RESEARCH ON ENERGY ABSORBING STRUCTURES. PART X

An analytical method for predicting the elastic-plastic bending of rectangular plates with large deflection is studied. The effects of plastic strain and large deflection on plate deformation are shown to be the same as a set of applied external forces on the plate in the classical elastic small deflection theory. For the plate considered, the deflection is increased only slightly by plastic strain; however, the maximum extreme fiber stress is considerably relieved by plastic yielding. A method is developed for a solution of the stress field in a semi-infinite elastic-plastic medium under a generalized plane deformation. The slip field and the build-up of local plastic strain at the free surface under cyclic loading are calculated. This local plastic strain build-up is used as the criterion for estimating early fatigue damage. Active slip on secondary slip systems is considered during fatigue cycling.

• Corporate Authors:

  Ara Incorporated

  ,    
• Authors:
  • Maxelsky, B
  • Hewitt, R R
  • Lin, T H
  • Lin, S R
• Publication Date: 1972-2

Media Info

• Pagination: 101 p.

Subject/Index Terms

• TRT Terms: Deflection; Elastic deformation; Failure; Mechanical elasticity; Mechanical fatigue; Plastic deformation; Structural plates
• Old TRIS Terms: Elastic fatigue; Plate deflections
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00040935
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: AFOSR-TR-72-0714 Final Rpt
• Contract Numbers: F44620-71-C-0043
• Files: TRIS
• Created Date: Feb 23 1973 12:00AM