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mysterymesher

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About mysterymesher

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  1. I am attempting to model a part which is bolted to a skin (which is assumed rigid), for a static analysis in OptiStruct. I therefore believe I need to use the Interfaces tool to set up a No Penetration contact condition. I have modelled my skin as a separate component and set up my contact surfaces between my two component. I have then applied BC’s of 0DOF to the skin. However, whatever settings I choose within my Interfaces group, I cannot get the parts to behave representatively. While the skin stays “rigid” the other part either penetrates through the skin or does not move at all. I’m expecting the part to be touching the skin around the the bolt holes but hog between them as it’s under a compressive loading. I am using 2D shell elements as I am modelling composite part. I have been able to do similar techniques in Solidworks Simulation however I am having great difficulty applying that to Hyperworks. Please can somebody help explain where I am going wrong?! Many thanks
  2. I stiill haven’t managed to get anywhere with this. Does anyone have any suggestions please?
  3. Hi all, I've got myself into a bit of a problem meshing a 'composite' part. I'm investigating the use of continuous fiber reinforced 3D printing as part of a project at Uni, where I'm using the Markforged 3D printer to specify fiber orientation etc for max stiffness/minimum weight. I have successfully simulated my basic tensile tests in ABAQUS but I'm now looking to use OptiStruct to optimise the lay-up of my design, which is a printed joint connecting two tubes at 90-deg angle with a flanged base for mounting. The design is unconventional for composites, ie not a thin shell where 2D elements can be used. I've done a few of the Hyperworks composites tutorials but none are representative of my problem so I'm looking for guidance on the meshing of the part. Being 3D printed, it is manufactured layer by layer, meaning the fibers are all parallel to the base plane, but the part has a complex geometry with different wall thicknesses, tapers etc. I reviewed using midsurfaces but I couldn't make any real progress with it. I know you can use the MAT9 for 3D composites but will this still enable me to optimise the laminate layups? I was maybe thinking of breaking down my model into each part i.e. base, stiffener and joint? I'm looking forward to hearing what people say - I'm fairly new to Hyperworks but I'm really enjoying learning it!!
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