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International Journal for Multiscale Computational Engineering
Impact-faktor: 1.016 5-jähriger Impact-Faktor: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Druckformat: 1543-1649
ISSN Online: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2018025518
pages 143-161

A MULTISCALE MESH-FREE APPROACH TO MODELING DAMAGE OF AN ULTRA-HIGH-PERFORMANCE CONCRETE

Jesse A. Sherburn
U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, USA
William F. Heard
U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, USA
Brett A. Williams
U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, USA
Paul A. Sparks
U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, USA

ABSTRAKT

A multiscale mesh-free formulation based on the reproducing kernel particle method (RKPM) is used to develop a damage model for ultra-high-performance concrete (UHPC). The damage evolution law is derived from the Helmholtz free energy, where the energy released from the cracked microstructure is equated to the homogenized macroscale response at the continuum level. In order to perform the microscale calculations for UHPC, the fracture energy of the UHPC must be determined. In this study, the fracture energy of a UHPC is experimentally determined by performing single-edge notched three-point beam tests. The fracture energy is required in order to perform physically based RKPM microscale calculations. The damage evolution law is then determined from the microscale calculations and applied to a quasi-static macroscale RKPM calculation. The multiscale framework is compared to a typical phenomenological damage model to show its ability to accurately reproduce softening behavior that exists under loading of a UHPC.


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