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The Five-Point Loading Shear Stiffness Test

Published online by Cambridge University Press:  04 July 2016

H. B. Howard*
Affiliation:
Ministry of Aviation

Extract

The shear stiffness of a beam in bending is commonly determined by measuring the central deflection δ in a three-point loading test for a range of values of the span L under a constant central load. The value of bending stiffness, EI, and shear stiffness, GA, can then be obtained by plotting δ/L against L2 and drawing the best straight line through the points so obtained. The slope of this line for unit central load is then 1/48EI and its intercept on the δ/L axis is 1/4GA on the simple “Engineer's” theory.

Type
Technical Notes
Copyright
Copyright © Royal Aeronautical Society 1962

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