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Simhypo-sand：一种用于颗粒材料的简单细观模型及光滑粒子流体动力学实现

Simhypo-sand: a simple hypoplastic model for granular materials and SPH implementation.

作者信息

Wang Shun, Fang Hong-Jie, Kang Xuan, Li Dian-Qing, Wu Wei

机构信息

State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, China.

School of Water Resources and Hydropower Engineering, Institute of Engineering Risk and Disaster Prevention, Wuhan University, Wuhan, China.

出版信息

Acta Geotech. 2024;19(7):4533-4555. doi: 10.1007/s11440-024-02350-8. Epub 2024 May 31.

DOI:10.1007/s11440-024-02350-8
PMID:39055347
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11271348/
Abstract

This paper introduces a new hypoplastic model characterized by a simple and elegant formulation. It requires only 7 material parameters to depict salient mechanical behaviors of granular materials. The numerical implementation employs an explicit integration method, enhanced by a best-fit stress correction algorithm in a smoothed particle hydrodynamics code. The performance of this model in capturing soil behavior across a range of scenarios is demonstrated by conducting various numerical tests, including triaxial and simple shear at low strain rates, as well as granular collapse, rigid penetration and landslide process at high strain rates.

摘要

本文介绍了一种具有简单而优雅公式的新型亚塑性模型。它仅需7个材料参数就能描述颗粒材料的显著力学行为。数值实现采用显式积分方法，并在光滑粒子流体动力学代码中通过最佳拟合应力校正算法进行了增强。通过进行各种数值试验，包括低应变率下的三轴试验和简单剪切试验，以及高应变率下的颗粒坍塌、刚性侵入和滑坡过程，证明了该模型在一系列场景中捕捉土体行为的性能。

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