ladder development update results from sic 01 test profile from sic 03 mechanical properties of...
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![Page 1: Ladder development update Results from SiC 01 test Profile from SiC 03 Mechanical properties of foams](https://reader036.vdocument.in/reader036/viewer/2022083005/56649f1d5503460f94c33e72/html5/thumbnails/1.jpg)
Ladder development update
Results from SiC 01 test
Profile from SiC 03
Mechanical properties of foams
![Page 2: Ladder development update Results from SiC 01 test Profile from SiC 03 Mechanical properties of foams](https://reader036.vdocument.in/reader036/viewer/2022083005/56649f1d5503460f94c33e72/html5/thumbnails/2.jpg)
SiC 01- Sample Cool Down
•Sample cooled down down to -38oC over a period of 175min.•3 plots taken at -38 with 30min interval between each.•2 further plot taken at -40 with 15min gap.•Final plot taken when pressure was released (during this the temperature
changed from -38.3 to -37.2).
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SiC 01- Profile Plots
Top two plots show 2D profiles of SiC 01 at 21.3oC and -40.6oC.Bottom left plot is the difference between the two.
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SiC 01- Results Table
Time (min) Temp (oC) Max Z Displacement
(microns)
Min Z Displacement
(microns)
X co-ordinate for Max
(microns)
X co-ordinate for Min
(microns)
Magnitude of displacement
(microns)
0 21.3 4.50 -93.75 5000 133000 98.24
150 -35.2 4.23 -105.82 7000 135000 110.04
175 -38 3.99 -107.55 5000 135000 111.54
192 -38.5 3.93 -106.25 7000 135000 110.18
216 -38.3 4.23 -106.61 7000 135000 110.83
248 -40.5 3.81 -108.28 5000 133000 112.09
262 -40.6 3.90 -109.23 7000 135000 113.12
272 -38.3 -37.2 4.25 -111.56 7000 135000 115.85
Numbers high lighted in red where used in plots shown on the previous slide
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SiC 03
High spot at 568 microns due to dirt on the surface.Low spot comes from gap in the Si and the sensor picking up a signal from the Al sample holder. Z displacement magnitude approximately 500 micorns.
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SiC 03 - Glue pillars
LCD microscope output from laser shows difference between inner and outer glue pillars
Outer Edge Inner
Si as seen by laser microscope
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Basic model consists of interconnecting open celled cubes and, if structure isdominated by wall bending failure, then mechanical properties follow scale laws.For elastic modulus:
Constant of proportionality has been shown to be close to unity in experiment andnumerical simulation.Simon Canfer is now testing a selection of SiC and RVC to test thistheory. The full list of mechanical properties that can be determined are:1. Elastic modulus under compression2. Poisson's ratio under compression3. Flexural strength To test under tension will require making samples in different geometries.Thermal properties that can be tested are:1. Coefficient of thermal expansion2. Moisture absorption
Mechanical Properties of Foams
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E s∝ρ~
ρ s
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