# Material Properties: Glass Fabric - Polyester

### Data Available:

• Thermal Conductivity (Helium, warp Direction)
• Thermal Conductivity (Nitrogen, Warp Direction)
• Thermal Conductivity (Nitrogen, normal direction)
• Linear Expansion (normal direction) - (Plot not available)
• Linear Expansion (warp direction) - (Plot not available)
 Thermal Conductivity (Helium, warp Direction) Thermal Conductivity (Nitrogen, Warp Direction) Thermal Conductivity (Nitrogen, normal direction) UNITS W/(m-K) W/(m-K) W/(m-K) a 689.532 -2141.58 2909.905 b -2543.63 4639.74 -8616.64 c 3967.067 -3249.405 10542.69 d -3400.366 51.72425 -6832.068 e 1731.725 1101.977 2475.328 f -524.309 -613.8563 -475.7 g 87.4249 141.1432 37.9003 h -6.19597 -12.3133 0 i 0 0 0 data range 38-300 80-300 84-300 equation range 18-300 60-300 70-300 curve fit % error relative to data 1 1 2
 Curve fit equation of the form: log10 y = a+b(log10T) + c(log10T) 2 + d(log10T) 3 + e(log10T) 4 + f(log10T) 5 + g(log10T) 6 + h(log10T) 7 + i(log10T) 8 Solves as: y = 10 a+b(log10T) + c(log10T) 2 + d(log10T) 3 + e(log10T) 4 + f(log10T) 5 + g(log10T) 6 + h(log10T) 7 + i(log10T) 8 Where: Coefficients a - i are summarized in the appropriate table and T is the temperature in K (x-axis), and y is the property to solve for.

See References

 Linear Expansion (normal direction) Linear Expansion (warp direction) .UNITS [(L-L293)/L293] x 105 unitless, eg. m/m [(L-L293)/L293] x 105 unitless, eg. m/m a -7.179E2 -3.0897E2 b -3.157E0 1.0245E0 c 5.251E-2 -2.9503E-3 d -1.947E-4 1.8323E-5 e 2.752E-7 -2.7013E-8 Tlow (K) NA NA f> NA NA data range (K) 80-293 80-293 equation range (K) 80-285 80-280 curve fit % error relative to data 2 2
 equation of the form: y = a + bT + cT 2 + dT 3 + eT 4 >T > Tlow y = f T < Tlow solves as expected: Where: Coefficients a-e are summarized in the appropriate table and T is the temperature in K (x-axis), and y is the property to solve for.

See References