東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Guided waves technique for measureme...

Damljanovic, Vesna.

FindBook

Google Book

Amazon

博客來

Guided waves technique for measurement of contained stress in uniform slender elastic bodies.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Guided waves technique for measurement of contained stress in uniform slender elastic bodies./
作者:	Damljanovic, Vesna.
面頁冊數:	104 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3893.
Contained By:	Dissertation Abstracts International64-08B.
標題:	Applied Mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3101825
ISBN:	0496494112

Guided waves technique for measurement of contained stress in uniform slender elastic bodies.
Damljanovic, Vesna.

Guided waves technique for measurement of contained stress in uniform slender elastic bodies. - 104 p.

Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3893.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.

Beam-like structural elements with length much greater than the characteristic length of the cross-section are vulnerable to large forces induced either by constrained thermal expansions and contractions, or by the weights and constraints from neighboring elements in the structure. The often violent consequences of the resulting buckling and breakage continue to emphasize the need for cost-effective and accurate methods for in situ measurement of axial stress in slender elements, especially in the circumstances where only a small span of the total length is free from the loads and supports. A new method for in situ contained stress measurements, based on the change of dynamic flexural rigidity under the influence of compressive load, is proposed in this thesis. Scanned laser vibrometry measurements of vibration fields at a prescribed frequency, followed by a comparison with guided wave theory, allow extraction of the wavenumbers associated with all the propagating and evanescent modes in the body. The wavenumber associated with the bending mode is in turn related to contained stress and to the intrinsic rigidity of the beam. For the particular and technologically pressing case of railroad rail, a priori estimates for the needed precisions, followed by the numerical simulations and laboratory measurements, have established that the technique is viable. It is sensitive to contained load and, most importantly, it does not require modeling of supports, it is insensitive to residual stress and microstructure and it does not require zero-state referencing. The measurement precisions sufficient to make it practical have been achieved successfully in the lab.

ISBN: 0496494112Subjects--Topical Terms:

1018410
Applied Mechanics.

Guided waves technique for measurement of contained stress in uniform slender elastic bodies.
LDR:02627nmm 2200289 4500 001 1846147
005 20051117110055.5
008 130614s2003 eng d
020 $a 0496494112
035 $a (UnM)AAI3101825
035 $a AAI3101825
040 $a UnM $c UnM
100 1 $a Damljanovic, Vesna. $3 1934278
245 1 0 $a Guided waves technique for measurement of contained stress in uniform slender elastic bodies.
300 $a 104 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3893.
500 $a Adviser: Richard L. Weaver.
502 $a Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.
520 $a Beam-like structural elements with length much greater than the characteristic length of the cross-section are vulnerable to large forces induced either by constrained thermal expansions and contractions, or by the weights and constraints from neighboring elements in the structure. The often violent consequences of the resulting buckling and breakage continue to emphasize the need for cost-effective and accurate methods for in situ measurement of axial stress in slender elements, especially in the circumstances where only a small span of the total length is free from the loads and supports. A new method for in situ contained stress measurements, based on the change of dynamic flexural rigidity under the influence of compressive load, is proposed in this thesis. Scanned laser vibrometry measurements of vibration fields at a prescribed frequency, followed by a comparison with guided wave theory, allow extraction of the wavenumbers associated with all the propagating and evanescent modes in the body. The wavenumber associated with the bending mode is in turn related to contained stress and to the intrinsic rigidity of the beam. For the particular and technologically pressing case of railroad rail, a priori estimates for the needed precisions, followed by the numerical simulations and laboratory measurements, have established that the technique is viable. It is sensitive to contained load and, most importantly, it does not require modeling of supports, it is insensitive to residual stress and microstructure and it does not require zero-state referencing. The measurement precisions sufficient to make it practical have been achieved successfully in the lab.
590 $a School code: 0090.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Physics, Acoustics. $3 1019086
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0346
690 $a 0986
690 $a 0548
710 2 0 $a University of Illinois at Urbana-Champaign. $3 626646
773 0 $t Dissertation Abstracts International $g 64-08B.
790 1 0 $a Weaver, Richard L., $e advisor
790 $a 0090
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3101825