The total strain, elastic plus plastic, was measured with strain gages on valve bodies with internal pressure that caused surface yielding. The correlation of the simulated maximum principal strain was compared to strain gage data. A mesh sensitivity study shows that in regions of large plastic strain, mesh elements are required that are an order of magnitude smaller than what is used for linear elastic stress analysis for the same structure. A local mesh refinement was adequate to resolve the local high strain values. Both the location and magnitude of the maximum strain changed with a local mesh refinement. The local mesh refinement requirement was consistent over several structures that were tested. The test and simulation work will be presented along with the mesh sensitivity study. Some results on using an energy stabilization technique to aid convergence will be presented in terms of the impact on the predicted plastic strain.
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ASME 2018 Pressure Vessels and Piping Conference
July 15–20, 2018
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5163-0
PROCEEDINGS PAPER
Local Mesh Refinement for Correlation of FEA Estimated Plastic Strain to Tests in Areas of High Plastic Strain Available to Purchase
Gregory Westwater,
Gregory Westwater
Emerson, Marshalltown, IA
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Christopher R. Johnson,
Christopher R. Johnson
Emerson, Marshalltown, IA
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J. Adin Mann, III
J. Adin Mann, III
Emerson, Marshalltown, IA
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Katharine Liu
Emerson, Wuqing, China
Emma Xiao
Emerson, Wuqing, China
Gregory Westwater
Emerson, Marshalltown, IA
Christopher R. Johnson
Emerson, Marshalltown, IA
J. Adin Mann, III
Emerson, Marshalltown, IA
Paper No:
PVP2018-84630, V03BT03A035; 5 pages
Published Online:
October 26, 2018
Citation
Liu, K, Xiao, E, Westwater, G, Johnson, CR, & Mann, JA, III. "Local Mesh Refinement for Correlation of FEA Estimated Plastic Strain to Tests in Areas of High Plastic Strain." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 3B: Design and Analysis. Prague, Czech Republic. July 15–20, 2018. V03BT03A035. ASME. https://doi.org/10.1115/PVP2018-84630
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