Fracture analysis of radial scientific instrument module registration fittings of the space telescope

Details Fracture analysis of radial scientific instrument module registration fittings of the space telescope Fracture analysis of radial scientific instrument module registration fittings of the space telescope

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aubu.reptr....s&link_type=abstract

Interim Report, 15 Jan. - 30 Aug. 1985 Auburn Univ., AL. Dept. of Civil Engineering.

Other

Crack Initiation, Crack Propagation, Fittings, Fracture Mechanics, Fractures (Materials), Hubble Space Telescope, Sim, Static Stability, Translational Motion, Focal Plane Devices, Fracture Strength, Stress Analysis, Thermal Insulation

Scientific paper

The space telescope contains various scientific instrument (SI) modules which are mounted to the Focal Plane Structure (FPS) in a statically determinate manner. This is accomplished by using three registration fittings per SI module, one resisting three translations, another resisting two and the third resisting only one. Due to thermal insulating requirements these fittings are complex devices composed of numerous pieces. The structural integrity of these fittings is of great importance to the safety of the orbiter transporting the telescope, so in addition to the stress analyses performed during the design of these components, fracture susceptibility also needs to be considered. The pieces of the registration fittings for the Radial SI Module containing the Wide Field Planetary Camera are examined to determine which would endanger the orbiter if they fractured and what is the likelihood of their fracture. The latter is stated in terms of maximum allowable initial flaw sizes in these pieces.

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