There was a factor of 2 missing in Eq. (36) in the original paper [1] and this error in Eq. (36) has propagated throughout the rest of the paper [1]. For the sake of brevity, only the affected equations are listed in the following:
$U=2·M2l2EI=π2lEI$
(36)

$π2lEI=EBlq$
(37)

$lq=π2EIEB1l$
(38)

$lT=l+π2EIEB1l≥2l·π2EIEB1l=2πEIEB$
(39)

$lcr=4πEIEB=4πreqx=12.5664reqx$
(40)

$U1=2·M12l1...$

References

References
1.
Mikata
,
Y.
,
2010
, “
Approximate Solutions for a Self-Folding Problem of Carbon Nanotubes
,”
ASME J. Eng. Mater. Technol.
,
132
, p.
011013
.10.1115/1.3184084
2.
Zhou
,
W.
,
Huang
,
Y.
,
Liu
,
B.
,
Hwang
,
K. C.
,
Zuo
,
J. M.
,
Buehler
,
M. J.
, and
Gao
,
H.
,
2007
, “
Self-Folding of Single- and Multiwall Carbon Nanotubes
,”
Appl. Phys. Lett.
,
90
, p.
073107
.10.1063/1.2535874