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Stress-strain hysteresis shape estimation of different soils using deformation-history integral (DHI) model

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Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut221-228
Sivumäärä8
JulkaisuMATERIALS PHYSICS AND MECHANICS
Vuosikerta44
Numero2
DOI - pysyväislinkit
TilaJulkaistu - 10 heinäkuuta 2020
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

Different soils show different nonlinear stress-strain patterns. Hence, it is difficult to come up with a general model to predict these shapes. This study investigated the suitability of the DHI model which was not originally formulated for geomaterials. This model was applied to different loading cycles of various types of soils and the model’s variables were optimized using nonlinear generalized reduced gradient (GRG) method. Up to five hysteresis springs were considered in the study. The computed error criteria indicated that the DHI model approximated the nonlinear hysteresis shapes appropriately and using three hysteresis springs presented the best estimation for almost all cases. In addition, this model approximated the initial loading cycles better than the final ones.

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