velocites that are functions of their x & y positions, as well as time. Effectively meaning that every node needs it's own amplitude curve. For many nodes, is there an automated method of creating these curves and loads in hypermesh?
  4. Hi, Using Optistruct, Is it possible to define non linear materials for an inertia relief analysis? Thanks
  5. Hi & thanks, No I'm running it in nastran but can try optistruct if there is a useful tutorial thanks!
  6. Hi, I want to run a simple model from hypermesh using the nonlinear static nastran solver (106). I initially ran an inertia relief analysis then took the accelerations in the f06 file and applied them back into the model and placed a three -point constraint and they successfully saw no forces when i ran it in linear static analysis. My problem is that I don't know which param/control cards i need to use to set up the nonlinear material analysis once I've defined my material. Can someone point me at something that might have the answer? Thanks
  7. Hi, I know that people are aware of the bug where the radio buttons and the other buttons on the right of the lower tab area move to the right and off the screen/area. I go through phases of experiencing this bug, mainly occurring when rearranging the windows. I'm aware that deleting all of the hyperworks settings files will temporarily fix this but the problem usually just comes back again straight away, is there a particular setting in any of hyperworks files that can be altered to fix this issue so that I don't lose my previous settings? Thanks for any and all help! Sam
  8. Thanks, I found the problem in mine by trimming the surface into many, I was just wondering what most people's go-to solutions are.
  9. I was wondering what are the most common reasons for a surface failing to mesh using automesh? and what can be done about it? (I saw an FAQ post by Rahul about this but can't follow the link as it seemed to be broken... it was FAQ17 from aug/14)
  10. Hi, I'm working on a model that has two load cases acting on it with respective responses and constraints, one of them needs to have low deflection and isn't a problem, but the other needs to have deflection greater than X. meeting these 2 constraints in the free size optimization, while giving the solver a lot of freedom, isn't a problem. The problem is that I need the final layup/model to have no failure. so while the free size optimization thickens and focuses on bits to meet the first load case, I'm getting loads of failure due to the second. And because of what optistruct has done to the plies in the free size optimisation, I can't give it enough freedom to pass the sizing optimisation while meeting the failure constraint of 1 (tsai-wu) that I give it. I've tried varying my constraints in the free size to give it the opportunity to reinforce bits that might fail... Is there any sort of work-around at all to allow the free size optimization to constrain the failure? because this seems possible and would solve the problem. and if not, Is there a simple answer to why optistruct cant adhere to failure constraints in the free size optimisation? Thank you
  11. I am trying to analyse a model comprising of two carbon laminate shells either side of a tetrameshed solid rohacell core for some out of plane forces, I receive the error *** ERROR # 622 *** PLY 1 does not contain any valid plate elements referencing a PCOMPP card. I have made sure I've assigned the properties to the components, and they are shells so I can find any other suggestions. I've assigned the properties both directly and indirectly. Thanks
  12. SSnell

    error 622

    Moved post to Optistruct.
  13. Thanks for the DSIZE-CONST advice, The applied loads are out of plane and when analysing with the laminate set to Total it gives huge displacement perpendicular to the surface, Is there anywhere I can read/learn about this coupling effect to try and understand it? and maybe the best place to learn about analysing and optimizing models with a core in hypermesh? thanks
  14. I'm trying to mass optimize a model with various loadcases acting on it... I want the result to have a rohacell core of constant thickness throughout the centre of the entire panel (to be left alone during the optimization) so I have two questions regarding this, 1)how can the core be left at say 5mm and not split up and shuffled in the stack during free sizing? and 2) why do I get massive out of plane displacement when using the listed properties for a core material such as rohacell 71 and running an analysis? Thanks for any and all help!
  15. Thanks a lot for the reply, I'm using Tsai-Wu, the failure response is composite failure, and The upper bound for the constraint is 1. A work around for bond failure would more than answer my question. Thanks
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