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Mirror Backing Material
The material property index in this case is given by ( ρ3 /E) 0.5 . Here, it is evident that the material with the lowest value of the index will be the best for the design; accordingly, from the table below, CFRP comes out as the best choice.
Material |
E GPa |
ρ Mg/m3 |
ρ3 /E |
Steel |
200 |
7.8 |
1.54 |
Concrete |
47 |
2.5 |
0.56 |
Al |
69 |
2.7 |
0.53 |
Glass |
69 |
2.5 |
0.48 |
GFRP |
40 |
2.0 |
0.45 |
Wood |
12 |
.6 |
0.13 |
PU |
.06 |
.1 |
0.13 |
CFRP |
270 |
1.5 |
0.11 |
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