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

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