Transitional failure of hybrid carbon nanotubes under multiaxial loads

• Published in: Physica. E, Low-dimensional systems & nanostructures Vol. 53; pp. 95 - 100
• Main Authors: Jeong, Byeong-Woo, Kim, Hye-Young
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2013; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Filling; Functionalization; Hybrid carbon nanotubes; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of nanoscale materials; Multiple failure modes; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanotubes; Physics; Tensile failure; Torsional buckling; Torsional buckling; Hybrid carbon nanotubes; Tensile failure; Filling; Functionalization; Multiple failure modes; Molecular dynamics method; Theoretical study; Carbon nanotubes; Mechanical properties; Carbon; Singlewalled nanotube; Nanostructured materials
• ISSN: 1386-9477; 1873-1759
• DOI: 10.1016/j.physe.2013.04.028

Transitional failure envelopes of hybrid single-walled carbon nanotubes functionalized by functional groups and filled with butane molecules under combined tension–torsion are predicted using classical molecular dynamics simulations. The observations reveal that while the tensile failure load decreases with combined torsion, the torsional buckling moment increases with combined tension. As a result, the failure envelopes under combined tension–torsion are definitely different from those under pure tension or torsion. In such combined loading, there is a multitude of failure modes (tensile failure and torsional buckling), and the failure therefore exhibits the feature of transitional failure envelopes. In addition, the functionalization by functional groups decreases both tensile failure load and torsional buckling moment, while filling with butane molecules increases only the torsional buckling moment. Consequently, the transitional failure envelopes of functionalized and filled nanotubes are absolutely different relative to what is predicted for pristine nanotubes. •Multiple failure modes of hybrid carbon nanotubes are examined under combined loads.•Failure loads under combined loading are different from those under uniaxial loading.•Functionalization decreases both tensile failure load and torsional buckling moment.•Filling with butane molecules increases only the torsional buckling moment.