Download - PS RAL – WP4 Meeting 2 May 2013
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Stave 130 DrawingsSummary of major dimensions, with a comment about
dimensioning datums and ANSYS layered elements.
PSRAL – WP4 Meeting
2 May 2013
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Stave Dimensions
Critical Dimensions:• Overall Length 1277• Width 120 (likely to change, hopefully narrower, due to modifications with hybrid) • SMC area 100 x 50• EOS at Z=0 to Silicon Edge 0.1mm• Start of Silicon from Z=1277.1 = 3.36• Module to Module Gap 0.46mm• Pitch of Modules 98mm
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Stave thicknesses
• Wirebond to Wirebond 7.88• ASIC to ASIC 6.18
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Stereo Side
• Pitch of Modules 98mm• EOS at Z=0 to Silicon Edge 0.102mm• Module to Module Gap 0.3817
All dimensions theoretical to show difference!
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Z=0 Gaps
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Dimensioning DatumsNOTE: The tape is not to be used as a datum. The tape will be positioned to a nominal accuracy in order for the wire bond pad to be ‘within tolerance’
Laser drilled hole in Z=0 locator foil.
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Thoughts about ANSYS carbon fibre modelling• ANSYS 14 has stopped ‘supporting’ certain elements.• There are 2 elements which can be used for layered analysis
• SHELL181• SOLID185
• ANSYS has a ‘Section’ menu, one of which is Shell, where you can construct a layup. This menu seems to work for solid as well as shell elements.
• It seems the layup can only be associated with 1 coordinate system.