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Numerical simulations and predictive models of undrained penetration in soft soils

There are two aspects in this study: cylinder penetrations and XBP (Expendable
Bottom Penetrometer) interpretations. The cylinder studies firstly investigate the
relationship between the soil resisting force and penetration depth by a series of rateindependent
finite element analyses of pre-embedded penetration depths, and validate
the results by upper and lower bound solutions from classical plasticity theory.
Furthermore, strain rate effects are modeled by finite element simulations within a
framework of rate-dependent plasticity. With all forces acting on the cylinder estimated,
penetration depths are predicted from simple equations of motion for a single particle.
Comparisons to experimental results show reasonable agreement between model
predictions and measurements.
The XBP studies follow the same methodology in investigating the soil shearing
resistance as a function of penetration depth and velocity by finite element analyses.
With the measurements of time decelerations during penetration of the XBP, sediment
shear strength profile is inferred from a single particle kinetic model. The predictions
compare favorably with experimental measurements by vane shear tests.

Identiferoai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/2555
Date01 November 2005
CreatorsShi, Han
ContributorsAubeny, Charles P.
PublisherTexas A&M University
Source SetsTexas A and M University
Languageen_US
Detected LanguageEnglish
TypeBook, Thesis, Electronic Dissertation, text
Format1549325 bytes, electronic, application/pdf, born digital

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