p10505 cold pressure fusing ii performance review team fusion 5 7 2010 n.
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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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Presentation Transcript
introduction
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
Signal to Noise Ratios
  • S/N = µ/σ = Std Dev/Mean
slide5

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
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
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
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
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
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 design1
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
slide26

Representative 1.4° skew angle pressure pattern (U4)

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

slide27

Representative 1.9° skew angle pressure pattern (U16)

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

slide28

Representative 2.4° skew angle pressure pattern (U24)

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