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Load Transfer in an Isolated Particle Embedded within an Epoxy Matrix

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Date Issued:
2014
Abstract/Description:
Particulate composites are widely used in many aerospace applications such as protective coatings, adhesives, or structural members of a body and their mechanical properties and behavior have gained increasing significance. The addition of modifiers such as alumina generally leads to improved mechanical properties. This addition also enables the non-invasive study of the load transfer between the particle and the matrix. Understanding the load transfer between the particulate and the matrix material is the first step to understanding the behavior and mechanical properties of the composite as a whole. In this work, samples with an isolated alumina particle embedded in an epoxy matrix were created to replicate the ideal assumptions for many particulate mechanics models. In separate experiments, both photo stimulated luminescent spectroscopy (PSLS) and synchrotron radiation were used to collect the spectral emission and diffraction rings, respectively, from the mechanically loaded samples. The PSLS data and XRD data are shown to be in qualitative agreement that as particle size is increased, the load transferred to the particle also increased for the range of particle sizes tested. This trend of increasing load transfer with increasing particle size is compared with the classical Eshelby model. Results from this work provide experimental insight into the load transfer properties of particulate composites and can serve to experimentally validate the theoretical load transfer models that currently exist.
Title: Load Transfer in an Isolated Particle Embedded within an Epoxy Matrix.
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Name(s): Durnberg, Erik, Author
Raghavan, Seetha, Committee Chair
Gou, Jihua, Committee Member
Bai, Yuanli, Committee Member
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2014
Publisher: University of Central Florida
Language(s): English
Abstract/Description: Particulate composites are widely used in many aerospace applications such as protective coatings, adhesives, or structural members of a body and their mechanical properties and behavior have gained increasing significance. The addition of modifiers such as alumina generally leads to improved mechanical properties. This addition also enables the non-invasive study of the load transfer between the particle and the matrix. Understanding the load transfer between the particulate and the matrix material is the first step to understanding the behavior and mechanical properties of the composite as a whole. In this work, samples with an isolated alumina particle embedded in an epoxy matrix were created to replicate the ideal assumptions for many particulate mechanics models. In separate experiments, both photo stimulated luminescent spectroscopy (PSLS) and synchrotron radiation were used to collect the spectral emission and diffraction rings, respectively, from the mechanically loaded samples. The PSLS data and XRD data are shown to be in qualitative agreement that as particle size is increased, the load transferred to the particle also increased for the range of particle sizes tested. This trend of increasing load transfer with increasing particle size is compared with the classical Eshelby model. Results from this work provide experimental insight into the load transfer properties of particulate composites and can serve to experimentally validate the theoretical load transfer models that currently exist.
Identifier: CFE0005326 (IID), ucf:50535 (fedora)
Note(s): 2014-08-01
M.S.A.E.
Engineering and Computer Science, Mechanical and Aerospace Engineering
Masters
This record was generated from author submitted information.
Subject(s): load transfer -- isolated particle -- piezospectroscopy -- photo stimulated luminescent spectroscopy -- x-ray diffraction -- synchrotron
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0005326
Restrictions on Access: public 2014-08-15
Host Institution: UCF

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