0
Special Section: Micromanufacturing

A Microstructure-Level Material Model for Simulating the Machining of Carbon Nanotube Reinforced Polymer Composites

[+] Author and Article Information
Ashutosh Dikshit, Johnson Samuel, Richard E. DeVor, Shiv G. Kapoor

Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801

J. Manuf. Sci. Eng 130(3), 031110 (May 12, 2008) (8 pages) doi:10.1115/1.2917564 History: Received July 18, 2007; Revised February 25, 2008; Published May 12, 2008

A continuum-based microstructure-level material model for simulation of polycarbonate carbon nanotube (CNT) composite machining has been developed wherein polycarbonate and CNT phases are modeled separately. A parametrization scheme is developed to characterize the microstructure of composites having different loadings of carbon nanotubes. The Mulliken and Boyce constitutive model [2006, “Mechanics of the Rate Dependent Elastic Plastic Deformation of Glassy Polymers from Low to High Strair Rates  ,” Int. J. Solids Struct., 43(5), pp. 1331–1356] for polycarbonate has been modified and implemented to capture thermal effects. The CNT phase is modeled as a linear elastic material. Dynamic mechanical analyzer tests are conducted on the polycarbonate phase to capture the changes in material behavior with temperature and strain rate. Compression tests are performed over a wide range of strain rates for model validation. The model predictions for yield stress are seen to be within 10% of the experimental results for all the materials tested. The model is used to study the effect of weight fraction, length, and orientation of CNTs on the mechanical behavior of the composites.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Proposed material modeling strategy

Grahic Jump Location
Figure 2

TEM image of a MWCNT

Grahic Jump Location
Figure 11

CNT distribution in aligned composites: (a) simulated and (b) experimentally fabricated (27)

Grahic Jump Location
Figure 12

Two-way diagrams for significant interaction effects

Grahic Jump Location
Figure 3

(a) TEM image of Composite A (b) TEM image of Composite B (c) TEM image of Composite C (4)

Grahic Jump Location
Figure 4

Parametrization of CNTs

Grahic Jump Location
Figure 5

Statistical distribution of parameters

Grahic Jump Location
Figure 6

Procedure to simulate the composite microstructure

Grahic Jump Location
Figure 7

(a) Simulated microstructure of Composite A (b) Simulated microstructure of Composite B

Grahic Jump Location
Figure 8

Model prediction of PC elastic modulus curve at strain rates ranging from 10−4∕sto104∕s

Grahic Jump Location
Figure 9

PC uniaxial compression curves (experimental versus predicted)

Grahic Jump Location
Figure 10

(a) Composite A uniaxial compression curves (experimental versus predicted) (b) Composite B uniaxial compression curves (experimental versus predicted)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In