Steady-state constitutive relationship for idealised asphalt mixes

被引：57
|
作者：
Deshpande, VS [1 ]
Cebon, D [1 ]
机构：
[1] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England
来源：
MECHANICS OF MATERIALS | 1999年 / 31卷 / 04期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1016/S0167-6636(99)00004-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A constitutive model for the steady-state deformation of idealised asphalt mixes is developed with the long term view to understanding the permanent deformation (nutting) of flexible pavements under vehicle loads. Triaxial compression tests are conducted on idealised asphalt mixes. Both volumetric and deviatoric strains are measured. The specimens are observed to dilate under compressive stresses and the deformation behaviour is seen to be dependent on the mean as well as the deviatoric stresses. A simple model for the overall steady-state behaviour of idealised mixes is developed using a "shear box" analogy from soil mechanics and theories for the deformation of nonlinear viscous composites. This constitutive relationship is dependent on the mean as well as deviatoric stresses and accounts for the dilation of the mixes under compressive loading. Predictions of the model are found to agree well with experimental measurements. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：271 / 287
页数：17
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