ESDU 95026:2012

ESDU 95026 introduces two computer programs for calculating the
surface strains in a sandwich panel with isotropic faceplates and a
bevelled edge that allows for a solid edge strip around the panel
through which the panel is attached to a stiff substructure. The
theory accounts for the membrane strain that is introduced into the
inner faceplate by the rotation of the bevelled edges. ESDUpac
A9526 calculates the rms strain on the panel solid edge on the
attachment line at the centre of the longer side. To allow
correlation of measured and predicted data, a simulated strain
gauge reading may be obtained accounting for location and length of
the gauge. The faceplates must be of equal thickness and the panel
is assumed to vibrate in its fundamental mode. ESDUpac B9526
calculates the ratio of the strains in the centre of the two
faceplates. The faceplates need not be of equal thickness and the
analysis applies to any mode having an odd number of half waves
across the width. A sketch shows a comparison of measured results
for edge strains extracted from the literature with predictions
from the program. Details of the input and output are explained and
illustrated by worked examples.