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A multiscale approach to link microstructure variability to macroscopic composite properties.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	A multiscale approach to link microstructure variability to macroscopic composite properties./
Author:	Sanei, Seyed Hamid Reza.
Description:	1 online resource (241 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-03(E), Section: B.
Contained By:	Dissertation Abstracts International78-03B(E).
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369094190

A multiscale approach to link microstructure variability to macroscopic composite properties.
Sanei, Seyed Hamid Reza.

A multiscale approach to link microstructure variability to macroscopic composite properties. - 1 online resource (241 pages)

Source: Dissertation Abstracts International, Volume: 78-03(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

High specific stiffness and strength of composite materials have been the impetus for their widespread use. Despite the advantages associated with the use of composite materials in different industrial sectors, variability in their properties has made predicting their reliability a challenge and led to the use of high safety factors in real applications. While such variability has been studied experimentally, the link between the observed variability and the physics of the underlying microstructure has not been rigorously established. Such variabilities are present in microstructures in the form of both morphological and constituent properties variability. The variability in constituent properties can be determined by nanoindentation technique and morphological variabilities are determined by image analysis of actual microstructures. To reproduce such variability, a methodology was developed in which random microstructures were generated and subsequently adjusted to simultaneously match both short-range and long-range statistics of actual microstructures. For a multiscale purposes, synthetic microstructures were generated at an intermediate length scale of 70 micron, corresponding to the length scale at which the local fiber volume fraction of adjacent microstructures become uncorrelated. Each realization of microstructure was then converted to finite element model for mechanical properties analysis. Extended finite element method and cohesive surfaces were implemented to predict matrix cracking and fiber-matrix debonding. The results revealed that there is a large variability in transverse strength from one realization to another. This finding indicates that microstructure morphology is a major contributor to the variability in transverse strength.

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

Mode of access: World Wide Web

ISBN: 9781369094190Subjects--Topical Terms:

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

554714
Electronic books.

A multiscale approach to link microstructure variability to macroscopic composite properties.
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245 1 2 $a A multiscale approach to link microstructure variability to macroscopic composite properties.
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300 $a 1 online resource (241 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 78-03(E), Section: B.
500 $a Adviser: Ray S. Fertig III.
502 $a Thesis (Ph.D.) $c University of Wyoming $d 2016.
504 $a Includes bibliographical references
520 $a High specific stiffness and strength of composite materials have been the impetus for their widespread use. Despite the advantages associated with the use of composite materials in different industrial sectors, variability in their properties has made predicting their reliability a challenge and led to the use of high safety factors in real applications. While such variability has been studied experimentally, the link between the observed variability and the physics of the underlying microstructure has not been rigorously established. Such variabilities are present in microstructures in the form of both morphological and constituent properties variability. The variability in constituent properties can be determined by nanoindentation technique and morphological variabilities are determined by image analysis of actual microstructures. To reproduce such variability, a methodology was developed in which random microstructures were generated and subsequently adjusted to simultaneously match both short-range and long-range statistics of actual microstructures. For a multiscale purposes, synthetic microstructures were generated at an intermediate length scale of 70 micron, corresponding to the length scale at which the local fiber volume fraction of adjacent microstructures become uncorrelated. Each realization of microstructure was then converted to finite element model for mechanical properties analysis. Extended finite element method and cohesive surfaces were implemented to predict matrix cracking and fiber-matrix debonding. The results revealed that there is a large variability in transverse strength from one realization to another. This finding indicates that microstructure morphology is a major contributor to the variability in transverse strength.
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 Materials science. $3 557839
650 4 $a Civil engineering. $3 561339
655 7 $a Electronic books. $2 local $3 554714
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710 2 $a University of Wyoming. $b Mechanical Engineering. $3 1180254
773 0 $t Dissertation Abstracts International $g 78-03B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10154311 $z click for full text (PQDT)