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Elastic wave scattering by partially...

Kim, Yong Woo.

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Elastic wave scattering by partially debonded or partially coated fibers.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Elastic wave scattering by partially debonded or partially coated fibers./
Author:	Kim, Yong Woo.
Description:	229 p.
Notes:	Source: Dissertation Abstracts International, Volume: 53-05, Section: B, page: 2393.
Contained By:	Dissertation Abstracts International53-05B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9226720

Elastic wave scattering by partially debonded or partially coated fibers.
Kim, Yong Woo.

Elastic wave scattering by partially debonded or partially coated fibers. - 229 p.

Source: Dissertation Abstracts International, Volume: 53-05, Section: B, page: 2393.

Thesis (Ph.D.)--The Pennsylvania State University, 1992.

The prediction and quantitative assessment of composite material behavior remains difficult since the macromechanical behavior of composite materials depends not only on the microstructure but also on the way in which damage occurs. The damage may be accumulated from delamination, debonding, initiation and growth of cracks in the fiber and matrix and at the interface. This accumulation can affect the structural or mechanical performance of the advanced composite material.Subjects--Topical Terms:

1018410
Applied Mechanics.

Elastic wave scattering by partially debonded or partially coated fibers.
LDR:02978nmm 2200289 4500 001 1825677
005 20061211115735.5
008 130610s1992 eng d
035 $a (UnM)AAI9226720
035 $a AAI9226720
040 $a UnM $c UnM
100 1 $a Kim, Yong Woo. $3 1914675
245 1 0 $a Elastic wave scattering by partially debonded or partially coated fibers.
300 $a 229 p.
500 $a Source: Dissertation Abstracts International, Volume: 53-05, Section: B, page: 2393.
500 $a Adviser: V. V. Varadan.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 1992.
520 $a The prediction and quantitative assessment of composite material behavior remains difficult since the macromechanical behavior of composite materials depends not only on the microstructure but also on the way in which damage occurs. The damage may be accumulated from delamination, debonding, initiation and growth of cracks in the fiber and matrix and at the interface. This accumulation can affect the structural or mechanical performance of the advanced composite material.
520 $a Thus, the prevention of structural or mechanical failure is an important requirement in designing the advanced composite material, which is very difficult to achieve employing the classical theories of mechanics that are not useful for analyzing the inhomogeneity arising from the material microstructure and nonuniform damage. To examine such problems, we have developed a modification of the null field method to study the effects of debonding at the interface between the reinforcing fiber and matrix medium on the dynamic response of a composite material. The modification of null field approach is achieved by the introduction of a mathematical surface as well as by field expansions inside the cylinder in terms of regular waves and the field outside the cylinder as a sum of the incident field and the scattered field. The scattering cross section and the farfield amplitude are calculated as a function of frequency, fiber properties and debonding area. Another practical application of such a study is nondestructive evaluation and fracture characterization of composite materials. By ultrasonic testing and inverse analysis, one can represent the geometrical and relevant fracture parameters of the material.
520 $a Also, an alternative null field approach has been developed to study elastic wave scattering from a partially coated fiber corresponding to a thin coating on a curved surface which is typically referred to as concavo-convex. The validity of the numerical results is ensured by checking the symmetry and unitarity condition on the T-matrix as well as making comparisons with known results.
590 $a School code: 0176.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0346
690 $a 0794
710 2 0 $a The Pennsylvania State University. $3 699896
773 0 $t Dissertation Abstracts International $g 53-05B.
790 1 0 $a Varadan, V. V., $e advisor
790 $a 0176
791 $a Ph.D.
792 $a 1992
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9226720