The objective of this paper is to estimate the torsional rigidity 'GJ'flexural rigidity 'EI' and transverse shear stiffness 'KGA' of sandwich beams. For this purpose, sandwich beams various configurations are fabricated and tested under tip twisting moment and tip point loads. All the tests are conducted under fixed-free conditions. The strains and displacements are measured at various locations of the beams. The torsional rigidities of sandwich beams are estimated using shear strain versus load data and deflection versus load data. Flexural stiffness 'EI' is computed using both load versus deflection and load versus strain data and 'KGA' is calculated using load versus deflection curve. The torsional rigidities are also computed using the multi-cell approach and elasticity approach. The relationship for the elastic curve of sandwich beams subjected to tip load is also derived. The theoretical predictions are also compared with the test data. A realistic value of shear correction factor 'K'and computation of transverse shear stiffness 'GA' that leads to accurate predictions for sandwich beams is also proposed.
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