Publication de 6 numéros par an
ISSN Imprimer: 1543-1649
ISSN En ligne: 1940-4352
Indexed in
A MULTISCALE MESH-FREE APPROACH TO MODELING DAMAGE OF AN ULTRA-HIGH-PERFORMANCE CONCRETE
RÉSUMÉ
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.
-
Sparks Paul A., Sherburn Jesse A., Heard William F., Williams Brett A., Penetration modeling of ultra‐high performance concrete using multiscale meshfree methods, International Journal for Numerical and Analytical Methods in Geomechanics, 43, 14, 2019. Crossref