Estimating the cohesive zone model parameters for carbon nanotube-polymer interface using inverse finite element approach

Lingyun Jiang, Chandra Nath, Johnson Samuel, Shiv G. Kapoor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

During machining of carbon nanotube (CNT)-polymer composites, the failure of the polymer elements occurs at the CNT-polymer interface. The interfacial behavior that can be represented by a cohesive zone model (CZM) is mainly influenced by two parameters, viz., interfacial strength and fracture energy. The objective of this study is to estimate these two specific CZM parameters using an inverse finite element (FE) simulation approach that works based on an iterative error minimization procedure. Nanoindentation tests have been conducted on a CNT-polyvinyl alcohol (PVA) composite sample containing 4 wt% multi-walled nanotubes (MWNTs). A 2D axisymmetric FE model of nanoindentation has been developed. This micro-structure based model considers the CNT, the PVA, and the cohesive zone of interface as three individual phases. The unknown interfacial parameters are determined by minimizing the error between the simulation load-displacement curve and the experimental results. The interfacial strength and the fracture energy at the CNT-PVA interface are estimated to be approximately 40 MPa and 16e-3 J/m2, respectively. This approach provides a convenient framework to understand the role of the CZM parameters at the interface between the CNT and polymer matrix.

Original languageEnglish (US)
Title of host publicationASME 2012 International Manufacturing Science and Engineering Conference Collocated with the 40th North American Manufacturing Research Conf. and in Participation with the Int. Conf., MSEC 2012
Pages907-916
Number of pages10
DOIs
StatePublished - Dec 1 2012
EventASME 2012 International Manufacturing Science and Engineering Conference, MSEC 2012 Collocated with the 40th North American Manufacturing Research Conference and in Participation with the International Conference - Notre Dame, IN, United States
Duration: Jun 4 2012Jun 8 2012

Publication series

NameASME 2012 International Manufacturing Science and Engineering Conference Collocated with the 40th North American Manufacturing Research Conference and in Participation with the Int. Conf., MSEC 2012

Other

OtherASME 2012 International Manufacturing Science and Engineering Conference, MSEC 2012 Collocated with the 40th North American Manufacturing Research Conference and in Participation with the International Conference
CountryUnited States
CityNotre Dame, IN
Period6/4/126/8/12

Keywords

  • CNT-polymer interface
  • Cohesive zone model
  • Interfacial parameters
  • Inverse finite element analysis

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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