Finite Element Analysis of G-10 Flange/Board for the CC Feedthrough Box Page: 2 of 11
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April 3, 1990
Finite Element Analysis of G-10
Flange/Board for CC Feedthrough Box
The assembly of the stainless steel feedthrough box for the CC cryostat
resulted in distortion of the slotted plates through which the circuit boards
must be installed. Due to the o-ring grooves in the plates and the presence of
small pump out passages it is difficult to machine the surface flat after
installation. Installing the boards on the distorted surface requires distorting
the g-10 flange and the board which is glued to it to match the surface
distortion and achieve a seal. This results in stresses for which the epoxy bond
may not be adequate. The purpose of this work is to estimate the shear and
normal stresses in the two critical planes between the board and flange and
evaluate epoxy joint performance.
This work was requested by Sandor Feher, and is based on information
and drawings which he supplied.
G-10 Board and Flanme
The board and flange are shown in Fig. 1. The board is installed
asymmetrically in the flange relative to the flange longitudinal centerline. The
flange is split longitudinally on its centerline to recieve the board, then board
and flange are epoxied into a single unit.
The direction and assumed shape of the required distortion are indicated
in the figure. This distortion is based on surveyed measurements taken on the
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Wands, R. Finite Element Analysis of G-10 Flange/Board for the CC Feedthrough Box, report, April 16, 1990; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc831802/m1/2/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.