Estimating the Cohesive Zone Model Parameters of Carbon Nanotube–Polymer Interface for Machining SimulationsSource: Journal of Manufacturing Science and Engineering:;2014:;volume( 136 ):;issue: 003::page 31004DOI: 10.1115/1.4024941Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The failure mechanisms encountered during the machining of carbon nanotube (CNT) polymer composites are primarily governed by the strength of the CNT–polymer interface. Therefore, the interface should be explicitly modeled in microstructurelevel machining simulations for these composites. One way of effectively capturing the behavior of this interface is by the use of a cohesive zone model (CZM) that is characterized by two parameters, viz., interfacial strength and interfacial fracture energy. The objective of this study is to estimate these two CZM parameters of the interface using an inverse iterative finite element (FE) approach. A microstructurelevel 3D FE model for nanoindentation simulation has been developed where the composite microstructure is modeled using three distinct phases, viz., the CNT, the polymer, and the interface. The unknown CZM parameters of the interface are then determined by minimizing the root mean square (RMS) error between the simulated and the experimental nanoindentation load–displacement curves for a 2 wt. % CNT–polyvinyl alcohol (PVA) composite sample at room temperature and quasistatic strain state of up to 0.04 s−1, and then validated using the 1 wt. % and 4 wt. % CNT–PVA composites. The results indicate that for welldispersed and aligned CNT–PVA composites, the CZM parameters of the interface are independent of the CNT loading in the weight fraction range of 1–4%.
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contributor author | Jiang, Lingyun | |
contributor author | Nath, Chandra | |
contributor author | Samuel, Johnson | |
contributor author | Kapoor, Shiv G. | |
date accessioned | 2017-05-09T01:09:59Z | |
date available | 2017-05-09T01:09:59Z | |
date issued | 2014 | |
identifier issn | 1087-1357 | |
identifier other | manu_136_03_031004.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/155472 | |
description abstract | The failure mechanisms encountered during the machining of carbon nanotube (CNT) polymer composites are primarily governed by the strength of the CNT–polymer interface. Therefore, the interface should be explicitly modeled in microstructurelevel machining simulations for these composites. One way of effectively capturing the behavior of this interface is by the use of a cohesive zone model (CZM) that is characterized by two parameters, viz., interfacial strength and interfacial fracture energy. The objective of this study is to estimate these two CZM parameters of the interface using an inverse iterative finite element (FE) approach. A microstructurelevel 3D FE model for nanoindentation simulation has been developed where the composite microstructure is modeled using three distinct phases, viz., the CNT, the polymer, and the interface. The unknown CZM parameters of the interface are then determined by minimizing the root mean square (RMS) error between the simulated and the experimental nanoindentation load–displacement curves for a 2 wt. % CNT–polyvinyl alcohol (PVA) composite sample at room temperature and quasistatic strain state of up to 0.04 s−1, and then validated using the 1 wt. % and 4 wt. % CNT–PVA composites. The results indicate that for welldispersed and aligned CNT–PVA composites, the CZM parameters of the interface are independent of the CNT loading in the weight fraction range of 1–4%. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Estimating the Cohesive Zone Model Parameters of Carbon Nanotube–Polymer Interface for Machining Simulations | |
type | Journal Paper | |
journal volume | 136 | |
journal issue | 3 | |
journal title | Journal of Manufacturing Science and Engineering | |
identifier doi | 10.1115/1.4024941 | |
journal fristpage | 31004 | |
journal lastpage | 31004 | |
identifier eissn | 1528-8935 | |
tree | Journal of Manufacturing Science and Engineering:;2014:;volume( 136 ):;issue: 003 | |
contenttype | Fulltext |