The machinability of carbon nanotube (CNT)-reinforced polymer composites is studied as a function of CNT loading, in light of the trends seen in their material properties. To this end, the thermo-mechanical properties of CNT composites with different loadings of CNTs are characterized. Micro endmilling experiments are also conducted on all the materials under investigation. Chip morphology, burr width, surface roughness and cutting forces are used as the machinability measures to compare the composites. For composites with lower loadings of CNTs (1.75% by weight), the visco-elastic/plastic deformation of the polymer phase plays a significant role during machining, whereas, at loadings ≥ 5% by weight, the CNT distribution and interface effects dictate the machining response of the composite. The ductile-to-brittle transition and reduction in fracture strength that occurs with an increase in CNT loading, results in reduced minimum chip thickness values, burr dimensions and cutting forces in the CNT composite. The increase in thermal conductivity with the increase in CNT loading, results in reduced number of adiabatic shear bands being observed on the chips and reduced thermal softening effects at high cutting velocities. Thus, overall the increase in CNT loading improves the machinability of the composite.
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ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing
October 7–10, 2008
Evanston, Illinois, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-4852-4
PROCEEDINGS PAPER
Effect of Carbon Nanotube (CNT) Loading on the Thermo-Mechanical Properties and the Machinability of CNT-Reinforced Polymer Composites
Johnson Samuel,
Johnson Samuel
University of Illinois - Urbana-Champaign, Urbana, IL
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Ashutosh Dikshit,
Ashutosh Dikshit
University of Illinois - Urbana-Champaign, Urbana, IL
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Richard E. DeVor,
Richard E. DeVor
University of Illinois - Urbana-Champaign, Urbana, IL
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Shiv G. Kapoor,
Shiv G. Kapoor
University of Illinois - Urbana-Champaign, Urbana, IL
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K. Jimmy Hsia
K. Jimmy Hsia
University of Illinois - Urbana-Champaign, Urbana, IL
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Johnson Samuel
University of Illinois - Urbana-Champaign, Urbana, IL
Ashutosh Dikshit
University of Illinois - Urbana-Champaign, Urbana, IL
Richard E. DeVor
University of Illinois - Urbana-Champaign, Urbana, IL
Shiv G. Kapoor
University of Illinois - Urbana-Champaign, Urbana, IL
K. Jimmy Hsia
University of Illinois - Urbana-Champaign, Urbana, IL
Paper No:
MSEC_ICM&P2008-72028, pp. 203-213; 11 pages
Published Online:
July 24, 2009
Citation
Samuel, J, Dikshit, A, DeVor, RE, Kapoor, SG, & Hsia, KJ. "Effect of Carbon Nanotube (CNT) Loading on the Thermo-Mechanical Properties and the Machinability of CNT-Reinforced Polymer Composites." Proceedings of the ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASME 2008 International Manufacturing Science and Engineering Conference, Volume 2. Evanston, Illinois, USA. October 7–10, 2008. pp. 203-213. ASME. https://doi.org/10.1115/MSEC_ICMP2008-72028
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