Fourier amplitude sensitivity test applied to dynamic combined finite-discrete element methods-based simulations
Abstract
Summary Fracture propagation plays a key role for a number of applications of interest to the scientific community, from dynamic fracture processes like spallation and fragmentation in metals to failure of ceramics, airplane wings, etc. Simulations of material deformation and fracture propagation rely on accurate knowledge of material characteristics such as material strength and the amount of energy being dissipated during the fracture process. Within the combined finite‐discrete element method (FDEM) framework material fracture behavior is typically described through a parametrized softening curve, which defines a stress‐strain relationship unique to each material. We apply the Fourier amplitude sensitivity test to explore how each of these parameters influences the simulated damage processes and to determine the key input parameters that have the most impact on the model response. We present several sensitivity numerical experiments for the simulation of a split Hopkinson pressure bar (SHPB) test for weathered granite samples using different combinations of model parameters. We validate the obtained results against SHPB experimental data. The experiments show that the model is mostly sensitive to parameters related to tensile and shear strengths, even in the presence of other parameter perturbations. The results suggest that the specification of tensile and shear strengths atmore »
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1481141
- Alternate Identifier(s):
- OSTI ID: 1484962
- Report Number(s):
- LA-UR-17-31209
Journal ID: ISSN 0363-9061
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal for Numerical and Analytical Methods in Geomechanics
- Additional Journal Information:
- Journal Volume: 43; Journal Issue: 1; Journal ID: ISSN 0363-9061
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Mathematics; Material Science; Fourier Amplitude Sensitivity Test, Finite-Discrete Element Method
Citation Formats
Godinez Vazquez, Humberto C., Rougier, Esteban, Osthus, David Allen, Lei, Zhou, Knight, Earl E., and Srinivasan, Gowri. Fourier amplitude sensitivity test applied to dynamic combined finite-discrete element methods-based simulations. United States: N. p., 2018.
Web. doi:10.1002/nag.2852.
Godinez Vazquez, Humberto C., Rougier, Esteban, Osthus, David Allen, Lei, Zhou, Knight, Earl E., & Srinivasan, Gowri. Fourier amplitude sensitivity test applied to dynamic combined finite-discrete element methods-based simulations. United States. https://doi.org/10.1002/nag.2852
Godinez Vazquez, Humberto C., Rougier, Esteban, Osthus, David Allen, Lei, Zhou, Knight, Earl E., and Srinivasan, Gowri. Wed .
"Fourier amplitude sensitivity test applied to dynamic combined finite-discrete element methods-based simulations". United States. https://doi.org/10.1002/nag.2852. https://www.osti.gov/servlets/purl/1481141.
@article{osti_1481141,
title = {Fourier amplitude sensitivity test applied to dynamic combined finite-discrete element methods-based simulations},
author = {Godinez Vazquez, Humberto C. and Rougier, Esteban and Osthus, David Allen and Lei, Zhou and Knight, Earl E. and Srinivasan, Gowri},
abstractNote = {Summary Fracture propagation plays a key role for a number of applications of interest to the scientific community, from dynamic fracture processes like spallation and fragmentation in metals to failure of ceramics, airplane wings, etc. Simulations of material deformation and fracture propagation rely on accurate knowledge of material characteristics such as material strength and the amount of energy being dissipated during the fracture process. Within the combined finite‐discrete element method (FDEM) framework material fracture behavior is typically described through a parametrized softening curve, which defines a stress‐strain relationship unique to each material. We apply the Fourier amplitude sensitivity test to explore how each of these parameters influences the simulated damage processes and to determine the key input parameters that have the most impact on the model response. We present several sensitivity numerical experiments for the simulation of a split Hopkinson pressure bar (SHPB) test for weathered granite samples using different combinations of model parameters. We validate the obtained results against SHPB experimental data. The experiments show that the model is mostly sensitive to parameters related to tensile and shear strengths, even in the presence of other parameter perturbations. The results suggest that the specification of tensile and shear strengths at the interfaces dominate the stress‐time history of the FDEM simulation of SHPB test.},
doi = {10.1002/nag.2852},
journal = {International Journal for Numerical and Analytical Methods in Geomechanics},
number = 1,
volume = 43,
place = {United States},
year = {Wed Aug 15 00:00:00 EDT 2018},
month = {Wed Aug 15 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
Development of a 3D Hybrid Finite-Discrete Element Simulator Based on GPGPU-Parallelized Computation for Modelling Rock Fracturing Under Quasi-Static and Dynamic Loading Conditions
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