17 research outputs found
Membrane Spin Up in a Normal Gravity Field: Experiments and Simulations
Finite element simulations and experimental observations of the spin up in vacuum of a thin membrane loaded by gravity are presented. The numerical techniques take into account the run time of each simulation and energy convergence; it is shown that accurate results can be obtained quite quickly in a rotating reference frame, and that including stiffness-proportional material damping helps convergence of the integration. It is also found that a very fine finite element mesh around the hub of the membrane is required to obtain consistent results. The experimental setup allows spinning of the membrane in a vacuum box; a measurement technique that uses stereo Digital Image Correlation is presented. A comparison between experiments and simulations using characteristic parameters of the shape of a membrane, i.e. the number of rotational symmetric waves, the average deflection, and the elastic bending strain energy of the membrane, shows good agreement between experiments and simulations
Small satellite deployment mechanisms
Available from British Library Document Supply Centre-DSC:9106.170(CUED/D-STRUCT/TR 190) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo