Elastic-viscoplastic behaviors of polymer-blend geocell sheets:Numerical and experimental investigations  

作　　者：Yang Zhao Jianbin Chen Zheng Lu Jie Liu Abdollah Tabaroei Chuxuan Tang Yong Wang Lipeng Wu Bo Wang Hailin Yao 

机构地区：[1]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China [2]Wuhan Municipal Engineering Design&Research Institute Co.,Ltd.,Wuhan,430023,China [3]Hubei Key Laboratory of Geo-Environmental Engineering,Wuhan,430071,China [4]Xinjiang Transportation Planning Survey and Design Institute Co.,Ltd.,Urumqi,830006,China [5]Department of Civil Engineering,Eshragh Institute of Higher Education,Bojnourd,9415615473,Iran [6]University of Chinese Academy of Sciences,Beijing,100049,China [7]China Energy Engineering Gezhouba Rail Transit Construction Co.,Ltd.,Shenzhen,518116,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第10期4261-4271,共11页岩石力学与岩土工程学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42077262 and 42077261);the Research Fund Project of Xinjiang Transportation Planning Survey and Design Institute Co.,Ltd.(Grant No.KY2022042504).

摘　　要：Polymer-blend geocell sheets(PBGS)have been developed as substitute materials for manufacturing geocells.Various attempts have been made to test and predict the behaviors of commonly used geogrids,geotextiles,geomembranes,and geocells.However,the elastic-viscoplastic behaviors of novel-developed geocell sheets are still poorly understood.Therefore,this paper investigates the elastic-viscoplastic behaviors of PBGS to gain a comprehensive understanding of their mechanical properties.Furthermore,the tensile load-strain history under various loading conditions is simulated by numerical calculation for widespread utilization.To achieve this goal,monotonic loading tests,short-term creep and stress relaxation tests,and multi-load-path tests(also known as arbitrary loading history tests)are performed using a universal testing machine.The results are simulated using the nonlinear three-component(NLTC)model,which consists of three nonlinear components,i.e.a hypo-elastic component,a nonlinear inviscid component,and a nonlinear viscid component.The experimental and numerical results demonstrate that PBGS exhibit significant elastic-viscoplastic behavior that can be accurately predicted by the NLTC model.Moreover,the tensile strain rates significantly influence the tensile load,with higher strain rates resulting in increased tensile loads and more linear load-strain curves.Also,parametric analysis of the rheological characteristics reveals that the initial tensile strain rates have negligible impact on the results.The rate-sensitivity coefficient of PBGS is approximately 0.163,which falls within the typical range observed in most geosynthetics.

关 键 词：Polymer-blend geocell sheets Geosynthetics Elastic-viscoplastic behavior Numerical simulations Tensile load-strain response 

分 类 号：TE377[石油与天然气工程—油气田开发工程]