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Design, Mechanical Modeling and 3D Printing of Koch Fractal Contact and Interlocking.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Design, Mechanical Modeling and 3D Printing of Koch Fractal Contact and Interlocking./
Author:	Khoshhesab, Mona Monsef.
Description:	1 online resource (116 pages)
Notes:	Source: Masters Abstracts International, Volume: 57-01.
Contained By:	Masters Abstracts International57-01(E).
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355306613

Design, Mechanical Modeling and 3D Printing of Koch Fractal Contact and Interlocking.
Khoshhesab, Mona Monsef.

Design, Mechanical Modeling and 3D Printing of Koch Fractal Contact and Interlocking. - 1 online resource (116 pages)

Source: Masters Abstracts International, Volume: 57-01.

Thesis (M.S.)--University of New Hampshire, 2017.

Includes bibliographical references

Topological interlocking is an effective joining approach in both natural and engineering systems. Especially, hierarchical/fractal interlocking were found in many biological systems and can significantly enhance the system mechanical properties. Inspired by the hierarchical/fractal topology in nature, mechanical models for Koch fractal interlocking were developed as an example system to better understand the mechanics of fractal interlocking. In this investigation, Koch fractal interlocking with and without adhesive layers were designed for different number of iterations N. Theoretical contact mechanics model was used to capture the deformation mechanisms of the fractal interlocking with no adhesive layers under relatively small deformation. Then finite element (FE) simulations were performed to study the mechanical behavior of fractal interlocking under finite deformation. The designs were also fabricated via a multi-material 3D printer (Objet Connex 260) and mechanical experiments were performed to further explore the mechanical performance of the new designs. It was found that the load-bearing capacity of Kotch fractal interlocking can be effectively increased via fractal design.

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

Mode of access: World Wide Web

ISBN: 9780355306613Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Design, Mechanical Modeling and 3D Printing of Koch Fractal Contact and Interlocking.
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100 1 $a Khoshhesab, Mona Monsef. $3 1193602
245 1 0 $a Design, Mechanical Modeling and 3D Printing of Koch Fractal Contact and Interlocking.
264 0 $c 2017
300 $a 1 online resource (116 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: Masters Abstracts International, Volume: 57-01.
500 $a Adviser: Yaning Li.
502 $a Thesis (M.S.)--University of New Hampshire, 2017.
504 $a Includes bibliographical references
520 $a Topological interlocking is an effective joining approach in both natural and engineering systems. Especially, hierarchical/fractal interlocking were found in many biological systems and can significantly enhance the system mechanical properties. Inspired by the hierarchical/fractal topology in nature, mechanical models for Koch fractal interlocking were developed as an example system to better understand the mechanics of fractal interlocking. In this investigation, Koch fractal interlocking with and without adhesive layers were designed for different number of iterations N. Theoretical contact mechanics model was used to capture the deformation mechanisms of the fractal interlocking with no adhesive layers under relatively small deformation. Then finite element (FE) simulations were performed to study the mechanical behavior of fractal interlocking under finite deformation. The designs were also fabricated via a multi-material 3D printer (Objet Connex 260) and mechanical experiments were performed to further explore the mechanical performance of the new designs. It was found that the load-bearing capacity of Kotch fractal interlocking can be effectively increased via fractal design.
520 $a In general, when the fractal complexity (it is specifically represented as number of hierarchy N in the present Koch fractal design) increases, the stiffness of the fractal interlocking will increase significantly. Also, when N increases, the stress are more uniformly distributed along the fractal boundary of the top and bottom pieces of the fractal interlocking, which efficiently reduce local stress concentration, and therefore the overall strength of the interlocking also increases.
520 $a However, the mechanical responses of fractal interlocks are also sensitive to imperfections, such as the gap between the interlocked pieces and the rounded tips. When fractal complexity increases, the mechanical properties will become more and more sensitive to the imperfection and eventually, the negative influences from imperfection can even become dominant. Therefore, considering the imperfection, there is an optimal level of fractal complexity to reach the maximum mechanical performance. This result is in consistent with fractal interlocks in different biological systems.
520 $a Except topology, the influences of friction, material properties and damage evolution, and the adhesive layer on the mechanical performance of Koch fractal interlocking were also evaluated via non-linear FE simulations and mechanical experiments on 3D printed Koch interlocking specimens. It was found that the adhesive layer can significantly improve the load transmission of the fractal interlocking and therefore can effectively amplify the interlocking efficiency.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Mechanical engineering. $3 557493
650 4 $a Design. $3 595500
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
690 $a 0389
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of New Hampshire. $b Mechanical Engineering. $3 1193603
773 0 $t Masters Abstracts International $g 57-01(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10621306 $z click for full text (PQDT)