| A Simulation Process for Determining Reliability of Cyclic Random Loaded Structures, |
JUN 1984 |
25 pages |
| Authors:
D. Neal; W. Matthews; T. DeAngelis; ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
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 | A unique application of the Monte Carlo method was developed for determining reliability vs. cycles to failure of the M60 tank torsion bar. In applying the method, material torsional fatigue and spectrum loads were modelled such that variability in the functional parameters and operational loads were represented. Random torsional displacement values obtained from the amplitude displacement distributions applied to the fatigue equations resulted in an exponential distribution for cycles to ... |
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| An Efficient Method for Determining the A and B Design allowables, |
21 SEP 1982 |
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| Authors:
D. Neal; L. Spiridigliozzi
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 | Suggested statistical procedures for obtaining material A and B allowables from both complete and censored samples are outlined in this paper. The allowables represent a value determined from a specified probability of survival with a 95% confidence in the assertion. It is demonstrated from a variety of materials test data that allowable determinations require prior application of exploratory data analysis procedures in order to assure acceptable results. (Author, modified). |
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| Design Allowable Determination on a Fully Characterized Composite Material, |
06 APR 81 |
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| Authors:
R. M. Lamothe; B. M. Halpin Jr.; D. Neal
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| The results of a pilot program for obtaining design allowables for the purpose of updating the MIL HDBK 17A are described. The material used in the study, an S-2 glass impregnated with SP-250 resin, was analyzed by a variety of techniques prior to being fabricated into 2 foot square plates. The plates were press cured and were laid up by hand into unidirectional or pi over 4 orientation. Specimens were ... |
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| Structural Integrity Assessment of Filament-Wound Components, |
15 APR 1974 |
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| Authors:
E. M. Lenoe ; D. Neal
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| This paper summarizes the results of a structural integrity assessment of filament-wound glass-epoxy cylinders and rocket motor cases under conditions of dynamic fracture due to internal pressure loadings of the order of 10-ms duration. Experiments were completed on four types of fiber glass configurations; straight cylinders of various angle ply orientations, tapered cylinders, and two bonded rocket motor case designs were evaluated. A brief review is provided of techniques to ... |
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