TY - JOUR
T1 - A displacement correlation method for stress intensity factor extraction from 3D fractures in anisotropic materials
AU - Mazurowski, B.
AU - O'Hara, P.
AU - Gupta, P.
AU - Duarte, C. A.
N1 - Funding Information:
Authors B. Mazurowski and C.A. Duarte gratefully acknowledge the partial support under contract number AF Sub OSU 60038238 provided by the Collaborative Center in Structural Sciences ( C2S2) at the Ohio State University, supported by the U.S. Air Force Research Laboratory.
Funding Information:
Authors B. Mazurowski and C.A. Duarte gratefully acknowledge the partial support under contract number AF Sub OSU 60038238 provided by the Collaborative Center in Structural Sciences ( ) at the Ohio State University, supported by the U.S. Air Force Research Laboratory.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12
Y1 - 2021/12
N2 - A numerical method to extract stress intensity factors (SIFs) from 3D fractures in anisotropic materials is presented. The formulation of a displacement correlation method that is valid for linear elastic materials with arbitrary symmetry in their elastic properties is given in detail. An algorithm for the numerical implementation of the method is also given. The methodology can take an approximate displacement field from any numerical method as input to the extraction process. However, to return accurate stress intensity factors an accurate numerical displacement field is required. In this work, this is provided by a Generalized Finite Element Method. Several verification problems show that the anisotropic displacement correlation method is robust and can extract accurate SIFs. The methodology is used in a parametric study of crack–crack interactions in a high-strength aluminum alloy to demonstrate a practical application. More than 200 simulations are run using the Generalized Finite Element Method, which are largely able to be scripted and ran without user intervention after one simulation is set up.
AB - A numerical method to extract stress intensity factors (SIFs) from 3D fractures in anisotropic materials is presented. The formulation of a displacement correlation method that is valid for linear elastic materials with arbitrary symmetry in their elastic properties is given in detail. An algorithm for the numerical implementation of the method is also given. The methodology can take an approximate displacement field from any numerical method as input to the extraction process. However, to return accurate stress intensity factors an accurate numerical displacement field is required. In this work, this is provided by a Generalized Finite Element Method. Several verification problems show that the anisotropic displacement correlation method is robust and can extract accurate SIFs. The methodology is used in a parametric study of crack–crack interactions in a high-strength aluminum alloy to demonstrate a practical application. More than 200 simulations are run using the Generalized Finite Element Method, which are largely able to be scripted and ran without user intervention after one simulation is set up.
KW - Anisotropic materials
KW - Displacement correlation method
KW - Extended finite element method
KW - Generalized Finite Element Method
KW - Stress intensity factor
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U2 - 10.1016/j.engfracmech.2021.108040
DO - 10.1016/j.engfracmech.2021.108040
M3 - Article
AN - SCOPUS:85117786784
SN - 0013-7944
VL - 258
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
M1 - 108040
ER -