6533b7d6fe1ef96bd1265a4a
RESEARCH PRODUCT
A comparative molecular dynamics-phase-field modeling approach to brittle fracture
Bernd MarkertBernd MarkertYousef HeiderSandeep P. PatilCarlos Alberto Hernandez PadillaEduardo R. Cruz-chusubject
business.industryComputer scienceMechanical EngineeringComputational MechanicsGeneral Physics and AstronomyNew materials02 engineering and technologyStructural engineering021001 nanoscience & nanotechnologyCombined approachBiological materialsComputer Science ApplicationsCondensed Matter::Materials ScienceMolecular dynamics020303 mechanical engineering & transportsBrittleness0203 mechanical engineeringBrittle crackMechanics of MaterialsStatistical physics0210 nano-technologybusinessBrittle fracturedescription
Abstract In this work, a novel comparative method for highly brittle materials such as aragonite crystals is proposed, which provides an efficient and accurate in-sight understanding for multi-scale fracture modeling. In particular, physically-motivated molecular dynamics (MD) simulations are performed to model quasi-static brittle crack propagation on the nano-scale and followingly compared to macroscopic modeling of fracture using the phase-field modeling (PFM) technique. A link between the two modeling schemes is later proposed by deriving PFM parameters from the MD atomistic simulations. Thus, in this combined approach, MD simulations provide a more realistic meaning and physical estimation of the PFM parameters. The proposed computational approach, that encompasses mechanics on discrete and continuum levels, can assist multi-scale modeling and easing, for instance, the simulation of biological materials and the design of new materials.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-12-01 | Computer Methods in Applied Mechanics and Engineering |