- Author : National Aeronautics and Space Administration (NASA)
- Publisher : Createspace Independent Publishing Platform
- Release : 2018-07-02
- ISBN : 9781722189259
- Pages : 30 pages
Effect of Bow Type Initial Imperfection on Reliability of Minimum Weight Stiffened Structural Panels
Download or read book Effect of Bow Type Initial Imperfection on Reliability of Minimum Weight Stiffened Structural Panels written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computations were performed to determine the effect of an overall bow-type imperfection on the reliability of structural panels under combined compression and shear loadings. A panel's reliability is the probability that it will perform the intended function - in this case, carry a given load without buckling or exceeding in-plane strain allowables. For a panel loaded in compression, a small initial bow can cause large bending stresses that reduce both the buckling load and the load at which strain allowables are exceeded; hence, the bow reduces the reliability of the panel. In this report, analytical studies on two stiffened panels quantified that effect. The bow is in the shape of a half-sine wave along the length of the panel. The size e of the bow at panel midlength is taken to be the single random variable. Several probability density distributions for e are examined to determine the sensitivity of the reliability to details of the bow statistics. In addition, the effects of quality control are explored with truncated distributions. Stroud, W. Jefferson and Krishnamurthy, Thiagaraja and Sykes, Nancy P. and Elishakoff, Isaac Langley Research Center RTOP 505-63-53-01...