[Oral Presentation]基于离散单元法的固体推进剂蠕变与应力松弛行为研究

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

基于离散单元法的固体推进剂蠕变与应力松弛行为研究

ID：100 Submission ID：24 View Protection：ATTENDEE Updated Time：2024-04-10 17:09:01 Hits：489 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

固体推进剂在长期储存过程中受重力载荷影响会发生蠕变失效。为了分析固体推进剂的蠕变特性，针对HTPB与NEPE两种固体推进剂，采用软化粘结模型建立三维离散元样本，基于率过程理论应用离散元方法模拟了两种样本的蠕变和应力松弛过程，并分析了率过程理论参数对蠕变行为的影响。模拟结果与已发表实验数据的比较验证了模型的有效性，且表明基于率过程理论的离散元接触模型可以模拟固体推进剂包括三级蠕变的所有蠕变阶段。此外,基于三级蠕变的发生点，提出了一种参数标定公式，可以提高离散元模拟的校准效率。本文的研究工作可为固体推进剂有效性评估提供依据和支撑。

Keywords

固体推进剂,蠕变失效,离散元方法,率过程理论,软化粘结模型

Speaker

潘宇

武汉大学

Submission Author

潘宇武汉大学

楚锡华武汉大学

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