<DOC>
<DOCNO>
840
</DOCNO>
<TITLE>
analysis of partly wrinkled membrane .
</TITLE>
<AUTHOR>
stein,m. and hedgepeth,j.m.
</AUTHOR>
<BIBLIO>
nasa tn.d813, 1961.
</BIBLIO>
<TEXT>
  a theory is derived to predict the stresses and deformations of
stretched-membrane structural components for loads under which part of
the membrane wrinkles .  rather than studying in detail the deformations
in the wrinkled region, the present theory studies average displacements
of the wrinkled material .  specific solutions of problems in flat and
curved membranes are presented .  the results of these solutions show
that membrane structures retain much of their stiffness at loads substantially
above the load at which wrinkling first occurs .
</TEXT>
</DOC>
