Modeling Resilient Modulus of Unbound Granular Materials under Repeated Loading

2009 ◽  
Author(s):  
Cheng Chen ◽  
Louis Ge ◽  
Jia Sheng Zhang
Keyword(s):  
Granular Materials ◽  
Resilient Modulus ◽  
Repeated Loading ◽  
Unbound Granular Materials

Packing theory-based framework for evaluating resilient modulus of unbound granular materials

2013 ◽  
Vol 15 (8) ◽  
pp. 689-697 ◽  
Author(s):  
Tatek Fekadu Yideti ◽  
Bjorn Birgisson ◽  
Denis Jelagin ◽  
Alvaro Guarin
Keyword(s):  
Granular Materials ◽  
Resilient Modulus ◽  
Unbound Granular Materials

scholarly journals Resilient modulus for unbound granular materials and subgrade soils in Egypt

2017 ◽  
Vol 120 ◽  
pp. 06009 ◽  
Author(s):  
Rabah Mousa ◽  
Alaa Gabr ◽  
Mohamed G. Arab ◽  
Abdelhalim Azam ◽  
Sherif El-Badawy
Keyword(s):  
Granular Materials ◽  
Resilient Modulus ◽  
Subgrade Soils ◽  
Unbound Granular Materials

Influences on Permanent Deformation Behavior of Unbound Granular Materials

1996 ◽  
Vol 1547 (1) ◽  
pp. 68-75 ◽  
Author(s):  
Fredrick Lekarp ◽  
Ian Reginald Richardson ◽  
Andrew Dawson
Keyword(s):  
Granular Materials ◽  
Stress Level ◽  
Deformation Behavior ◽  
Permanent Deformation ◽  
Repeated Loading ◽  
Permanent Strain ◽  
Unbound Granular Materials ◽  
Failure Line ◽  
Static Failure ◽  
French Model

The results of a research program aimed at characterizing the permanent deformation behaviors of different types of unbound aggregates under repeated loading are summarized. Tests were performed in a triaxial or hollow-cylinder apparatus, depending on the grading of the materials. The scope of the research was to assess the relationship between total permanent axial strain and both the number of load applications and the stress level. The test results were used to verify a model recently developed in France in which attempts are made to predict the long-term behaviors of granular materials. The French model is examined with particular reference to its validity on the effect of stress level on permanent deformation of unbound granular materials. The results of the study indicate that the French model is generally successful in predicting the permanent strain for a given number of load applications. For one of the materials, however, the model did not seem to fit the data well. The French model also suggests that the variation in total permanent strain with stress level is related to the static failure line and could be determined by comparing the maximum shear stress ratio with the slope of the estimated failure line. This is discussed and shown to be questionable because it results in either unreasonable failure parameters or a very low level of correlation with the observations. An attempt was made to modify the French model, but that also proved to be unsuccessful. The concept of relating the permanent deformation behavior to the static failure condition of the material is therefore questioned.

scholarly journals Influence of Degree of Saturation (DOS) on Dynamic Behavior of Unbound Granular Materials

Geosciences ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 89
Author(s):  
Junyu Sun ◽  
Erwin Oh ◽  
Dominic Ek-Leong Ong
Keyword(s):  
Plastic Strain ◽  
Granular Materials ◽  
Dynamic Behavior ◽  
Resilient Modulus ◽  
Heavy Traffic ◽  
Degree Of Saturation ◽  
Unit Weight ◽  
Unbound Granular Materials ◽  
Traffic Volumes ◽  
Number Of Cycles

The extensive application of natural unbound granular materials (UGMs) motivates studies into the mechanical properties of alternatives such as processed crushed rocks employed commonly as base or subbase layers. The rutting and settlement generated in base and subbase layers is widely restricted in many specifications and standards. In this research, the dynamic behavior including the resilient modulus (Mr) and the plastic strain (εεp) of the crushed rocks collected from Queensland in Australia will be tested by a series of repeated load triaxial test (RLT) tests to investigate the behavior of UGMs under the fluctuation of the degree of saturation (DOS) (59%–100%). In particular, the RLT specimens were prepared in the laboratory through proper gradation under optimum moisture content (OMC) and 100% standard proctor maximum dry unit weight. Results from the RLT tests showed that UGM specimens soaked at higher DOS generated lower resilient modulus and weaker resistance to heavy traffic volumes with significant accumulation of plastic strain. The Mr and εεp of the tested aggregates under different cyclic deviator stresses of 425 kPa and 625 kPa approximately linearly decreased and approximately linearly increased as the DOS increased with a certain number of cycles up to 50,000, respectively.

Sign in / Sign up

Export Citation Format

Share Document