  An isolated positive wedge disclination deforms an initially flat elastic
sheet into a perfect cone when the sheet is of infinite extent and is
elastically inextensible. The latter requires the elastic stretching strains to
be vanishingly small. In this paper, rigorous analytical and numerical results
are obtained for the disclination induced deformed shape and stress field of a
bounded F{\"o}ppl-von K{\'a}rm{\'a}n elastic sheet with finite extensibility,
while emphasising the deviations from the perfect cone solution. In particular,
the Gaussian curvature field is no longer localised as a Dirac singularity at
the defect location whenever elastic extensibility is allowed and is
necessarily negative in large regions away from the defect. The stress field,
similarly, has no Dirac singularity in the presence of elastic extensibility.
However, with increasing Young's modulus of the sheet, while keeping the
bending modulus and the domain size fixed, both of these fields tend to develop
a Dirac singularity. Noticeably, in this limiting behaviour, inextensibility
eludes the bounded elastic sheet due to persisting regions of non-trivial
Gaussian curvature away from the defect. Other results in the paper include
studying the effect of specific boundary conditions (free, simply supported, or
partially clamped) on the Gaussian curvature field away from the defect and on
the buckling transition from the flat to a conical solution.
