Measurements of distorsions of single 0-90-0 C-C staves.
Measurements done in the mechanical workshop of Genoa with the DEA metrology
station.
November/December 2000
The staves are kept in horizontal position
by 3 devices (two at the endpoints and one in the middle of the stave)
which measure the vertical loads (shown in the pictures). In the
middle point the staves are blocked by means of the project support (see
the project), at the endpoind had-hoc clamps keep the stave in local
horizontal position. The measurement reference system
has the origin at the baricentre of the stave, the x-axis is along the
stave, the z-axis is vertical upward positive ; the units are: mm,
module
plane number and degree. The residuals shown in the 3rd plot
( see stave1, stave2a, stave3) are in blue for measurements along
the middle line of the stave ( about at y ~0) and red for
the measurments near the stave border ( y = +10. and y=-10.). The
bad planarity of the central plane is effect of the central support.
Stave-1(ps)
measured at T=20 0C, 36 measurements per module plane;
Stave
2
measured with heaters at temperatures
ranging between -10 0C and +20 0C
Stave-2a(ps)
measured at T=20 0C,
36 measurements per module plane;
Stave-3(ps)
measured at T=20 0C,
36 measurements per module plane;
Stave-b4(ps)
measured at T=20 0C,
with and without constrains
Stave-5(ps)
measured at T=20 0C, with and without constrains
Stave-6(ps)
measured at T=20 0C, with and without constrains