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The Motion Characteristics of Granular Assembly(粗粒材料的运动特征)
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报告名称

The Motion Characteristics of Granular Assembly

(粗粒材料的运动特征)

   

2019612日下午15:0017:00

   

地学楼二楼学术报告厅

主 讲 人

Dave. Chan(陈鸿钧)教授

主办单位

三峡库区地质灾害教育部重点实验室(三峡大学)

报告摘要

Debris flow consists of unsorted assembly of granular material of different particle sizes.  Debris flow is a type of granular flow in which interparticle friction dominate the flow characteristics. There are several approaches in analyzing debris flow which can be broadly classified into continuum and discontinuum approaches. The behavior of granular material in motion is different than that under static condition. The effect of particle inertia plays an increasing important role when particle velocity is increased. To understand the behavior of granular flow, numerical experiments have been carried out to explore the frictional and volumetric behavior of granular material.  With increase in particle velocity, particle inertia results in an increase in resistance against motion and, at the same time, a decrease in interparticle contacts which results in less frictional contribution to the overall resistance. Volumetric deformation is important in granular deformation under statics condition and it is equally important in granular flow. Physical experiment has been carried out on granular material in which vibration is applied after the material has been sheared statically. It is found that vibration results in volumetric compaction below the critical state volume which results in subsequent increase in shearing resistance of the material. In this seminar, the behavior of granular material under motion will be examined using numerical and physical experiments.

报告人简介

陈鸿钧教授为加拿大Alberta大学终身教授、土木与环境学院副院长、注册土木工程师,在岩土体材料的本构模型和计算机数值仿真方面开展了在国际上具有相当影响的独创性研究。自2011年受聘湖北省“百人计划”特聘教授以来,陈教授与三峡大学开展了广泛的交流,指导土木学院多名青年教师攻坚科学难题,并坚持每年为我校师生至少做一场学术报告,先后邀请了5位老师和13名研究生赴Alberta大学做学术访问,并接收了3名学生攻读博士学位。

 

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