Finite Element Analysis of Cone Penetration in Soil for Prediction of Hardpan Location

Non-linear finite element analysis of cone penetration in layered sandy loam soil – Considering precompression stress state

“…Influence of soil moisture on NSDL-AU. The relationship between the triaxial stress state and Proctor density curve as explained in [27] was used to modify the stress-strain relationship of NSDL-AU for various soil Table 1 Elastic parameters Young's modulus and Poisson's ratio functions of octahedral normal stress for Norfolk sandy loam soil [22]. 2), tabular values of the yield stress and equivalent plastic strain were prepared for the material hardening part of the soil model.…”

“…Some of the limitations could be associated with the problem of modeling soil deformation in layered media, assumptions of homogeneity of soils, availability of versatile soil constitutive models, and modeling of the soil-cone frictional interfaces. The finite element simulation of cone penetration in granular soil by [27] appeared to capture the behavior of cone penetration in layered soils. The finite element predicted magnitudes of the cone penetration resistance forces, however, were not in strong agreement with the experimentally measured cone penetration resistance forces values.…”

“…The finite element predicted magnitudes of the cone penetration resistance forces, however, were not in strong agreement with the experimentally measured cone penetration resistance forces values. The material property of the soil constitutive model used in our previous finite element analysis [27] may not have fully accounted for the soil mechanical behaviors that occur during cone penetration in a layered soil. Modeling cone penetration in a layered soil medium ought to include the soil compaction hardening, soil failure, and soil-cone friction properties.…”

“…This study is intended to further improve the finite element analysis of cone penetration in layered soil that was initially carried out by [27]. The proposed improvements are: (1) modification of the stress-strain relationships of the USDA-ARS National Soil Dynamics LaboratoryAuburn University (NSDL-AU) soil compaction model for different soil moisture contents using a relationship between the triaxial stress state and the Proctor density curve; (2) inclusion of the precompression stress state concept in the stress-strain relationships of the NSDL-AU soil compaction model; and (3) use of the angle of internal friction of the linear yield criterion of the Drucker-Prager model that accounted for the different initial bulk density conditions of the soil layers.…”

The Effect of Diameter on Dynamic Seabed Penetration

“…Penetration depth in the model was found to be dependent on soil properties and the cone resistances calculated through FE analysis showed agreement with empirical correlations based on cavity-expansion theory. In 2007, cone penetration of a Norfolk sandy loam soil that varied in soil moisture content and bulk density was modeled using ABAQUS to predict the location of the hardpan in the soil (Tekeste et al, 2007). The finite element analysis was found to predict the hardpan to be located at depths shallower than experimental results.…”