All data from the lab is seen below:

Surface Condition	Group 1 (Nina, Joseph, & Jason)	Group 2 (Jenny, Adrixx, & Brian)	Group 3 (Enner & Erica)	Group 4 (Yabayanze, Tim, & Alban)	Group 5 (Ngoc, Saurabh, & Everett)	Group 6 (Andy & Eduardo)
As-received (N=12)	9	9	9	9	9	9
8	9	5	6	6	6
Ground with 600-grit SiC paper (N=12)	1	8	5	9	6	9
1	9	6	5	9	9
Ground with 240-grit SiC paper (N=12)	6	9	5	6	9	8
1	5	5	9	9	8

Required

Table 1: Fracture force values (in lb-force) versus the surface condition of 6\" long Pyrex glass rods from Groups 1-6.

Table 2: Fracture strength values (in MPa) versus the surface condition of 6\" long Pyrex glass rods from Groups 1-6.

Table 3: Mean & theoretical fracture strength values (in MPa) versus the surface condition of 6\" long Pyrex glass rods from Groups 1-6.

Table 4: Flaw size values (in m) versus the surface condition of 6\" long Pyrex glass rods from Groups 1-6.

Figure 1: Fracture strength (in MPa) vs. flaw size values (in m) versus the surface condition of 6\" long Pyrex glass rods from Groups 1-6.

Figure 2: Weibull plot of fracture strength (in MPa) versus the surface condition of 6\" long Pyrex glass rods from Groups 1-6.

3 design stress values based on a 1% failure rate of Pyrex glass rods in the as-received condition, the 600-grit surface condition, and 240-grit surface condition.

Corning Pyrex 7740 Glass

Glass Type: Borosilicate

Description

Pyrex 7740 is Cornings trade name borosilicate glass. It has a low coefficient of thermal expansion and good heat shock resistance. Pyrex can be used as a substitute for SCHOTT Borofloat in most cases. SGP can CNC mill, drill, cut, lap, and polish Pyrex to any dimension, shape or surface finish.

Thermal Properties	Mechanical Properties
Thermal Coefficient of Expansion	(0/300C): 32.5 X 10-7/C	Density	2.23 g/cm3 (at 20C/68F)
Annealing Point	560C/1040 F	Knoop Hardness	448 kg/mm2
Softening Point	821C/1509.8F	Youngs Modulus	64 G pa
Strain Point	510C / 950 F	Poissons Ratio	0.20

Chemical Properties	Electrical Properties
Hydrolytic Resistance	class 1	Dielectric Constant	E=4.61 MHz R.T.
Acid Resistance	class 1	Resistivity	8 X 1010 ohm/cm @R.T.
Alkali Resistance	class 2	Dielectric Strength	0.5 KV/mm

Optical Properties
Refractive Index	1.473 (589.3 nm)