Nondestructive Analysis of MK 607 Harpoon Missile container.
Abstract
Structural failures of the upper shell assembly of MK 607 HARPOON missile storage containers were investigated using analysis and experiment. The two failure modes considered were cracking in the center of the container panels and cracking and delamination near the stiffener-panel interface. Nondestructive load tests were performed on an actual container for two types of load cases: internal vacuum and externally applied concentrated loads. Finite element structural analyses were conducted to determine deflections and stresses in the container under these loading conditions. Analytically predicted deflections agreed well with experimentally measured values. The most likely cause of the panel cracking was determined to be the result of the container cover being deflected downward onto the missile support saddle bolts. This study does not identify a cause for the cracking and delamination occurring near the stiffener-panel interface implementation of operational procedures which preclude the HARPOON containers from being loaded from the exterior are recommended. Potential benefits resulting from a redesign of the missile support saddle bolt configuration should also be investigated. It is also recommended that the geometry and material properties of the stiffener be defined more precisely to facilitate a more accurate study of its behavior. Keywords: Nondestructive evaluation; Fiber reinforced plastics; Structural shells; Structural analysis; Load tests. (EDC)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1987
- Accession Number
- ADA195807
Entities
People
- D. J. Pomerening
- J. W. Cardinal
- S. A. Dobosz
Organizations
- Southwest Research Institute