[Oral Presentation]考虑颗粒破碎和状态依赖的粗粒土分数阶本构模型

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

考虑颗粒破碎和状态依赖的粗粒土分数阶本构模型

ID：189 Submission ID：18 View Protection：ATTENDEE Updated Time：2024-04-30 10:20:09 Hits：480 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

颗粒破碎和材料状态对堆石材料的剪胀、强度和应力-应变特性有很大影响，在本构模型中应合理考虑。虽然提出了一些分数阶模型来模拟堆石材料状态相关的本构行为，但忽略了颗粒破碎。以前提出了一个简单的分数阶模型，该模型考虑了颗粒破碎却忽略状态相关的本构关系，不能反映堆石材料的软化行为。因此，本文提出了一个考虑颗粒破碎和材料状态的分数阶本构模型，其中采用了Caputo分数导数。在所提出的模型中，通过考虑颗粒破碎指数和临界状态参数，建立了峰值应力比的通用公式，并使用包含颗粒破碎的剪胀关系来确定塑性流动方向。此外，通过引入Caputo分数导数推导了加载方向，并通过考虑颗粒破碎和材料状态建立了塑性模量。模拟了不同堆石材料的排水三轴试验结果，对所提出的模型进行了性能验证，可以观察到堆石材料应力应变和体积变化行为得到了准确的预测，包括塑性膨胀和收缩、应变硬化和峰后应变软化特征。

Keywords

粗粒土,颗粒破碎,状态依赖,分数阶

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics