Numerical modelling of a field soil desiccation test using a cohesive fracture model with Voronoi tessellations

被引：20
|
作者：
Gui, Y. L. [1 ,2 ]
Hu, W. [2 ]
Zhao, Z. Y. [3 ]
Zhu, X. [2 ]
机构：
[1] Newcastle Univ, Sch Civil Engn & Geosci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[2] Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
[3] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore
来源：
ACTA GEOTECHNICA | 2018年 / 13卷 / 01期
关键词：
Cohesive fracture model; Elastic-plastic-fracture model; Fracture energy; Numerical modelling; Soil desiccation test; ARBITRARY EVOLVING CRACKS; FINITE-ELEMENT-METHOD; MESHFREE METHOD; CLAYEY SOILS; PARTITION; UNITY; PROPAGATION; SHRINKAGE; ALGORITHM; GROWTH;
D O I：
10.1007/s11440-017-0558-9
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Numerical modelling of a field soil desiccation test is performed using a hybrid continuum-discrete element method with a mix-mode cohesive fracture model and Voronoi tessellation grain assemblages. The fracture model considers material strength and contact stiffness degradation in both normal and tangential directions of an interface. It is found that the model can reasonably reproduce the special features of the field soil desiccation, such as curling and sub-horizontal crack. In addition, three significant factors controlling field desiccation cracking, fracture energy, grain heterogeneity and grain size are identified.
引用
收藏
页码：87 / 102
页数：16
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