chris wowk mane 6970 master’s project. 4” nps flange/cover abaqus model developed multiple...
TRANSCRIPT
Effects of Analysis Method, Cover Plate Thickness, and Bolt
Preload on the Behavior of Bolted Flanges of Different
SizesStatus Report 1
Chris WowkMANE 6970
Master’s Project
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
Status
Preliminary FEA Analyses
1/8 (45° Segment) ABAQUS Model
(8 bolts)
Von Mises StressSpec Thicknesses & 2 lbf Preload
100x Deformation
Contact Pressure Only at OD of Cover/Flange
Contact Diameter Algorithm for Comparison to Analytic Solutions
𝐷𝑐𝑜𝑛𝑡𝑎𝑐𝑡=∑𝐶𝐹𝑜𝑟𝑐𝑒𝑛∗𝑟 𝑛
∑𝐶𝐹𝑜𝑟𝑐𝑒𝑛
Contact Forces and Location Extracted from
Path
Paths Along Bolt Center and in Between Bolts will be average
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
Flange Separation
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1-0.00050
0.00050.001
0.00150.002
0.00250.003
0.00350.004
0.0045
Flange Separation vs Bolt Preload(Spec Thickness Flanges)
1 lbf WP 25YS
80YS COPEN
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
Schedule Going Forward
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
References