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Adhesive Shear Test on Panel : |
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This test is
intended for determining the shear strength of the bond
[adhesive] along tangential direction between the thin
facings and the core of the panel. The test produces failure
in the sandwich panel by shearing off the bond between the
core and the facing. The panel shall have an adhesive shear
strength of minimum 0.7kg/sq cms ( i.e. 630 kg). The
specimen is of size 300x300 mm as shown in fig.
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Flexural test on Panel :
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This
test method pertains to bending of sandwich panel
so that the applied moments produce curvature in
the panel. The test can produce failure in the
sandwich panel in the following ways |
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- By shearing of the core.
- By shearing off the bond between the core & facings.
- By direct compression or tension failure of the
facings.
- By localized wrinkling of thin facings at load points
or reactions.
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Our shelters are easy to move around they can be
lifted or towed .They are suitable for military or
civil transport by road, rail or air .This
mobility results from the light weight and great
rigidity.
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A
panel of size 900 x 400 mm simply supported over a
span of 750 mm as shown in fig., when loaded in
the middle , should withstand an ultimate load
more than or equal to 800 Kgs . |
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Impact Test on Panel : |
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Mobility |
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The purpose of this test is to verify the impact resistance of
wall, floor and roof panels. The sample is a 609 x 609 mm panel
typical of both the wall, floor and roof constructions. It shall
be reinforced along all the four edges with an aluminum alloy
U-frame section. The flange portion of the section shall be
riveted to the skin of the panel with 48 No's of pop rivets spaced
at 100 mm centers. The panel shall be supported along its four
edges by a frame work backed by concrete .The frame shall be made
of four no. of 50 x 100 mm lumber (wood) members rigidly bolted
together to form a square of 609 mm as outside dimension and 100
mm high so that 50 mm face is resting on the ground. The panel
shall be bolted to the frame by two 6 mm bolts per edge. The panel
is then subjected to impact by a 32 Kg steel cyclinder,76 mm in
diameter and hemispherical at one end ,by allowing to fall on its
hemispherical end on to the center of the panel from height of 300
mm. After test, the panel shall be inspected and their shall be no
rupture or denting of the lower skin. (i.e. other side of the
panel.) |
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