4.4 Article

Multiscale numerical investigation of ratchet growth damage effects in PBX 9502

Related references

Note: Only part of the references are listed.
Article Computer Science, Interdisciplinary Applications

Data-driven modeling of granular matter?s elastic nonlinearity by volume constraint

E. C. Bryant et al.

Summary: Traditional analytic homogenization methods for granular micromechanics have limitations in predicting the effective Poisson's ratio, while a novel data-driven and volume-constrained homogenization method is proposed to resolve this problem. The new approach allows for a higher upper bound on Poisson's ratio and is designed to improve machine learning of effective moduli based on DEM simulations. Furthermore, the homogenization method is developed to capture the nonlinearity of glass bead packs and is exemplified in the training of a micromechanically-sensitive ICNN constitutive model.

COMPUTERS AND GEOTECHNICS (2023)

Article Engineering, Geological

Multiscale plasticity of geomaterials predicted via constrained optimization-based granular micromechanics

E. C. Bryant et al.

Summary: This paper proposes a general framework for deriving nonlinear elastic and elastoplastic material models from granular micromechanics. The framework introduces a constraint-based variational structure to classical grain contact-based homogenization methods of hyperelasticity. The framework defines closed-form hyperelastoplastic material models that extend multiscale variational methods to granular plasticity. The proposed framework is used to develop macroscopic models for different types of materials. Numerical examples and comparison to experimental measurements are provided to validate the models.

INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS (2022)

Article Chemistry, Applied

Multiscale investigation of the microstructural mechanisms driving ratchet growth in PBX 9502

J. D. Yeager et al.

Summary: Recent thermomechanical modeling methods have incorporated mesoscale information for PBX 9502 thermal cycling, revealing that ratchet growth is driven by microcracking. Greater ratchet growth was observed in virgin material.

JOURNAL OF ENERGETIC MATERIALS (2022)

Article Chemistry, Applied

Modeling Microstructural Effects on Heterogeneous Temperature Fields within Polycrystalline Explosives

N. Mohan et al.

Summary: This paper investigates the role of crystal anisotropy on the evolution of temperature fields in PBXs under weak shock conditions. Utilizing simplified idealizations of PBX microstructure and conducting numerous simulations, the study reveals correlations between crystal anisotropy, wave dynamics, crystal orientation, and microstructural neighborhood in heating of grains. The research finds that wave dispersion near the impact interface plays a dominant role in the temperature field, while individual crystal orientations beyond a certain distance also contribute significantly.

PROPELLANTS EXPLOSIVES PYROTECHNICS (2021)

Article Mathematics, Interdisciplinary Applications

Numerical analysis of flyer plate experiments in granite via the combined finite-discrete element method

Viet Chau et al.

COMPUTATIONAL PARTICLE MECHANICS (2020)

Article Mathematics, Interdisciplinary Applications

Simulation of mixed-mode fracture using the combined finite-discrete element method

S. Boyce et al.

COMPUTATIONAL PARTICLE MECHANICS (2020)

Article Mathematics, Interdisciplinary Applications

HOSS: an implementation of the combined finite-discrete element method

Earl E. Knight et al.

COMPUTATIONAL PARTICLE MECHANICS (2020)

Article Engineering, Geological

Simulation of Fracture Coalescence in Granite via the Combined Finite-Discrete Element Method

Bryan Euser et al.

ROCK MECHANICS AND ROCK ENGINEERING (2019)

Article Materials Science, Multidisciplinary

Model for ratchet growth in PBX 9502

R. B. Schwarz

ACTA MATERIALIA (2019)

Article Chemistry, Physical

Mesoscale Simulation to Study Constitutive Properties of TATB/F2314 PBX

Siyu Ge et al.

MATERIALS (2019)

Article Engineering, Mechanical

Cohesive finite element modeling of the delamination of HTPB binder and HMX crystals under tensile loading

David J. Walters et al.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2018)

Review Multidisciplinary Sciences

Fracture mechanics by three-dimensional crack-tip synchrotron X-ray microscopy

P. J. Withers

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (2015)

Article Engineering, Geological

Validation of a three-dimensional Finite-Discrete Element Method using experimental results of the Split Hopkinson Pressure Bar test

E. Rougier et al.

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES (2014)

Article Chemistry, Applied

The Effects of TATB Ratchet Growth on PBX 9502

Darla G. Thompson et al.

PROPELLANTS EXPLOSIVES PYROTECHNICS (2010)

Article Multidisciplinary Sciences

Quasi-static studies of the deformation and failure of PBX 9501

PJ Rae et al.

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (2002)