Modeling Unbound Granular Materials under Complex Stress Paths
Publication: Instrumentation, Testing, and Modeling of Soil and Rock Behavior
Abstract
Developing reliable and versatile constitutive models for geomaterials has been challenging tasks for nonlinear finite element analysis of geotechnical engineering systems. The fuzzy set plasticity theory has been developed to account for the nonlinear soil stress-strain response under complex stress paths. The theory in many ways resembles the bounding surface plasticity, where the plastic modulus is a function of the distance between the current and image stress states in the stress space. Based on the concept of fuzzy set theory in mathematics, a membership function whose value ranges from 1 and 0 is introduced in the Fuzzy Set Plasticity Theory to specify the plastic modulus at a given stress state. In this paper, the laboratory test results of hollow cylinder tests on Hostun sand from the CASE data base were selected to assess the fuzzy set plasticity model by simulating the sand behaviors under those complex stress paths.
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© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Artificial intelligence and machine learning
- Computer programming
- Computing in civil engineering
- Continuum mechanics
- Deformation (mechanics)
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Fuzzy logic
- Geomechanics
- Geotechnical engineering
- Geotechnical models
- Granular materials
- Materials engineering
- Models (by type)
- Nonlinear analysis
- Plasticity
- Soil mechanics
- Soil properties
- Soil stress
- Solid mechanics
- Stress (by type)
- Stress analysis
- Stress strain relations
- Structural analysis
- Structural engineering
- Structural mechanics
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