{"title":"Coupled thermo-mechanical modeling of reflective cracking in flexible pavements","authors":"Mohammad Rahmani, Yong-Rak Kim","doi":"10.1016/j.ijsolstr.2024.113129","DOIUrl":null,"url":null,"abstract":"<div><div>This study presents a coupled thermo-mechanical finite element modeling to simulate the reflective cracking of flexible pavements. The method integrates principles from computational fracture mechanics, specifically focusing on the mixture-level fracture characteristics of bituminous materials, and links them with a structural-level model for the deformation and cracking of pavements. Recognizing the substantial impact of mechanical and environmental factors on pavement damage performance, this study considers time- and temperature-dependent deformations and fracture of bituminous mixtures. To address this, the finite element method incorporated with cohesive zone fracture was used to account for the viscoelastic properties and temperature-dependent fracture characteristics of the bituminous mixtures. The concept of multiphysics modeling is elucidated within this context. To assess the capability of the modeling approach and its sensitivity under varying pavement design variables and loading conditions, a total of 14 cases with varying mixture properties, pavement layer configurations, and loading conditions (i.e., thermal loading only and coupled thermal–mechanical loading) were considered. The computational modeling presented in this study has the scientific rigor to predict complex fracture of mixtures and pavements with promising modelling efficiency with a few laboratory tests. Model simulation results demonstrate the effects of mixture properties and their layer configurations, which implies that coupled multiphysics modeling such as herein can differentiate the pavement damage performance influenced by interactive design variables and loading conditions. The pavement failure process is intensified when thermal and mechanical loads are applied simultaneously.</div></div>","PeriodicalId":14311,"journal":{"name":"International Journal of Solids and Structures","volume":"308 ","pages":"Article 113129"},"PeriodicalIF":3.4000,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Solids and Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020768324004888","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
This study presents a coupled thermo-mechanical finite element modeling to simulate the reflective cracking of flexible pavements. The method integrates principles from computational fracture mechanics, specifically focusing on the mixture-level fracture characteristics of bituminous materials, and links them with a structural-level model for the deformation and cracking of pavements. Recognizing the substantial impact of mechanical and environmental factors on pavement damage performance, this study considers time- and temperature-dependent deformations and fracture of bituminous mixtures. To address this, the finite element method incorporated with cohesive zone fracture was used to account for the viscoelastic properties and temperature-dependent fracture characteristics of the bituminous mixtures. The concept of multiphysics modeling is elucidated within this context. To assess the capability of the modeling approach and its sensitivity under varying pavement design variables and loading conditions, a total of 14 cases with varying mixture properties, pavement layer configurations, and loading conditions (i.e., thermal loading only and coupled thermal–mechanical loading) were considered. The computational modeling presented in this study has the scientific rigor to predict complex fracture of mixtures and pavements with promising modelling efficiency with a few laboratory tests. Model simulation results demonstrate the effects of mixture properties and their layer configurations, which implies that coupled multiphysics modeling such as herein can differentiate the pavement damage performance influenced by interactive design variables and loading conditions. The pavement failure process is intensified when thermal and mechanical loads are applied simultaneously.
期刊介绍:
The International Journal of Solids and Structures has as its objective the publication and dissemination of original research in Mechanics of Solids and Structures as a field of Applied Science and Engineering. It fosters thus the exchange of ideas among workers in different parts of the world and also among workers who emphasize different aspects of the foundations and applications of the field.
Standing as it does at the cross-roads of Materials Science, Life Sciences, Mathematics, Physics and Engineering Design, the Mechanics of Solids and Structures is experiencing considerable growth as a result of recent technological advances. The Journal, by providing an international medium of communication, is encouraging this growth and is encompassing all aspects of the field from the more classical problems of structural analysis to mechanics of solids continually interacting with other media and including fracture, flow, wave propagation, heat transfer, thermal effects in solids, optimum design methods, model analysis, structural topology and numerical techniques. Interest extends to both inorganic and organic solids and structures.