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Fatigue analysis of mini-mast space trussThe functional, structural adequacy of a 20 meter long generic space truss (Mini-Mast), subjected to fatigue loading, was examined with respect to the failure modes which are most likely to occur during services. The space truss is made of thin-walled tubes having unidirectional, zero degree layups of Celanese G50 graphite fibers/Narmco 5217 epoxy composites. The approach used to investigate the most probable failure mode of the truss under fatigue loading is to determine the stress level, including the types of stress, in the member first, then followed by failure mode analysis based on the stress level just determined. To begin, an approximate beam-parameter truss (BPT) model is analyzed first, followed by a detailed analysis of the truss using a finite element model (FEM) run with NASTRAN code. The response results of the BPT model are used to compare FEM results and to check any major deviation of trend derived from the FEM. The purpose of the work was to search available fatigue data of the tube material, to conduct approximate dynamical stress analysis of the BPT model, to run detailed dynamical stress analysis of the FEM model using NASTRAN code, and to predict the fatigue life of the truss member based on limited fatigue data.
Document ID
19900015736
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hwang, Shoi Y. (South Carolina State Coll. Orangeburg, SC, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1989
Publication Information
Publication: Old Dominion Univ., NASA/American Society for Engineering Educ
Subject Category
Structural Mechanics
Accession Number
90N25052
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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