摘要
Using a generalized quasi-continuum method,we characterize the post-buckling morphologies and energetics of thick multi-walled carbon nanotubes(MWCNTs)under uniaxial compression.Our simulations identify for the first time evolving post-buckling morphologies,ranging from asymmetric periodic rippling to a helical diamond pattern.We attribute the evolving morphologies to the coordinated buckling of the constituent shells.The post-buckling morphologies result in significantly reduced effective moduli that are strongly dependent on the aspect ratio.Our simulation results provide fundamental principles to guide the future design of high-performance,MWCNT-based nanodevices.
基金
We gratefully acknowledge support from the National Science Foundation(NSF)grants under Awards Nos.0826841 and 0600642(Clark V.Cooper,program manager)
and K.J.H.acknowledges NSF financial support under Grant Nos.CMMI 09-52565 and CMMI 09-06361.