Constitutive modeling of a municipal solid waste considering the effects of creep and temperature using composite theory

Document Type : Article


1 Department of Civil Engineering, Iran University of Science & Technology, Tehran, Iran

2 Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran


In this paper, a constitutive model for the stress-strain response of municipal solid waste (MSW) is presented, considering the effects of temperature and aging. Our goal is to provide a model for predicting the behavior of these materials. The models used to predict the behavior of waste have used the theory of soils, and in this research, the theory of composite materials has been used for the first time. Cylindrical sample is modeled and loaded under triaxial loading conditions as observed in the experimental specimens. Fresh MSW, as a waste sample with a specific composition, was investigated. By using the optimization method, the constants of the given equation were obtained and the basic stress-strain model was presented based on the composite theory. The obtained results are compared with previous models' experimental data and results to verify the proposed model. At the strains of less than 30%, a good agreement can be reported between the numerical and experimental results. The root means square percentage of the relative error between the present model and the model of other researchers has shown acceptable results. It is also revealed that, as the temperature of the MSW increases, the stress on the waste is increased.


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