Wet (Conditioned) Testing
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1
what is the first step in wet testing?
place puck in a vacuum chamber with water and subject to vacuum saturation (vacuum range is specified)
2
how much water needs to be around the TSR pucks in the vacuum chamber?
1" of water above and below the puck
3
how long do you vacuum the TSR puck for?
5-10 minutes
4
once you have vacuumed the puck, what must be done?
keep the puck submerged for 5-10 minutes
5
once the puck has been vacuumed and bulked for 5-10 min each, what are the steps to weighing the puck?
1. zero the scale with plastic wrap on it
2. Surface dry the puck (SSD)
3. place puck on balance
2. Surface dry the puck (SSD)
3. place puck on balance
6
after placing gyro on scale with plastic wrap, what must be done?
determine the degree of saturation
this is found by comparing bulked TSR weight to the indicated range
this is found by comparing bulked TSR weight to the indicated range
7
being lower than this % of saturation will require you to repeat the vacuum process?
70%
8
what changes about the vacuum process when saturation is less than 70%?
you may use a higher vacuum and a longer amount of time
9
being above what % saturation would require you to disreguard the puck?
> 80%
10
what is the saturation range for TSR pucks?
70-80%
11
if TSR saturation is within range, what can be done?
1. tighly wrap puck in plastic wrap
2. place sealed puck in plastic bag with 10 ml of water
3. seal bag and plae in freezer
2. place sealed puck in plastic bag with 10 ml of water
3. seal bag and plae in freezer
12
how long do plastic wrapped + bagged pucks stay in the freezer for?
16 hours
13
Once pucks have been frozen for 16 hours, what happens next?
1. remove the plastic wrap coating
2. put into hot bath for 24 +-1 hours
2. put into hot bath for 24 +-1 hours
14
after pucks have been placed into a hot water bath for 24 hours, what is the final step before testing?
place in warm-water bath for 2 hours +- 10 min
15
after pucks have been vacuumed, frozen, hot bathed and warm bathed
what is the final step?
what is the final step?
1. obtain wet (conditioned) test puck thickness (t')
2. test each puck in indirect tension and rexord max load for each
2. test each puck in indirect tension and rexord max load for each
16
what do you use indirect tension and max load for?
to calculate the tensile strength for each puck
17
after tensile strength has been calculated for each puck, what must be done?
calculate average tensile strength of all wet (conditoned) pucks
this is Sconditioned
this is Sconditioned
18
what is the final step of the TSR test overall?
using the average tensile strengths from Sdry and Sconditioned
you can calculate the TSR value with this formula
TSR = Sconditioned / Sdry * 100
you can calculate the TSR value with this formula
TSR = Sconditioned / Sdry * 100
19
where do you round to when doing TSRs?
the nearest whole number
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