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ptc-14284101-Visitor
1-Visitor
October 26, 2007
Question

clarification of Analusis in Mechanica

  • October 26, 2007
  • 1 reply
  • 2144 views
1. can i control mesh size in mechanica?(is there any effect of aspect ratio on mesh),according to my knowledge, even if i control aspect ratio ,i am getting same results. 2.can i get reaction forces at constrained points? 3.i want to know about shell reaction force,(physical significance in software) In results window this option was given. if i give point constraints ,it is giving concentrated stress in results , is it correct?how it can be overcome. i hope best from u guys,

    1 reply

    A
    Anonymous
    October 26, 2007
    Venu, 1) Changing aspect ratio will effect the mesh size, however what you are looking for is a Wildfire 4.0 enhancement: http://www.ptc.com/appserver/wcms/relnotes/note.jsp?&im_dbkey=50957&icg_dbkey=826 2) Yes: After completing an analysis define a results window. Set Display Type to #Model and Quantity to #Reactions at Point Constraints. Constrained points will be labeled with corresponding reaction values. 3) This should help: http://www.ptc.com/cs/cs_25/howto/mst730/mst730.htm 4) Point constraints do give concentrated stress (singularity). Stress=Force/Area so if your area is zero (point constraint) Stress is very high (divide by zero). Try to constrain something with area to overcome this. There is a Wildfire 4.0 enhancement which will help: http://www.ptc.com/appserver/wcms/relnotes/note.jsp?&im_dbkey=50964&icg_dbkey=826 I hope this helps. Best Regards Andy
    P
    ptc-14284101-VisitorAuthor
    1-Visitor
    October 26, 2007
    Thank u Mr.Andrew there is little confusion in second question I considered model constraints for small area to avoid concentrated stress. generally we get stresses in results here i want reaction forces Regards Venu
    A
    Anonymous
    October 26, 2007
    Venu, You don't need to call me Mr. Andrew, Andy is just fine ! Your question asked for reaction forces at points, if it is an area you are constraining, then this should help: http://www.ptc.com/cs/cs_25/howto/mst903/mst903.htm If you cannot access this document, email me and I'll send it to you. Best Regards Andy
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