ps ral – wp4 meeting 2 may 2013

Stave 130 DrawingsSummary of major dimensions, with a comment about

dimensioning datums and ANSYS layered elements.

PSRAL – WP4 Meeting

2 May 2013

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

Stave thicknesses

• Wirebond to Wirebond 7.88• ASIC to ASIC 6.18

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!

Z=0 Gaps

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.

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.