Investigation of elastoplastic constitutive model of rubber-sand mixture

IF 5.3 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2024-11-13 DOI:10.1016/j.compgeo.2024.106904

Zhen-Dong Cui, Min-Zhe Xu, Xiao-Dong Wang

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引用次数: 0

Abstract

The rubber-sand mixture (RSM) has been extensively applied in the engineering construction as a lightweight filling material. However, the mechanical characteristics of RSMs are still not completely understood and the constitutive model used to simulate the RSMs by FEM analysis is also lacking. This study presents a newly developed constitutive model based on the critical state framework that describes the stress–strain relationship and dilatancy behavior of RSMs with different rubber contents. The relationship between rubber contents and critical state parameters was introduced in the established constitutive model. The comparisons of test results and model calculations show the RSM model can better capture the strain softening behavior, dilatancy characteristics and the critical state of RSMs. The RSM model was compiled by the user-defined material (UMAT) in ABAQUS and then utilized to simulate the triaxial tests. The developed RSM model is suitable for the triaxial compressive test using monotonic radial loading in triaxial space. The calculation results demonstrate the correctness and effectiveness of the developed model, which can be used as a reference in the engineering practice.

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橡胶-砂混合物弹塑性结构模型研究

橡胶砂混合物（RSM）作为一种轻质填充材料已被广泛应用于工程建设中。然而，人们对 RSM 的力学特性仍不完全了解，也缺乏用于通过有限元分析模拟 RSM 的构成模型。本研究基于临界状态框架提出了一种新开发的构成模型，用于描述不同橡胶含量的 RSM 的应力-应变关系和膨胀行为。在已建立的构成模型中引入了橡胶含量与临界状态参数之间的关系。试验结果和模型计算结果的比较表明，RSM 模型能更好地捕捉 RSM 的应变软化行为、膨胀特性和临界状态。RSM 模型由 ABAQUS 中的用户自定义材料（UMAT）编制，然后用于模拟三轴试验。所开发的 RSM 模型适用于在三轴空间中使用单调径向加载的三轴压缩试验。计算结果证明了所开发模型的正确性和有效性，可作为工程实践的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.