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Local Mechanical Fields in Interface...

Burrows, Brian James.

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Local Mechanical Fields in Interface Percolated Nanocomposites.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Local Mechanical Fields in Interface Percolated Nanocomposites./
Author:	Burrows, Brian James.
Description:	57 p.
Notes:	Source: Masters Abstracts International, Volume: 53-05.
Contained By:	Masters Abstracts International53-05(E).
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1564183
ISBN:	9781321154924

Local Mechanical Fields in Interface Percolated Nanocomposites.
Burrows, Brian James.

Local Mechanical Fields in Interface Percolated Nanocomposites. - 57 p.

Source: Masters Abstracts International, Volume: 53-05.

Thesis (M.S.)--University of South Carolina, 2014.

Polymer nanocomposites can enable the innovative design of multi-functional materials. Metallic fillers in polymer matrices can exhibit improved electronic properties at low volume fractions while maintaining the low density, transparency, and easy processing of polymers. Surprisingly, mechanical properties also show enhancement at these uncharacteristically low volume fractions. Two mechanisms have been suggested as contributing to this enhancement. The first is the formation of a percolated microstructure; the second is the significant influence of the interface region between the matrix and filler. The majority of mathematical models describing this novel mechanical behavior are based on percolation models, which only consider microstructural connectivity. Changes in mechanical properties are likely to be affected by complex microstructures, beyond the simply connected, as well as by micromechanical mechanisms associated with these microstructures. These more complex microstructures and mechanisms may be challenging to identify and describe. In this work the underlying mechanical mechanisms are investigated using a probabilistic and statistical characterization of local strain fields. These continuous fields are more amenable to statistical characterization than the spatial ternary (matrix, particle and interface) fields that describe the microstructure. An apparent percolation threshold is identified based on statistical characterization of the elastic moduli, distributions of local strains and spatial autocorrelation of local strain fields. The statistics of strain fields associated with microstructures producing minimum and maximum moduli are also compared.

ISBN: 9781321154924Subjects--Topical Terms:

783786
Engineering, Mechanical.

Local Mechanical Fields in Interface Percolated Nanocomposites.
LDR:02572nam a2200289 4500 001 1967049
005 20141112075753.5
008 150210s2014 ||||||||||||||||| ||eng d
020 $a 9781321154924
035 $a (MiAaPQ)AAI1564183
035 $a AAI1564183
040 $a MiAaPQ $c MiAaPQ
100 1 $a Burrows, Brian James. $3 2103967
245 1 0 $a Local Mechanical Fields in Interface Percolated Nanocomposites.
300 $a 57 p.
500 $a Source: Masters Abstracts International, Volume: 53-05.
500 $a Advisers: Sarah Baxter; Edward Gatzke.
502 $a Thesis (M.S.)--University of South Carolina, 2014.
520 $a Polymer nanocomposites can enable the innovative design of multi-functional materials. Metallic fillers in polymer matrices can exhibit improved electronic properties at low volume fractions while maintaining the low density, transparency, and easy processing of polymers. Surprisingly, mechanical properties also show enhancement at these uncharacteristically low volume fractions. Two mechanisms have been suggested as contributing to this enhancement. The first is the formation of a percolated microstructure; the second is the significant influence of the interface region between the matrix and filler. The majority of mathematical models describing this novel mechanical behavior are based on percolation models, which only consider microstructural connectivity. Changes in mechanical properties are likely to be affected by complex microstructures, beyond the simply connected, as well as by micromechanical mechanisms associated with these microstructures. These more complex microstructures and mechanisms may be challenging to identify and describe. In this work the underlying mechanical mechanisms are investigated using a probabilistic and statistical characterization of local strain fields. These continuous fields are more amenable to statistical characterization than the spatial ternary (matrix, particle and interface) fields that describe the microstructure. An apparent percolation threshold is identified based on statistical characterization of the elastic moduli, distributions of local strains and spatial autocorrelation of local strain fields. The statistics of strain fields associated with microstructures producing minimum and maximum moduli are also compared.
590 $a School code: 0202.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Nanoscience. $3 587832
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0548
690 $a 0565
690 $a 0794
710 2 $a University of South Carolina. $b Mechanical Engineering. $3 1030795
773 0 $t Masters Abstracts International $g 53-05(E).
790 $a 0202
791 $a M.S.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1564183