A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter

A micromechanics computational algorithm for fibrous composites including fiber, matrix and interface is introduced to study the impact of interface on composite behavior. The domains are modeled by finite elements with the interface simulated by cohesive zone elements. The constitutive of the cohes...

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Main Author: Syed, Ataur Rahiman
Format: Others
Published: North Dakota State University 2017
Online Access:https://hdl.handle.net/10365/26634
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spelling ndltd-ndsu.edu-oai-library.ndsu.edu-10365-266342021-09-28T17:11:31Z A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter Syed, Ataur Rahiman A micromechanics computational algorithm for fibrous composites including fiber, matrix and interface is introduced to study the impact of interface on composite behavior. The domains are modeled by finite elements with the interface simulated by cohesive zone elements. The constitutive of the cohesive zone behavior is extracted from the experimental traction-separation relations. By implementing this model under different loading conditions, significant difference in the composite behavior is observed with different cohesive zone laws and different fiber waviness. The composite strength and stiffness for the examined cases are compared to experimental data and are in good agreement. The procedure is then extended to study the impact of adhesion on brain axonal injury. The constituents of the brain tissue are modeled as linear viscoelastic materials. This micromechanical model has been implemented to study the impact of adhesion and waviness on the stiffness and viscous behavior of brain tissue with respect to time. 2017-10-16T20:23:31Z 2017-10-16T20:23:31Z 2012 text/thesis https://hdl.handle.net/10365/26634 NDSU Policy 190.6.2 https://www.ndsu.edu/fileadmin/policy/190.pdf application/pdf North Dakota State University
collection NDLTD
format Others
sources NDLTD
description A micromechanics computational algorithm for fibrous composites including fiber, matrix and interface is introduced to study the impact of interface on composite behavior. The domains are modeled by finite elements with the interface simulated by cohesive zone elements. The constitutive of the cohesive zone behavior is extracted from the experimental traction-separation relations. By implementing this model under different loading conditions, significant difference in the composite behavior is observed with different cohesive zone laws and different fiber waviness. The composite strength and stiffness for the examined cases are compared to experimental data and are in good agreement. The procedure is then extended to study the impact of adhesion on brain axonal injury. The constituents of the brain tissue are modeled as linear viscoelastic materials. This micromechanical model has been implemented to study the impact of adhesion and waviness on the stiffness and viscous behavior of brain tissue with respect to time.
author Syed, Ataur Rahiman
spellingShingle Syed, Ataur Rahiman
A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
author_facet Syed, Ataur Rahiman
author_sort Syed, Ataur Rahiman
title A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
title_short A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
title_full A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
title_fullStr A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
title_full_unstemmed A Micromechanical Procedure to Characterize the Effect of Interface in Fibrous Composites and Brain White Matter
title_sort micromechanical procedure to characterize the effect of interface in fibrous composites and brain white matter
publisher North Dakota State University
publishDate 2017
url https://hdl.handle.net/10365/26634
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