Abstract
Abstract
A technique is presented for accurate determination of the flexural stiffness of thin plates using optical holography. Measurements of the interference fringes on thin rhombic plates in anticlastic bending are used to calculate the components of curvature by a simple numerical method Control experiments on a metal plate give good agreement with the results of small deflection bending theory. The method appears ideally suited to the measurement of anisotropic flexural stiffness properties.
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References
1.
Nadai
A.
Die Elastiche Platten , 1925 (Springer , Berlin ).
2.
Snell
M. B.
‘Initial buckling of some CFRP structures and the validity of classical plate theory predictions’ , RAE Technical Report 79128, 1979 .
3.
Ashton
J. E.
Halpin
J. C.
Petit
P. H.
Primer on composite materials: Analysis , 1969 (Technomic Publishing , Stanford, CT ).
4.
Timoshenko
S. P.
Woinowsky-Krieger
S.
Theory of plates and shells , (2nd edition) 1959 (McGraw-Hill , New York ).
5.
Marchant
M. J.
‘Holographic interferometry of CFRP honeycomb panels’ , RAE Technical Report 73192, 1973 .
6.
Archbold
E.
Ennos
A. E.
Virdee
M. S.
‘The deformation of steel bars in a four-point bending machine, measured by holographic interferometry’ , NPL Report MOM 27, 1977 .
7.
Allman
D. J.
‘Variation theory for large displacement bending of thin plates’ , RAE Technical Report 80108, 1980 .
8.
Searle
G. F. C.
Experimental Elasticity , 1908 (The University Press , Cambridge ).
9.
Ashwell
D. G.
‘The antoclastic curvature of rectangular beams and plates’ , J. Roy. Aeronaut. Sci. , 1950 , November.
10.
Bartholemew
P.
Private communication .