國立虎尾科技大學 |

Topology Optimization of Emerging Complex Structures.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Topology Optimization of Emerging Complex Structures./
Author:	Deng, Jiadong.
Description:	1 online resource (228 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-02(E), Section: B.
Contained By:	Dissertation Abstracts International78-02B(E).
Subject:	Engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369155907

Topology Optimization of Emerging Complex Structures.
Deng, Jiadong.

Topology Optimization of Emerging Complex Structures. - 1 online resource (228 pages)

Source: Dissertation Abstracts International, Volume: 78-02(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

This item is not available from ProQuest Dissertations & Theses.

Topology optimization (TO) has played a critical role in engineering design due to its capability of creating innovative design concepts by formulating a design problem as an optimal material distribution problem. As a powerful conceptual design tool, TO has been leveraged to obtain innovative structures, metamaterials (material microstructures), and multiscale structures with porous materials, in increasingly complex engineering applications. Challenging problems associated with TO of complex structures include multifunctional structure design, multidisciplinary structure design, nonlinear problems, and robust structure design considering various forms of uncertainties.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369155907Subjects--Topical Terms:

561152
Engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Topology Optimization of Emerging Complex Structures.
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100 1 $a Deng, Jiadong. $3 1180288
245 1 0 $a Topology Optimization of Emerging Complex Structures.
264 0 $c 2016
300 $a 1 online resource (228 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 78-02(E), Section: B.
500 $a Adviser: Wei Chen.
502 $a Thesis (Ph.D.) $c Northwestern University $d 2016.
504 $a Includes bibliographical references
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a Topology optimization (TO) has played a critical role in engineering design due to its capability of creating innovative design concepts by formulating a design problem as an optimal material distribution problem. As a powerful conceptual design tool, TO has been leveraged to obtain innovative structures, metamaterials (material microstructures), and multiscale structures with porous materials, in increasingly complex engineering applications. Challenging problems associated with TO of complex structures include multifunctional structure design, multidisciplinary structure design, nonlinear problems, and robust structure design considering various forms of uncertainties.
520 $a This dissertation will be mainly focused on developing TO methods to successfully address the design challenges for two kinds of innovative and complex structures: flexible structures and multiscale structures. The common challenge in designing these two kinds of structures using state-of-the-art TO methods is the issue of disconnected structures or material microstructures.
520 $a For flexible structure TO, to get rid of structure degeneration issue (hinges/ gray areas/ disconnected structures), an innovative connected morphable components based TO methodology is proposed. Its effectiveness in preventing flexible structures from degenerating is validated using challenging design problems, such as compliance maximization, compliant mechanism design, and low-frequency resonating energy harvesting microdevices design. The proposed methodology will be viable for more challenging structure design problems, such as flexible nonlinear structure design, and multifunctional or multidisciplinary flexible structure design.
520 $a For multiscale structure TO design, to obtain well-connected microstructures and thus bridge the gap between multiscale structure TO and additive manufacturing, an effective multiscale structure TO design framework based on the approach of connected morphable components is developed. By fully exploiting the benefits of the connected morphable components approach, effective linkage schemes to guarantee smooth transitions/connectivity between neighboring material microstructures (unit cells) are devised. Multiscale structures with well-connected material microstructures or graded material microstructures with a similar topology are achieved with improved performance. The advantages of the proposed methodology will benefit a wide range of manufacturable multiscale structures to achieve superior functionalities such as desired permeability for biomedical applications, enhanced structural thermal insulation, and improved structural stability or energy absorption performances.
520 $a Finally, the state-of-the-art multiscale structure TO methodologies --- the concurrent TO framework and the hierarchical TO frameworks, are extended to design robust high performance multiscale structures considering random field loading uncertainties. Specifically, a robust concurrent TO formulation with multiple porous materials considering random field loading uncertainty is first presented. The scientific contributions of this part of the work also include clarifying the physical meaning of the interpolation schemes in concurrent TO model, improving the sensitivity analysis in efficient TO under loading uncertainty method, and deriving improved sensitivities for TO using volume preserving filtering technique. At the end, an optimization formulation for robust hierarchical TO of multiscale structures is proposed. The hierarchical TO is compared with the homogenization based TO method and the single scale TO method to demonstrate its effectiveness in achieving robust multiscale structures.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Engineering. $3 561152
650 4 $a Mechanical engineering. $3 557493
655 7 $a Electronic books. $2 local $3 554714
690 $a 0537
690 $a 0548
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Northwestern University. $b Mechanical Engineering. $3 1180174
773 0 $t Dissertation Abstracts International $g 78-02B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10160683 $z click for full text (PQDT)