Deformation Characteristics of Granular Materials Subjected to Rapid, Repetitive Loading

摘要

The report presents the results of a study of the behavior of certain granular materials under repetitive triaxial stressing. Collaterally, the report also presents (1) the results of a literature search of research on stress repetition-deformation relationships of roadway materials and (2) a general review of the principles of material fatigue. The repetitive load tests indicated that (1) on the basis of total strain, the angular material, which was best according to static triaxial tests, suffered the greatest loss in performance, (2) on the basis of rebound strain, the rounded material showed the best performance and (3) only the soft material showed significant degradation. The author concludes that the most important facts gained from the study were: (1) The results of repetitive triaxial tests can be expressed quantitatively. (2) The density of a granular material may have a greater influence on repetitive loading behavior than either particle shape or particle hardness. (BPR abstract)