[Oral Presentation]冲击载荷作用下凹形颗粒材料力学响应的数值研究

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

冲击载荷作用下凹形颗粒材料力学响应的数值研究

ID：131 Submission ID：83 View Protection：ATTENDEE Updated Time：2024-04-10 17:16:14 Hits：446 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

球谐函数是一种构建在球坐标系下的非规则颗粒模型，可通过改变形状参数N和A_nm生成不同长宽比与表面凹凸程度的真实颗粒形态。本文采用水平集方法将球谐函数颗粒离散为一组零水平集函数与空间水平集函数，简化了颗粒单元间多个接触点的计算复杂性，进而实现了对冲击载荷作用下凹形颗粒复杂力学特性的离散元数值模拟。研究表明：颗粒床的厚度和颗粒表面的凹凸程度对于降低床底冲击力的峰值起到了显著作用，而这些冲击力的峰值又会随着冲击速度的提高和颗粒球面度的增加而升高。与球形颗粒相比，凹形颗粒间的咬合互锁更有利于将冲击载荷向四周扩展，从而降低了圆筒底部所受的冲击荷载并获得更好的缓冲效果。数值研究结果将为凹形颗粒材料在缓冲防护等工业应用中的科学应用提供了理论依据。

Keywords

颗粒材料，离散元方法，水平集方法，球谐函数，缓冲特性

Speaker

刘芸松

本科生 大连理工大学

Submission Author

刘芸松大连理工大学

王嗣强大连理工大学

季顺迎大连理工大学

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