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contributor authorJiang, Lingyun
contributor authorNath, Chandra
contributor authorSamuel, Johnson
contributor authorKapoor, Shiv G.
date accessioned2017-05-09T01:09:59Z
date available2017-05-09T01:09:59Z
date issued2014
identifier issn1087-1357
identifier othermanu_136_03_031004.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/155472
description abstractThe 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%.
publisherThe American Society of Mechanical Engineers (ASME)
titleEstimating the Cohesive Zone Model Parameters of Carbon Nanotube–Polymer Interface for Machining Simulations
typeJournal Paper
journal volume136
journal issue3
journal titleJournal of Manufacturing Science and Engineering
identifier doi10.1115/1.4024941
journal fristpage31004
journal lastpage31004
identifier eissn1528-8935
treeJournal of Manufacturing Science and Engineering:;2014:;volume( 136 ):;issue: 003
contenttypeFulltext


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