A5024267376- Rock Mechanics and Modeling
- Concrete Properties and Behavior
- Innovative concrete reinforcement materials
- Concrete and Cement Materials Research
- Numerical methods in engineering
- Structural Response to Dynamic Loads
- Fluid Dynamics Simulations and Interactions
- High-Velocity Impact and Material Behavior
- Structural Behavior of Reinforced Concrete
- Grouting, Rheology, and Soil Mechanics
- Composite Material Mechanics
- Innovations in Concrete and Construction Materials
- Drilling and Well Engineering
- Fire effects on concrete materials
- Mechanical Behavior of Composites
- Geotechnical Engineering and Underground Structures
- Fatigue and fracture mechanics
- Hydraulic Fracturing and Reservoir Analysis
- Masonry and Concrete Structural Analysis
- Infrastructure Maintenance and Monitoring
- Concrete Corrosion and Durability
- Planetary Science and Exploration
- Advanced Mathematical Modeling in Engineering
- Dam Engineering and Safety
- Textile materials and evaluations
Northwestern University
2016-2025
ORCID
2021-2022
Merrill (United States)
2021
Engineering and Software System Solutions (United States)
2021
Los Alamos National Laboratory
2017
Politecnico di Milano
2003-2016
University of the West Indies
2016
Northwestern University
2016
Rensselaer Polytechnic Institute
2005-2013
The mechanical behavior of the mesostructure concrete is simulated by a three-dimensional lattice connecting centers aggregate particles. model can describe not only tensile cracking and continuous fracture but also nonlinear uniaxial, biaxial, triaxial response in compression, including postpeak softening strain localization. particle representing nodes are generated randomly, according to given grain size distribution, Delaunay triangulation used determine connections their effective...
The previously developed microprestress-solidification theory for concrete creep and shrinkage is generalized the effect of temperature (not exceeding 100°C). solidification model separates viscoelasticity solid constituent, cement gel, from chemical aging material caused by characterized growth volume fraction hydration products. This permits considering viscoelastic constituent as non-aging. dependence rates two transformed time variables based on activation energies creep. concept...
The lattice discrete particle model (LDPM) is a mesoscale for heterogeneous materials. Developed concrete, it simulates material mesostructure by modeling coarse aggregate particles and their surrounding mortar as polyhedral cells. A tetrahedralization of the centers generates framework where each member associated with triangular-shaped plane contact (facet) between two Compatibility equations are formulated describing deformation an assemblage through rigid-body kinematics. Equilibrium...
In Part I of this two-part study, a theory is provided for the extension lattice discrete particle model (LDPM) to include fiber reinforcing capability. The resulting model, LDPM-F, calibrated and validated in present paper by comparing numerical simulations with experimental data gathered from literature. analyzed experiments direct tension, confined unconfined compression, notched three-point bending tests.
Discrete models of solids have been motivated, in large part, by the discontinuous and heterogeneous nature material structure its breakdown under loading. The capabilities discrete evolved over past several decades, offering novel means for investigating structure–property relationships. However, lack understanding both utilities disadvantages limits their further development applications. This paper reviews relevant features approaches applied to modeling mechanical behavior geomaterials,...
Abstract In the standard fracture test specimens, crack-parallel normal stress is negligible. However, its effect can be strong, as revealed by a new type of experiment, briefly named gap test. It consists simple modification three-point-bend whose main idea to use plastic pads with near-perfect yield plateau generate constant compression and install end supports that closes only when yield. This way, beam transits from one statically determinate loading configuration another, making...
The concrete material model developed in the preceding Part I of this study is formulated numerically. new then verified by comparisons with experimental data for compressive and tensile uniaxial tests, biaxial triaxial as well notched tests mode fracture size effect.