Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures
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University of Akron / OhioLINK
2011
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ndltd-OhioLink-oai-etd.ohiolink.edu-akron13226839242021-08-03T05:26:49Z Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures Fang, Jia Chemical Engineering Periodic nano- or microstructures play an essential role in many fundamental researches and technological applications. This study reports the experimental details in creating periodic parallel silicone strips by simply peel an oxidized silicone sheet from its bonded substrate. This spontaneous formation of strips is initiated by a mixed-mode of separation along the peeling direction and subsequent channeling of initiated cracks. This study also provides experimental evidence on the fracture formation of ordered strips using glassy polymer thin films.For fracture induced strips formation over a large area following the method developed by Yangjun Cai, both the oxidization extent of the Poly(dimethylsiloxane) (PDMS) sheet using UV/Ozone and the effect of oxidization extent on the strip spacing were examined. The effects of various experimental parameters, including elastic modulus of silica-like layer, pre-crack, and pre-wrinkling of the silicone surface bonded to the substrate, and glassy silica-like layer on the edge were examined. The results showed that these parameters were possible to change the initiation of the cracks during fracture or the spacing between cracks. The effect of other factors including the peeling angle, peeling force, elastic modulus and the thickness of the PDMS sheet were also explored. Those conditions proved to have little to no effect on the spacing or initiation of the cracks. Fracture-induced structuring (FIS) of glassy polymer thin films developed by Chai et al, was also followed. Similar results on the dependency of strip spacing on film thickness were observed. 2011-12-20 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1322683924 http://rave.ohiolink.edu/etdc/view?acc_num=akron1322683924 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Chemical Engineering |
| spellingShingle |
Chemical Engineering Fang, Jia Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures |
| author |
Fang, Jia |
| author_facet |
Fang, Jia |
| author_sort |
Fang, Jia |
| title |
Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures |
| title_short |
Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures |
| title_full |
Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures |
| title_fullStr |
Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures |
| title_full_unstemmed |
Experimental Evidence of Fracture-Induced Formation of Ordered Strip Structures |
| title_sort |
experimental evidence of fracture-induced formation of ordered strip structures |
| publisher |
University of Akron / OhioLINK |
| publishDate |
2011 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=akron1322683924 |
| work_keys_str_mv |
AT fangjia experimentalevidenceoffractureinducedformationoforderedstripstructures |
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1719420202475585536 |