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Visualization of three-dimensional d...

Liu, Jinyuan.

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Visualization of three-dimensional deformations using transparent "soil" models.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Visualization of three-dimensional deformations using transparent "soil" models./
Author:	Liu, Jinyuan.
Description:	201 p.
Notes:	Adviser: Magued G. Iskander.
Contained By:	Dissertation Abstracts International63-12B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3073677
ISBN:	0493936327

Visualization of three-dimensional deformations using transparent "soil" models.
Liu, Jinyuan.

Visualization of three-dimensional deformations using transparent "soil" models. - 201 p.

Adviser: Magued G. Iskander.

Thesis (Ph.D.)--Polytechnic University, 2003.

The fundamental premise of this research is that transparent synthetic materials with geotechnical properties similar to those of soils can be used to study 3-D deformation and flow problems in natural soils. Transparent soils are made of either silica gel or silica powder and a pore fluid with a matching refractive index. Two families of transparent soils were developed. The first family, made from silica gel, was used to model sands. The second family was made from silica powder to model clays.

ISBN: 0493936327Subjects--Topical Terms:

783781
Engineering, Civil.

Visualization of three-dimensional deformations using transparent "soil" models.
LDR:03360nam 2200325 a 45 001 934998
005 20110509
008 110509s2003 eng d
020 $a 0493936327
035 $a (UnM)AAI3073677
035 $a AAI3073677
040 $a UnM $c UnM
100 1 $a Liu, Jinyuan. $3 1258692
245 1 0 $a Visualization of three-dimensional deformations using transparent "soil" models.
300 $a 201 p.
500 $a Adviser: Magued G. Iskander.
500 $a Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 5985.
502 $a Thesis (Ph.D.)--Polytechnic University, 2003.
520 $a The fundamental premise of this research is that transparent synthetic materials with geotechnical properties similar to those of soils can be used to study 3-D deformation and flow problems in natural soils. Transparent soils are made of either silica gel or silica powder and a pore fluid with a matching refractive index. Two families of transparent soils were developed. The first family, made from silica gel, was used to model sands. The second family was made from silica powder to model clays.
520 $a An optical system consisting of a laser light, a CCD camera, a frame grabber, and a PC was developed to measure deformations in transparent soil non-intrusively. The model was sliced optically using a laser light sheet. A distinctive speckle pattern was generated by the interaction of the laser light and transparent soil. A 2-D deformation field was obtained from two speckle images by using an image processing technique named adaptive cross-correlation (ACC). ACC is an advanced digital image cross-correlation (DIC) algorithm. ACC utilizes both window sizing and window shifting methods to give a better performance than conventional DIC in the analysis of soil images.
520 $a Transparent synthetic soils were found to exhibit geotechnical properties similar to those of natural soils. Comparison of 2-D deformation fields between transparent soil and natural soil showed that the results were comparable in almost every aspect. The advection-dispersion processes were visible in 2-D flow test in transparent soil. All the tests proved that transparent soils can be used for strength, deformation, and pollutant transport in natural soils.
520 $a The 3-D deformation fields under a model footing were obtained by combining 2-D deformation fields of multiple cross-sections. The results verified that the developed system and transparent soil are suitable for the study of 3-D deformation problems in natural soils.
520 $a The main advantages of the developed methodology are as follows. First, a continuous deformation field was obtained non-intrusively. Second, the developed method can be readily adjusted based on the modeling requirements. Third, the low cost permits its routine application in geotechnical and geo-environmental researches. Finally, transparent synthetic soil is the only material capable in representing a wide range of natural soils, which can be used in simulating complicated geological features.
590 $a School code: 0179.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Geotechnology. $3 1018558
690 $a 0428
690 $a 0543
710 2 0 $a Polytechnic University. $3 1249856
773 0 $t Dissertation Abstracts International $g 63-12B.
790 $a 0179
790 1 0 $a Iskander, Magued G., $e advisor
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3073677