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

Modeling spanwise nonuniformity in t...

Georgia Institute of Technology.

FindBook

Google Book

Amazon

博客來

Modeling spanwise nonuniformity in the cross-sectional analysis of composite beams.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Modeling spanwise nonuniformity in the cross-sectional analysis of composite beams./
作者:	Ho, Jimmy Cheng-Chung.
面頁冊數:	167 p.
附註:	Adviser: Dewey H. Hodges.
Contained By:	Dissertation Abstracts International70-09B.
標題:	Applied Mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3376292
ISBN:	9781109372281

Modeling spanwise nonuniformity in the cross-sectional analysis of composite beams.
Ho, Jimmy Cheng-Chung.

Modeling spanwise nonuniformity in the cross-sectional analysis of composite beams. - 167 p.

Adviser: Dewey H. Hodges.

Thesis (Ph.D.)--Georgia Institute of Technology, 2009.

Spanwise nonuniformity effects are modeled in the cross-sectional analysis of beam theory. This modeling adheres to an established numerical framework on cross-sectional analysis of uniform beams with arbitrary cross-sections. This framework is based on two concepts: decomposition of the rotation tensor and the variational-asymptotic method. Allowance of arbitrary materials and geometries in the cross-section is from discretization of the warping field by finite elements. By this approach, dimensional reduction from three-dimensional elasticity is performed rigorously and the sectional strain energy is derived to be asymptotically-correct. Elastic stiffness matrices are derived for inputs into the global beam analysis. Recovery relations for the displacement, stress, and strain fields are also derived with care to be consistent with the energy. Spanwise nonuniformity effects appear in the form of pointwise and sectionwise derivatives, which are approximated by finite differences. The formulation also accounts for the effects of spanwise variations in initial twist and/or curvature.

ISBN: 9781109372281Subjects--Topical Terms:

1018410
Applied Mechanics.

Modeling spanwise nonuniformity in the cross-sectional analysis of composite beams.
LDR:03407nmm 2200313 a 45 001 874425
005 20100824
008 100824s2009 ||||||||||||||||| ||eng d
020 $a 9781109372281
035 $a (UMI)AAI3376292
035 $a AAI3376292
040 $a UMI $c UMI
100 1 $a Ho, Jimmy Cheng-Chung. $3 1043700
245 1 0 $a Modeling spanwise nonuniformity in the cross-sectional analysis of composite beams.
300 $a 167 p.
500 $a Adviser: Dewey H. Hodges.
500 $a Source: Dissertation Abstracts International, Volume: 70-09, Section: B, page: .
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2009.
520 $a Spanwise nonuniformity effects are modeled in the cross-sectional analysis of beam theory. This modeling adheres to an established numerical framework on cross-sectional analysis of uniform beams with arbitrary cross-sections. This framework is based on two concepts: decomposition of the rotation tensor and the variational-asymptotic method. Allowance of arbitrary materials and geometries in the cross-section is from discretization of the warping field by finite elements. By this approach, dimensional reduction from three-dimensional elasticity is performed rigorously and the sectional strain energy is derived to be asymptotically-correct. Elastic stiffness matrices are derived for inputs into the global beam analysis. Recovery relations for the displacement, stress, and strain fields are also derived with care to be consistent with the energy. Spanwise nonuniformity effects appear in the form of pointwise and sectionwise derivatives, which are approximated by finite differences. The formulation also accounts for the effects of spanwise variations in initial twist and/or curvature.
520 $a A linearly tapered isotropic strip is analyzed to demonstrate spanwise nonuniformity effects on the cross-sectional analysis. The analysis is performed analytically by the variational-asymptotic method. Results from beam theory are validated against solutions from plane stress elasticity. These results demonstrate that spanwise nonuniformity effects become significant as the rate at which the cross-sections vary increases.
520 $a The modeling of transverse shear modes of deformation is accomplished by transforming the strain energy into generalized Timoshenko form. Approximations in this transformation procedure from previous works, when applied to uniform beams, are identified. The approximations are not used in the present work so as to retain more accuracy. Comparison of present results with those previously published shows that these approximations sometimes change the results measurably and thus are inappropriate. Static and dynamic results, from the global beam analysis, are calculated to show the differences between using stiffness constants from previous works and the present work. As a form of validation of the transformation procedure, calculations from the global beam analysis of initially twisted isotropic beams from using curvilinear coordinate axes featuring twist are shown to be equivalent to calculations using Cartesian coordinates.
590 $a School code: 0078.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Aerospace. $3 1018395
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0346
690 $a 0538
690 $a 0548
710 2 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 70-09B.
790 $a 0078
790 1 0 $a Hodges, Dewey H., $e advisor
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3376292