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Title: An integrated EOS, pore‐crush, strength and damage model framework for near‐field ground‐shock

Journal Article · · International Journal for Numerical and Analytical Methods in Geomechanics
DOI: https://doi.org/10.1002/nag.3741 · OSTI ID:2337549
ORCiD logo [1];  [1];  [2];  [1]
  1. Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos New Mexico USA
  2. Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico USA

Abstract An integrated Equation of State (EOS) and strength/pore‐crush/damage model framework is provided for modeling near to source (near‐field) ground‐shock response, where large deformations and pressures necessitate coupling EOS with pressure‐dependent plastic yield and damage. Nonlinear pressure‐dependence of strength up to high‐pressures is combined with a Modified Cam‐Clay‐like cap‐plasticity model in a way to allow degradation of strength from pore‐crush damage, what we call the “Yp‐Cap” model. Nonlinear hardening under compaction allows modeling the crush‐out of pores in combination with a fully saturated EOS, that is, for modeling partially saturated ground‐shock response, where air‐filled voids crush. Attention is given to algorithmic clarity and efficiency of the provided model, and the model is employed in example numerical simulations, including finite element simulations of underground explosions to exemplify its robustness and utility.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2337549
Report Number(s):
LA-UR--23-34028
Journal Information:
International Journal for Numerical and Analytical Methods in Geomechanics, Journal Name: International Journal for Numerical and Analytical Methods in Geomechanics Journal Issue: 10 Vol. 48; ISSN 0363-9061
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

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