A REVIEW OF EFFECTIVE PLATING TO BE USED IN THE ANALYSIS OF STIFFENED PLATING IN BENDING AND COMPRESSION
A survey is made of the influence of structural stiffening members on the behavior of plating which is subjected to loads which cause bending or compression. The work is divided into three parts. The first part covers shear lag effects associated with the bending of stiffened plates. Part II examines the effective "width" of unstiffened plate elements in compression. The concepts considered are: how maximum plate strength is affected by initial distortion, normal pressure and boundary conditions; stress distribution in plate elements before failure; "reduced effective width" for defining plate element stiffness, as required for use in stiffened-plate collapse theories. The difficulty of reconciling theory with practice justifies a semiempirical approach to the problem based on test results from plates. Equations are presented which are recommended for predicting the average values of plate strength and stiffness. These equations are valuable for a statistical treatment of the subject. However, researchers and designers are urged not to be too influenced by just a few test points and many results are necessary before confidence can be established. Further, two of the recommended equations were established for a stiffened-plate assembly. However, collapse may very well occur by some form of stiffener failure before the edge stress in the plate elements has reached the yield stress of the material, as commonly supposed. Part 3 concerns welding stress effects, and a critical strain theory is advanced for describing welded plate behavior. Appropriate test data is assessed, including that from three full-scale destroyer tests. Some emphasis has been placed upon the statistical characteristics of the data, in order that this may help establish structural strength distributions for probabilistic approaches to ductile structural reliability.
Massachusetts Institute of TechnologySea Grant Program, 77 Massachusetts Avenue
Cambridge, MA United States 02139
- FAULKNER, D
- Publication Date: 1973-6-15
- Pagination: 69 p.
- TRT Terms: Buckling; Deformation; Plates (Engineering); Stiffened plates; Stresses; Structural analysis; Welds
- Old TRIS Terms: Plate deformation; Weld stresses
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00046671
- Record Type: Publication
- Source Agency: Massachusetts Institute of Technology
- Report/Paper Numbers: MITSG 73-11
- Files: TRIS
- Created Date: Sep 18 1974 12:00AM