{"title":"A multifield discrete element model for concrete","authors":"Christian Flack, Dieter Dinkler","doi":"10.1007/s40571-024-00883-z","DOIUrl":null,"url":null,"abstract":"<div><p>A novel multifield modeling concept for concrete on the mesoscale is presented, based on the discrete element method (DEM) coupled with a pore-network model (PNM). This incorporates mechanical, thermal, and chemical fields. Spherical particles with realistic size distributions are employed to represent aggregates that are bonded together. The Voronoi tessellation is employed to generate the mechanical bonds, the thermal pipes, and the pore network. Process zones are introduced at each face of the Voronoi cells to handle chemical reactions as well as the interlink between mechanical and transport processes. A brief description and verification of each model component is provided. Finally, a coupled simulation of sulfate attack is conducted, demonstrating the capabilities of the presented model using a powerful tool for mesoscale investigations.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 2","pages":"1335 - 1347"},"PeriodicalIF":2.8000,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40571-024-00883-z.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computational Particle Mechanics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s40571-024-00883-z","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
A novel multifield modeling concept for concrete on the mesoscale is presented, based on the discrete element method (DEM) coupled with a pore-network model (PNM). This incorporates mechanical, thermal, and chemical fields. Spherical particles with realistic size distributions are employed to represent aggregates that are bonded together. The Voronoi tessellation is employed to generate the mechanical bonds, the thermal pipes, and the pore network. Process zones are introduced at each face of the Voronoi cells to handle chemical reactions as well as the interlink between mechanical and transport processes. A brief description and verification of each model component is provided. Finally, a coupled simulation of sulfate attack is conducted, demonstrating the capabilities of the presented model using a powerful tool for mesoscale investigations.
期刊介绍：
GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research.
SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including:
(a) Particles as a physical unit in granular media, particulate flows, plasmas, swarms, etc.,
(b) Particles representing material phases in continua at the meso-, micro-and nano-scale and
(c) Particles as a discretization unit in continua and discontinua in numerical methods such as
Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.
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