TY - JOUR
T1 - Non-intrusive coupling of a 3-D Generalized Finite Element Method and Abaqus for the multiscale analysis of localized defects and structural features
AU - Li, H.
AU - O'Hara, P.
AU - Duarte, C. A.
N1 - Funding Information:
The authors gratefully acknowledge the contributions of collaborators at U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base. The authors would also like to thank Travis Fillmore from the United States Army Corps of Engineers for proposing the welded T-joint problem solved in Section 4.3 . The research funding under contract number AF Sub OSU 60038238 provided to H. Li and C.A. Duarte by the Collaborative Center in Structural Sciences (C 2 S 2 ) at the Ohio State University, supported by the U.S. Air Force Research Laboratory is also acknowledged.
Funding Information:
The authors gratefully acknowledge the contributions of collaborators at U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base. The authors would also like to thank Travis Fillmore from the United States Army Corps of Engineers for proposing the welded T-joint problem solved in Section 4.3. The research funding under contract number AF Sub OSU 60038238 provided to H. Li and C.A. Duarte by the Collaborative Center in Structural Sciences (C2S2) at the Ohio State University, supported by the U.S. Air Force Research Laboratory is also acknowledged.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - This paper presents a multiscale computational framework able to resolve localized defects and features such as cracks and welds in large structures. It couples Abaqus models and 3-D Generalized Finite Element (GFEM) discretizations enriched with numerically-defined functions – the GFEM with global-local enrichments (GFEMgl). The structural-scale problem is modeled in Abaqus using a coarse, 3-D mesh, suitable for capturing the global response of the structure. The GFEMgl is used to accurately model localized features of interest that are otherwise ignored by Abaqus models. The GFEMgl utilizes enrichment functions provided by the solution of, potentially multiple, local problems solved in parallel. The coupling between Abaqus and GFEMgl models is handled by the Iterative Global-Local method (IGL). The proposed multiscale framework – denoted by the acronym IGL-GFEMgl in this work – is non-intrusive in the sense that the interactions between Abaqus and the GFEMgl solver require no modifications of Abaqus or knowledge about its implementation of the FEM. Numerical examples of a specimen undergoing localized plasticity, a hat-stiffened panel with a large number of spot welds, and a T-joint structure subjected to mixed-mode fatigue crack propagation are presented to demonstrate the accuracy and applicability of the proposed framework. The results show that the IGL-GFEMgl can achieve nearly the same accuracy as a Direct Finite Element Analysis (DFEA) while leveraging methodologies and algorithms implemented in commercial and research software. Moreover, it is also shown that the user time spent on model preparation can be greatly reduced when dealing with complex problems.
AB - This paper presents a multiscale computational framework able to resolve localized defects and features such as cracks and welds in large structures. It couples Abaqus models and 3-D Generalized Finite Element (GFEM) discretizations enriched with numerically-defined functions – the GFEM with global-local enrichments (GFEMgl). The structural-scale problem is modeled in Abaqus using a coarse, 3-D mesh, suitable for capturing the global response of the structure. The GFEMgl is used to accurately model localized features of interest that are otherwise ignored by Abaqus models. The GFEMgl utilizes enrichment functions provided by the solution of, potentially multiple, local problems solved in parallel. The coupling between Abaqus and GFEMgl models is handled by the Iterative Global-Local method (IGL). The proposed multiscale framework – denoted by the acronym IGL-GFEMgl in this work – is non-intrusive in the sense that the interactions between Abaqus and the GFEMgl solver require no modifications of Abaqus or knowledge about its implementation of the FEM. Numerical examples of a specimen undergoing localized plasticity, a hat-stiffened panel with a large number of spot welds, and a T-joint structure subjected to mixed-mode fatigue crack propagation are presented to demonstrate the accuracy and applicability of the proposed framework. The results show that the IGL-GFEMgl can achieve nearly the same accuracy as a Direct Finite Element Analysis (DFEA) while leveraging methodologies and algorithms implemented in commercial and research software. Moreover, it is also shown that the user time spent on model preparation can be greatly reduced when dealing with complex problems.
KW - Co-simulation
KW - Extended FEM
KW - Generalized FEM
KW - Iterative global-local
KW - Multiscale
KW - Non-intrusive coupling
UR - http://www.scopus.com/inward/record.url?scp=85103662239&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85103662239&partnerID=8YFLogxK
U2 - 10.1016/j.finel.2021.103554
DO - 10.1016/j.finel.2021.103554
M3 - Article
AN - SCOPUS:85103662239
SN - 0168-874X
VL - 193
JO - Finite Elements in Analysis and Design
JF - Finite Elements in Analysis and Design
M1 - 103554
ER -