國立虎尾科技大學 |

Manufacturing optimal nanocrystalline microtruss materials.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Manufacturing optimal nanocrystalline microtruss materials./
作者:	Lausic, Ante Tony.
面頁冊數:	1 online resource (254 pages)
附註:	Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.
Contained By:	Dissertation Abstracts International78-01B(E).
標題:	Aerospace engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9781339947013

Manufacturing optimal nanocrystalline microtruss materials.
Lausic, Ante Tony.

Manufacturing optimal nanocrystalline microtruss materials. - 1 online resource (254 pages)

Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

Fabrication of optimal ultra-lightweight hybrid cellular materials via a two-step synthesis method of rapid prototyping followed by electrodeposition was accomplished in three distinct stages: modelling, fabrication, and validation. For the first stage, a baseline microtruss architecture with multiple geometric and material degrees of freedom was optimized with relation to the expected failure mechanisms. An intrinsic link between material selection and architectural variables was discovered and quantified. For a given electrodeposited polycrystalline Ni/polymer microtruss that has already been optimized for maximum load carrying capacity with minimal mass, substituting a nanocrystalline coating shifts the location of optimal design. It is possible through the redistribution of metal and polymer in this nanocrystalline microtruss to further decrease the total beam mass by a factor of three, showcasing this material-geometry dependency. The second stage hinged on developing a novel processing technique to deposit metal coatings on the as-printed polymer parts. The critical step of adhesion was solved using an 18~M sulphuric acid wash to preferentially smoothen the inherent 0.6~mm roughness on the samples. Finally, the models were validated through the testing of as-printed and coated rods and microtrusses. Nanocrystalline microtrusses showed a 60x increase in peak flexural strength with only a 6x increase in density. Further optimization can more than halve the final density while maintaining the same load carrying capacity by removing the sacrificial polymer core using the same sulphuric acid wash. The experimental values fit very well to those predicted in stage one for varying slenderness ratios, scales, and material systems.

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

Mode of access: World Wide Web

ISBN: 9781339947013Subjects--Topical Terms:

686400
Aerospace engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Manufacturing optimal nanocrystalline microtruss materials.
LDR:03053ntm a2200349Ki 4500 001 909420
005 20180426100010.5
006 m o u
007 cr mn||||a|a||
008 190606s2016 xx obm 000 0 eng d
020 $a 9781339947013
035 $a (MiAaPQ)AAI10139204
035 $a (MiAaPQ)toronto:13753
035 $a AAI10139204
040 $a MiAaPQ $b eng $c MiAaPQ
099 $a TUL $f hyy $c available through World Wide Web
100 1 $a Lausic, Ante Tony. $3 1180204
245 1 0 $a Manufacturing optimal nanocrystalline microtruss materials.
264 0 $c 2016
300 $a 1 online resource (254 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: 78-01(E), Section: B.
500 $a Advisers: Glenn D. Hibbard; Craig A. Steeves.
502 $a Thesis (Ph.D.) $c University of Toronto (Canada) $d 2016.
504 $a Includes bibliographical references
520 $a Fabrication of optimal ultra-lightweight hybrid cellular materials via a two-step synthesis method of rapid prototyping followed by electrodeposition was accomplished in three distinct stages: modelling, fabrication, and validation. For the first stage, a baseline microtruss architecture with multiple geometric and material degrees of freedom was optimized with relation to the expected failure mechanisms. An intrinsic link between material selection and architectural variables was discovered and quantified. For a given electrodeposited polycrystalline Ni/polymer microtruss that has already been optimized for maximum load carrying capacity with minimal mass, substituting a nanocrystalline coating shifts the location of optimal design. It is possible through the redistribution of metal and polymer in this nanocrystalline microtruss to further decrease the total beam mass by a factor of three, showcasing this material-geometry dependency. The second stage hinged on developing a novel processing technique to deposit metal coatings on the as-printed polymer parts. The critical step of adhesion was solved using an 18~M sulphuric acid wash to preferentially smoothen the inherent 0.6~mm roughness on the samples. Finally, the models were validated through the testing of as-printed and coated rods and microtrusses. Nanocrystalline microtrusses showed a 60x increase in peak flexural strength with only a 6x increase in density. Further optimization can more than halve the final density while maintaining the same load carrying capacity by removing the sacrificial polymer core using the same sulphuric acid wash. The experimental values fit very well to those predicted in stage one for varying slenderness ratios, scales, and material systems.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Aerospace engineering. $3 686400
650 4 $a Materials science. $3 557839
655 7 $a Electronic books. $2 local $3 554714
690 $a 0538
690 $a 0794
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Toronto (Canada). $b Materials Science and Engineering. $3 1180205
773 0 $t Dissertation Abstracts International $g 78-01B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10139204 $z click for full text (PQDT)