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This presentation compares calculations from the EJMA manual in Section 4.13 with NASTRAN results. Slides cover calculations for different thicknesses (t), widths (w), and loads (q). Data on coefficients used in calculations is also presented. The focus is on fatigue life estimation for combined axial and pressure loads. Refer to slide #2 for "St" values.
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EJMA vs. NASTRAN Calculations Used to check the Finite Element simulation
Results From Pressure and Axial Loads only Equations are from Section 4.13 of the EJMA manual Slides #3 and #4 present calculation for , t = .02, w = 1.095, q = 1.0 inches Slides #5 and #6 present calculation for , t = .025, w = 1.095, q = 1.0 inches Slides #7 and #8 present calculation for , t = .03, w = 1.095, q = 1.0 inches Slides #9 to #11 present data for various coefficients which are used in the above calculations.
EJMA Fatigue Life estimate for combined Axial and Pressure loads only See slide #2 for “St” values