P10505 – Cold Pressure Fusing II Performance Review Team Fusion 5/7/2010

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P10505 – Cold Pressure Fusing II Performance Review Team Fusion 5/7/2010. Introduction. Two results are analyzed, standard deviation to indicate pressure uniformity and average pressure Presentation Outline Present data Justify ANOVA assumptions Analyze significant factors

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### P10505 – Cold Pressure Fusing IIPerformance ReviewTeam Fusion5/7/2010

Introduction
• Two results are analyzed, standard deviation to indicate pressure uniformity and average pressure
• Presentation Outline
• Present data
• Justify ANOVA assumptions
• Analyze significant factors
• Analyze interactions
• Conclusions
Signal to Noise Ratios
• S/N = µ/σ = Std Dev/Mean

Average Pressure vs. Skew Angle

Note: Standard deviation is not the analysis of variance between these average pressure data points. It is the analysis of pressure variations across the entire scan.

ANOVA Assumptions
• These assumptions must be justified to perform an Analysis of Variance.
• Normal distribution
• Constant variance
• Constant mean
• Independent data
ANOVA Table for Standard Deviation

Legend

Green: P-value < 0.005

Orange: P-value < 0.015

White: P-value > 0.010

ANOVA Table for Average Pressure

Legend

Green: P-value < 0.005

Yellow: P-value < 0.010

Orange: P-value < 0.015

White: P-value > 0.010

Conclusions
• Abaqus model was on target
• Experimental results point to 1.91° as the optimal skew angle to maximize pressure uniformity
• The average pressure value changes based on the configuration, but several configurations fell in the acceptable pressure range
Optimal Design
• Standard Deviation
• Main Effects: 1.9 deg, portrait, 130 lbs, k=270
• 2nd Order Effects: 1.9 deg, portrait, 170 lbs, k = 270
Optimal Design
• Average Pressure
• Main Effects:
• Load is variable but ~140 lbs,
• Orientation is variable, no specified preference
• Compliance is variable but ~415 lbs/in, by interpolation
• Interaction effects agree with main effects, except landscape orientation is preferred
• P-value for the average pressure DOE is 0.105
• P-value for the standard deviation DOE is 0.000

Representative 1.4° skew angle pressure pattern (U4)

1.4° skew angle, k = 270 lb/in (gray), 170 lbs load, landscape

Representative 1.9° skew angle pressure pattern (U16)

1.9° skew angle, k = 270 lb/in (gray), 170 lbs load, landscape

Representative 2.4° skew angle pressure pattern (U24)

1.9° skew angle, k = 270 lb/in (gray), 170 lbs load, landscape