[Oral Presentation]剪切黏滑断层泥中剪切结构的形成

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

剪切黏滑断层泥中剪切结构的形成

ID：135 Submission ID：94 View Protection：ATTENDEE Updated Time：2024-04-10 17:17:14 Hits：387 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

断层芯具有随时间演化的层状结构。探究该层状结构形成的具体过程可以揭示断层的演化机制。本文采用包含可破碎断层泥颗粒的数值剪切断层展现剪切结构的演化，并采用颗粒物理量(如非仿射位移和局部颗粒温度)来描绘不同宏观阶段中断层泥的微观状态。模拟断层经历了四个阶段：I线性阶段，II屈服阶段，III不稳定黏滑阶段，和IV稳定黏滑阶段。塑性在线性阶段分布分散，而在屈服阶段开始在加载板附近聚集。然后，剪切局部化在不稳定黏滑阶段最强，而在稳定黏滑阶段变弱。在震间阶段，由于断层或者颗粒的几何形状，一些颗粒易于相互解锁并相对于彼此产生无震滑移。它们之间无震滑动的积累会导致动态破坏，产生的振动会激活断层泥，从而发生滑移事件。剪切带中的更加细小的颗粒尺寸使得剪切局部化更加剧烈。剪切结构的形成与板相对运动的状态密切相关。层状的断层芯可能是长期黏滑作用的结果。尽管断层泥已经由离散颗粒材料组成，但它在黏滑循环中的产生了和固体材料类似的破裂模式。

Keywords

剪切断层泥,黏滑,剪切结构,非仿射位移,局部颗粒温度

Speaker

代转

南方科技大学地球与空间科学系

Submission Author

代转南方科技大学地球与空间科学系

高科南方科技大学

尚俊龙格拉斯哥大学

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