American Society of Civil Engineers


Modified Schapery’s Model for Asphalt Sand


by Yong Ye, (Ph.D. Candidate, College of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China; and College of Civil and Hydroelectric Engineering, Three Gorges Univ., Yichang, Hubei 443002, China), Xinhua Yang, (corresponding author), (Professor, College of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China), and Chuanyao Chen, (Professor, College of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China)

Journal of Engineering Mechanics, Vol. 136, No. 4, April 2010, pp. 448-454, (doi:  http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0000092)

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Document type: Journal Paper
Abstract: Asphalt sand is described as a viscoelastoplastic materials. To involve elastic, viscoelastic, and viscoplastic strain components, a modified Schapery’s model is proposed through adding a viscoplastic term to the Schapery’s model with elastic and viscoelastic terms, and a strain-hardening model is used to describe viscoplastic behavior. A set of uniaxial compression tests, repeated and simple creep-recovery tests in different stress levels are performed to determine the stress-dependent parameters in the model. Finally, the model is validated by comparison with the results from the uniaxial creep experiments. Better agreement than the Schapery’s model indicates that the modified model is practicable to describe the mechanical behavior of asphalt sand in uniaxial compression.


ASCE Subject Headings:
Asphalts
Elastoplasticity
Models
Nonlinear response
Sand (material)
Viscoelasticity

Author Keywords:
Asphalt sand
Viscoelastoplasticity
Nonlinearity
Modified Schapery’s model