Publication Date:
2019-07-13
Description:
The reliability of two graphite-epoxy stiffened panels that contain uncertainties is examined. For one panel, the effect of an overall bow-type initial imperfection is studied. The size of the bow is assumed to be a random variable. The failure mode is buckling. The benefits of quality control are explored by using truncated distributions. For the other panel, the effect of uncertainties in a strain-based failure criterion is studied. The allowable strains are assumed to be random variables. A geometrically nonlinear analysis is used to calculate a detailed strain distribution near an elliptical access hole in a wing panel that was tested to failure. Calculated strains are used to predict failure. Results are compared with the experimental failure load of the panel.
Keywords:
STRUCTURAL MECHANICS
Type:
NASA-TM-107687
,
NAS 1.15:107687
,
ATCOM-TR-92-B-015
,
ASME Winter Annual Meeting: Symposium on Reliability Technology; Nov 08, 1992 - Nov 13, 1992; Anaheim, CA; United States
Format:
application/pdf
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