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|Title:||Investigation of ground shock effects in nonlinear hysteretic media. Report 1, Development of mathematical material models|
|Authors:||United States. Defense Atomic Support Agency.|
Baron, Melvin L.
|Keywords:||Hysteretic material models|
Elastic-plastic material models
Soil and rock models
|Publisher:||U.S. Army Engineer Waterways Experiment Station.|
Engineer Research and Development Center (U.S.)
Abstract: A historical outline of mathematical models used previously to represent soil and rock behavior in ground shock computations at low pressure levels is presented. The problems and deficiencies of these early approaches are discussed. Subsequently, two types of models are developed; one a plastic model in which the yield condition depends on the mean stress and in which different variable bulk moduli are used in loading and unloading. The second type of model, called the "variable bulk moduli model", has variable shear as well as moduli, but no explicit yield condition. The behavior of both types of model in uniaxial strain and triaxial compression tests is examined.
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