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Nonlocal Peridynamic Plasticity Model for the Dynamic Flow and Fracture of Concrete.

DE141159446

Publication Date	2014
Personal Author	Lammi, C. J.; Vogler, T. J.
Page Count	46
Abstract	A nonlocal, ordinary peridynamic constitutive model is formulated to numerically simulate the pressure-dependent flow and fracture of heterogeneous, quasi-brittle materials, such as concrete. Classical mechanics and traditional computational modeling methods do not accurately model the distributed fracture observed within this family of materials. The peridynamic horizon, or range of influence, provides a characteristic length to the continuum and limits localization of fracture. Scaling laws are derived to relate the parameters of peridynamic constitutive model to the parameters of the classical Drucker-Prager plasticity model. Thermodynamic analysis of associated and non-associated plastic flow is performed. An implicit integration algorithm is formu- lated to calculate the accumulated plastic bond extension and force state. The gov- erning equations are linearized and the simulation of the quasi-static compression of a cylinder is compared to the classical theory. A dissipation-based peridynamic bond failure criteria is implemented to model fracture and the splitting of a concrete cylinder is numerically simulated. Finally, calculation of the impact and spallation of a concrete structure is performed to assess the suitability of the material and failure models for simulating concrete during dynamic loadings. The peridynamic model is found to accurately simulate the inelastic deformation and fracture behavior of concrete during compression, splitting, and dynamically induced spall. The work expands the types of materials that can be modeled using peridynamics. A multi-scale methodology for simulating concrete to be used in conjunction with the plasticity model is presented. The work was funded by LDRD 158806.
Keywords	Concrete Fracture properties Microstructure Reinforced concrete Dowels Plastic properties Shear strength Quasi-static compression Concrete structure Thermodynamic analysis Methodology
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	50C - Construction Equipment, Materials, & Supplies 89G - Construction Materials, Components, & Equipment 71D - Ceramics, Refractories, & Glass
Corporate Authors	Sandia National Labs., Albuquerque, NM.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	201509
Contract Number	DE-AC04-94AL85000

Nonlocal Peridynamic Plasticity Model for the Dynamic Flow and Fracture of Concrete.

Nonlocal Peridynamic Plasticity Model for the Dynamic Flow and Fracture of Concrete.
DE141159446

Publication Date	2014
Personal Author	Lammi, C. J.; Vogler, T. J.
Page Count	46
Abstract	A nonlocal, ordinary peridynamic constitutive model is formulated to numerically simulate the pressure-dependent flow and fracture of heterogeneous, quasi-brittle materials, such as concrete. Classical mechanics and traditional computational modeling methods do not accurately model the distributed fracture observed within this family of materials. The peridynamic horizon, or range of influence, provides a characteristic length to the continuum and limits localization of fracture. Scaling laws are derived to relate the parameters of peridynamic constitutive model to the parameters of the classical Drucker-Prager plasticity model. Thermodynamic analysis of associated and non-associated plastic flow is performed. An implicit integration algorithm is formu- lated to calculate the accumulated plastic bond extension and force state. The gov- erning equations are linearized and the simulation of the quasi-static compression of a cylinder is compared to the classical theory. A dissipation-based peridynamic bond failure criteria is implemented to model fracture and the splitting of a concrete cylinder is numerically simulated. Finally, calculation of the impact and spallation of a concrete structure is performed to assess the suitability of the material and failure models for simulating concrete during dynamic loadings. The peridynamic model is found to accurately simulate the inelastic deformation and fracture behavior of concrete during compression, splitting, and dynamically induced spall. The work expands the types of materials that can be modeled using peridynamics. A multi-scale methodology for simulating concrete to be used in conjunction with the plasticity model is presented. The work was funded by LDRD 158806.
Keywords	Concrete Fracture properties Microstructure Reinforced concrete Dowels Plastic properties Shear strength Quasi-static compression Concrete structure Thermodynamic analysis Methodology
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	50C - Construction Equipment, Materials, & Supplies 89G - Construction Materials, Components, & Equipment 71D - Ceramics, Refractories, & Glass
Corporate Authors	Sandia National Labs., Albuquerque, NM.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	201509
Contract Number	DE-AC04-94AL85000