@inproceedings{03012c7b7905446abcd0965f74f45b68,
title = "Finite Element Analysis of Nonlinear Elastic Behavior of Unbound Aggregate Materials Under Repeated Loading",
abstract = "During the analysis and design of flexible pavements, the nonlinear elastic behavior of unbound aggregate layers and subgrade soils is a crucial component for establishing proper material characterization. This paper presents a validation case study regarding the nonlinear elastic behavior of unbound aggregate specimens in repeated load triaxial testing. An advanced triaxial testing framework, the University of Illinois FastCell (UI-FastCell), was selected for this study considering its capability to conduct cycled independent stress from both axial and radial directions. In total, ten unbound aggregate materials were tested in the laboratory under varying repeated loading conditions. A newly developed 2D axisymmetric finite element method (FEM)-based analytical tool was used to simulate the nonlinear elastic behavior based on a secant modulus iteration scheme. A comparison of the resilient stress–strain curves between the experimental and simulation results showed good agreement. Based on the findings of this study, the advanced characterization of material nonlinearity was shown to be both necessary and practical by utilizing FEM-based analytical solutions for flexible pavements.",
keywords = "Aggregates, Finite element method, Nonlinear elasticity, Numerical analysis, Repeated load triaxial testing",
author = "Haohang Huang and Jiayi Luo and Qamhia, {Issam I.A.} and Erol Tutumluer and Tingle, {Jeb S.} and Gonzalez, {Carlos R.}",
note = "Funding Information: Acknowledgements This study was made possible through the financial support provided by The U.S. Army Engineer Research and Development Center (ERDC) of the United States Army Corps of Engineers (USACE). The contents of this paper reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the ERDC. This paper does not constitute a standard, specification, or regulation. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.; 4th International Conference on Transportation Geotechnics, ICTG 2021 ; Conference date: 23-05-2021 Through 26-05-2021",
year = "2022",
doi = "10.1007/978-3-030-77230-7_20",
language = "English (US)",
isbn = "9783030772291",
series = "Lecture Notes in Civil Engineering",
publisher = "Springer",
pages = "253--264",
editor = "Erol Tutumluer and Soheil Nazarian and Imad Al-Qadi and Qamhia, {Issam I.A.}",
booktitle = "Advances in Transportation Geotechnics IV - Proceedings of the 4th International Conference on Transportation Geotechnics",
address = "Germany",
}