ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The dynamic buckling caused by propagation of a stress wave in single-wall carbonnanotube subjected to impact torque is investigated. The single-wall carbon nanotube is modeled by acylindrical shell with semi-infinite length, and the dynamic buckling under impact torque is reducedto a bifurcation problem caused by the propagation of torsion stress wave. The bifurcation problemcan be converted to solving a group of nonlinear algebraic equations. The numerical computation iscarried out, and the effects of the different parameters on dynamic buckling are discussed. It is foundthat if critical buckling time of the carbon nanotube is different, the corresponding buckling model isdifferent, too. Relation between the critical buckling stress and the critical buckling time is given.Molecular-dynamic simulations of torsional deformation of a single-wall carbon nanotube have beenused to obtain the critical buckling strain, which is 0.064. In this work, the critical buckling strainobtained by the continuum model is 0.061, which is very close to the value 0.064. Single-wall carbonnanotubes have very much powerful anti-impact torque, and the critical buckling shearing stress canreach up to 132GPa
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.65.pdf
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