A shear hardening plasticity model with nonlinear shear strength criterion for municipal solid waste

2018 ◽  
Vol 104 ◽  
pp. 207-215 ◽  
Author(s):  
Xilin Lü ◽  
Dawei Xue ◽  
Maosong Huang ◽  
Keng-Wit Lim
Keyword(s):  
Shear Strength ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Strength Criterion ◽  
Plasticity Model ◽  
Shear Strength Criterion ◽  
Nonlinear Shear

scholarly journals A New Shear Strength Criterion for Rock Masses with Non-Persistent Discontinuities Considering the Nonlinear Progressive Failure Process

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4694
Author(s):  
Bowen Zheng ◽  
Shengwen Qi ◽  
Songfeng Guo ◽  
Xiaolin Huang ◽  
Ning Liang ◽  
...  
Keyword(s):  
Shear Strength ◽  
Friction Coefficient ◽  
Progressive Failure ◽  
Strength Criterion ◽  
Rock Masses ◽  
Basic Form ◽  
Shear Strength Criterion ◽  
Nonlinear Shear ◽  
New Criterion ◽  
Internal Friction Coefficient

The shear strength characteristics of rock masses containing non-persistent discontinuities are strongly affected by discontinuities and rock bridges. The linear Jennings criterion cannot reflect the nonlinear mechanical behavior during progressive failure of rock masses with non-persistent discontinuities. In this study, a new nonlinear shear strength criterion was developed. First of all, a series of shear test data about artificial rock mass samples were collected on the basis of the published literatures, and five types of samples were differentiated according to the positions of discontinuities. After that, a new nonlinear shear strength criterion was proposed by introducing two correction coefficients A and B into the basic form of the Jennings criterion, which could correct the weight of the cohesion and the internal friction coefficient of rock bridges respectively. Then, the new criterion was determined by fitting the basic form of the Jennings criterion with the laboratory data. It was found that the parameters A and B had a nonlinear exponential and negative exponential relation with the connectivity rate respectively. It indicated that both the cohesion and the internal friction coefficient estimated by the new criterion were superior to those estimated by the Jennings criterion. Compared with the linear Jennings criterion, the new nonlinear shear strength criterion had a better applicability.

Shear Strength of Municipal Solid Waste (MSW): Beyond the Raw Values of “Cohesion” and Friction Angles

2016 ◽  
Author(s):  
Jaime J. Díaz-Beltrán ◽  
Juan J. Iguarán-Fernández ◽  
Joan M. Larrahondo ◽  
Luis A. Jaramillo
Keyword(s):  
Shear Strength ◽  
Municipal Solid Waste ◽  
Solid Waste

Study on the Biodegradation Strength Properties for Municipal Solid Waste with Higher Content of Organic Matter

2011 ◽  
Vol 71-78 ◽  
pp. 918-922
Author(s):  
Zhen Ying Zhang ◽  
Da Zhi Wu
Keyword(s):  
Shear Stress ◽  
Organic Matter ◽  
Shear Strength ◽  
Municipal Solid Waste ◽  
Shear Strain ◽  
Solid Waste ◽  
Test Specimen ◽  
Influence Factor ◽  
Strength Properties ◽  
Strength Parameters

Basing on the new developed direct shear testing instrument, the biodegradation strength properties and strength parameters of municipal solid waste with higher content of organic matter have been studied. The municipal solid waste is divided into three parts: the material that is easy to be biodegraded, reinforced material that is difficult to be biodegraded and the incompressible solid waste material. The proportions of these three parts are 80%, 5% and 15%, respectively. A series of laboratory tests have been performed for different initial void ratios and different vertical pressures applied on the test specimen. Testing results show that the initial void ratio is the main influence factor for the biodegradation strength of the municipal solid waste, the relationship between the biodegradation shear stress and the shear strain is a strain hardening curve, the biodegradation shear stress gradually increases with the shear strain. Besides, the biodegradation shear strength shows a linear relationship to the vertical pressure applied on the test specimen, and it is in accordance with the law of coulomb. According to the testing results, the biodegradation shear strength parameters of municipal solid waste are obtained. The cohesion varies from 11.5 to 24.0kPa, and the internal friction angle varies from 8.3 to 29.0 degree.

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