Chris Wowk MANE 6970 Master’s Project

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Presentation transcript:

Chris Wowk MANE 6970 Master’s Project Effects of Analysis Method, Cover Plate Thickness, and Bolt Preload on the Behavior of Bolted Flanges of Different Sizes Status Report 1 Chris Wowk MANE 6970 Master’s Project

Status 4” NPS Flange/Cover ABAQUS Model Developed Multiple Preload & Cover Thickness Models Successfully Run Mesh Optimized for Contact Recognition Post-processing Algorithms for Determining Average Contact Diameter and Flange Separation Developed Analytical Flange Behavior Models in Process Results will determine actual DOE FEA runs

Preliminary FEA Analyses Von Mises Stress Spec Thicknesses & 2 lbf Preload 100x Deformation 1/8 (45° Segment) ABAQUS Model (8 bolts) Contact Pressure Only at OD of Cover/Flange

Contact Diameter Algorithm for Comparison to Analytic Solutions 𝐷 𝑐𝑜𝑛𝑡𝑎𝑐𝑡 = 𝐶𝐹𝑜𝑟𝑐 𝑒 𝑛 ∗ 𝑟 𝑛 𝐶𝐹𝑜𝑟𝑐 𝑒 𝑛 Contact Forces and Location Extracted from Path Paths Along Bolt Center and in Between Bolts will be average

Flange Separation Algorithm for Deterring Flange Separation Along the Radius Developed and Working Results Agree with Theory COPEN can also be used should Flange separation calculation method for analytic models still needs development

Schedule Going Forward 3/12 – First Progress Report Presentation 3/19 – Preliminary Background/Introduction and Theory/Methodology Section Complete 4/2 – All Analysis Complete. Second Progress Report 4/16 – Final Report Draft 4/30 – Prelim Final Report 5/14 – Final Report

References ASME Boiler and Pressure Vessel Code Galai, Hichem, and Bouzid, A.H, Analytical Modeling of Flat Face Flanges with Metal to Metal Contact Beyond the Bolt Circle, Journal of Pressure Vessel Technology, ASME, Vol 132. December 2010 Schneider, R. W, and Waters, E. O, The Background of ASME Code Case 1828: A Simplifying Model of Analyzing Part B Flanges, Journal of Pressure Vessel Technology, ASME, Vol. 100, No. 2, May 1978