[Oral Presentation]基于粘性颗粒材料铺粉工艺的颗粒流间歇性卡塞动力学研究

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

基于粘性颗粒材料铺粉工艺的颗粒流间歇性卡塞动力学研究

ID：182 Submission ID：6 View Protection：ATTENDEE Updated Time：2024-04-30 10:17:00 Hits：424 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

基于粘性颗粒材料的增材制造技术广泛应用于航空航天、汽车、能源等领域。作为增材制造中的关键一环，铺粉工艺和铺粉层的好坏对后续工艺过程和最终成型产品质量至关重要。本文基于作者近几年在增材制造铺粉方面的工作，从颗粒流间歇性卡塞动力学方面，较为系统性地研究了粘性颗粒材料铺粉动力学机制和铺粉层缺陷形成机理，主要包括：1）对粘性颗粒材料中单个颗粒的细观参数进行了实验测量和表征，如利用Drop test测量单个颗粒的黏附表面能，基于SEM图像重构颗粒形状；2）基于离散元数值模拟，分析了铺粉工艺参数、颗粒粘性和颗粒形状等对铺粉动力学和铺粉层质量的影响机理，并阐明了铺粉层缺陷的重要形成机制，即粘性颗粒在铺粉间隙区域的卡塞动力学行为；3）构建了一种新的能同时考虑颗粒塑性和粘性的线性碰撞模型，并揭示了颗粒塑性对粘性颗粒卡塞行为的作用机制；4）基于铺展实验结果，构建了粘性颗粒材料的间歇性卡塞流型图，给出了不同流型的发生条件，并建立了颗粒卡塞特征与不同种类缺陷间的内在联系，如图1所示。

Keywords

颗粒材料；粘性颗粒；颗粒卡塞；增材制造；离散元

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