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MULTISCALE MECHANICAL BEHAVIORS IN DISCRETE MATERIALS: A REVIEW
被引:0
|作者:
Zheng, Xiaojing
[1
]
Wang, Dengming
[1
]
机构:
[1] Lanzhou Univ, Key Lab Mech Western Disaster & Environm, Minist Educ China, Lanzhou 730000, Peoples R China
基金:
中国国家自然科学基金;
关键词:
discrete material;
multiple space and time scales;
trans-scales correlation;
sand dune;
statistical analysis;
GRANULAR-MATERIALS;
CONSTITUTIVE RELATIONS;
MEDIA;
MODEL;
DEFORMATION;
SIMULATION;
PATTERNS;
SPHERES;
STRESS;
CLAYS;
D O I:
10.1016/S0894-9166(11)60005-0
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
The discrete material, which belongs to the category of soft materials, is one of the most prevalent forms of matter in nature and engineering fields. These materials often exhibit abundant and complex mechanical properties which are still far from being perfectly understood. From the view of multi-scale framework concentrated on the 'bridge' role in the macro-micro relation, this review mainly introduces some theoretical investigations of mechanical behaviors in discrete materials, including the continuum constitutive model based on the macroscopic phenomenological approach and coupled micro-macro approach, the statistical analysis of some microscopic physical quantities involved contacted forces between particles and its transmission within the whole system, and the statistical analysis for some microscopic processes in aeolian landform systems involving the grain-bed impact, the transportation and sedimentation of wind-blown sand flux, et al. Finally, some further worthwhile challenges in these fields are suggested.
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页码:579 / 591
页数:13
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