[Oral Presentation]爆炸驱动颗粒散体材料的动态破碎研究

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

爆炸驱动颗粒散体材料的动态破碎研究

ID：212 Submission ID：330 View Protection：ATTENDEE Updated Time：2024-04-30 10:29:41 Hits：475 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

在中心爆炸载荷下，颗粒体系的破碎特性、强脉冲爆炸波的传播、应力传播的非均匀性以及单颗粒破碎强度的Weibull分布密切相关。通过试验发现，采用球形TNT为中心爆源，颗粒球壳中破碎的颗粒体积分数随当量比增加呈指数衰减规律。运用连续非连续数值方法(CDEM)，揭示了爆炸波在颗粒环壳内的传播衰减及外界面反射后的稀疏卸载过程。由于爆炸波的短脉冲特性，颗粒内部应力场处于非均衡状态，采用应力均衡状态下的Weibull分布会导致过高的破碎颗粒体积分数。因此，采用破坏波传播特征时间内的平均诱导应力作为颗粒破碎强度的指标，可以合理考虑加/卸载历史对颗粒破碎的影响。考虑应力传播的非均匀性，我们得到了颗粒破碎强度随比例距离变化的模型，与模拟结果一致。最后我们分别探讨了颗粒密度、粒径尺寸以及粒径分布对颗粒破碎的影响。

Keywords

爆炸载荷;,颗粒散体;,动态破碎;,实验研究；,FDEM；

Speaker

张传山

北京理工大学

Submission Author

张传山北京理工大学

薛琨北京理工大学

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