Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Paul A. Wawrzynek"'
Publikováno v:
Environmental Science & Technology. 54:5783-5789
Oil/gas well integrity failures are a common but poorly constrained source of methane emissions to the atmosphere. As of 2014, Pennsylvania requires gas and oil well operators to report gas losses, both fugitive and process, from all active and unplu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::249d487883d18295df964782373e7316
https://doi.org/10.1021/acs.est.0c00863
https://doi.org/10.1021/acs.est.0c00863
Publikováno v:
Journal of the Mechanics and Physics of Solids. 127:221-238
Cracks propagation in brittle materials was framed into the theory of standard dissipative processes by several authors in many publications. Although the theoretical setting is sound, the derived crack tracking methods suffered from a major drawback
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ffd397f54e5832721dbe640c167dd0d
https://doi.org/10.1016/j.jmps.2019.03.014
https://doi.org/10.1016/j.jmps.2019.03.014
Autor:
A.L. Pilchak, Paul A. Wawrzynek, Richard G. Pettit, M. Velez, T.W. Ward, A.H. Rosenberger, B.J. Carter, Ripudaman Singh
Publikováno v:
Engineering Fracture Mechanics. 256:107992
Local crack growth properties within microstructural components are often anisotropic and difficult to measure, especially in materials like titanium alloys, that do not respond well to conventional, stress-ratio-based crack tip marking techniques. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06cdb9d87e7b26a909a354d640e5cc1f
https://doi.org/10.1016/j.engfracmech.2021.107992
https://doi.org/10.1016/j.engfracmech.2021.107992
Publikováno v:
Computer Methods in Applied Mechanics and Engineering. 315:550-583
The quasi-static propagation of fracture in brittle materials was studied in several recent publications. A variational formulation (Salvadori, 2008; Salvadori and Carini, 2011; Salvadori and Fantoni, 2013) led to three-dimensional crack tracking str
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fc5735ec21c8d0aad26979dd946f9d8
https://doi.org/10.1016/j.cma.2016.11.008
https://doi.org/10.1016/j.cma.2016.11.008
Autor:
Paul A. Wawrzynek, Creto Augusto Vidal, Markos O. Freitas, Luiz Fernando Martha, B.J. Carter, Anthony R. Ingraffea, Joaquim Bento Cavalcante-Neto
Publikováno v:
Engineering with Computers. 32:655-674
This work describes a technique to generate tetrahedral meshes with cracks using parallel computers with distributed memory. This technique can be used for models without cracks as well. It employs a binary partitioning structure that uses axis-align
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1afc34ac11921a8c471d7099699cbb1
https://doi.org/10.1007/s00366-016-0444-3
https://doi.org/10.1007/s00366-016-0444-3
Publikováno v:
Engineering Fracture Mechanics. 154:111-127
The energy-based growth formulation and accompanying simulation technique introduced in Part I of this series is generalized in this work to predict arbitrary, mixed-mode, non-planar crack evolution. The implementation uses a novel basis-function app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac8a1e639b8a100b4acedd679e6922f5
https://doi.org/10.1016/j.engfracmech.2015.12.033
https://doi.org/10.1016/j.engfracmech.2015.12.033
Autor:
Frans Palmert, David Gustafsson, Paul A. Wawrzynek, Christian Busse, Daniel Leidermark, Björn Sjödin
Publikováno v:
MATEC Web of Conferences, Vol 165, p 13012 (2018)
Single-crystal nickel-base superalloys are often used in the hot sections of gas turbines due to their good mechanical properties at high temperatures such as enhanced creep resistance. However, the anisotropic material properties of these materials
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c606afc095e3c5c77e5a27e342ea17e0
https://doaj.org/article/114e395217f34a26b3d75b526f9b7066
https://doaj.org/article/114e395217f34a26b3d75b526f9b7066
Publikováno v:
Engineering Fracture Mechanics. 131:382-405
A technique was implemented for decomposing 3-D mixed-mode energy release rates using the Virtual Crack Extension (VCE) method. The technique uses a symmetric/anti-symmetric approach to decompose local crack-front displacements that are substituted i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dde04541026748e68b11d8db9bc89ec
https://doi.org/10.1016/j.engfracmech.2014.08.014
https://doi.org/10.1016/j.engfracmech.2014.08.014
Publikováno v:
Engineering Fracture Mechanics. 120:26-42
The Park–Paulino–Roesler (PPR) potential-based model is a cohesive constitutive model formulated to be consistent under a high degree of mode-mixity. Herein, the PPR’s generalization to three-dimensions is detailed, its implementation in a fini
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f847274ee64dc18d2c7846fe1d6f67c2
https://doi.org/10.1016/j.engfracmech.2014.03.010
https://doi.org/10.1016/j.engfracmech.2014.03.010
Autor:
Krishnaswa Ravi-Chandar, Zhong Zhou, H. E. Fang, Dong Qian, J. Cruce, Marcus Rüter, M. Miraglia, Meng Luo, Amy Kathleen Kaczmarowski, Ken Nahshon, Yong Gan, Kristin Dion, Liang Xue, Devin T. O'Connor, Ali Ghahremaninezhad, Sheng Wei Chi, Jifeng Zhao, Pengfei Yang, Paul A. Wawrzynek, Zhen Chen, Jim Lua, Tingting Zhang, Erin Karasz, R. DeFrese, Steffen Brinckmann, Erdogan Madenci, Sharlotte Kramer, E. Yreux, Bahattin Kilic, Michael K. Neilsen, Anthony R. Ingraffea, Jiun-Shyan Chen, Andrew J. Gross, L. Quinkert, P. Liu, Theresa Elena Cordova, A. R. Cerrone, Brad L. Boyce, John M Emery, Jacob D. Hochhalter, Khalil I. Elkhodary, Shih-Po Lin, E. Fang, B.J. Carter, E. T. Moyer, M G Veilleux, S. Tang, Sagar Bhamare, Keunhwan Pack, Tomasz Wierzbicki, Xiong Zhang
Publikováno v:
Springer Netherlands
Existing and emerging methods in computational mechanics are rarely validated against problems with an unknown outcome. For this reason, Sandia National Laboratories, in partnership with US National Science Foundation and Naval Surface Warfare Center
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f80ee49d45a82de28d1ac0234b8b008
https://doi.org/10.1007/s10704-013-9904-6
https://doi.org/10.1007/s10704-013-9904-6