THE ELASTIC-PLASTIC WRINKLING OF RECTANGULAR-PLATES SUBJECTED TO LOCALLY UNIFORM TENSION

After overcoming the difficulty with discontinuity in boundary conditions, the pre-buckling elastic stress field for a rectangular plate subjected to locally uniform tension is given. An iteration procedure for solving an elastic-plastic plane stress problem is developed, so as to obtain the pre-buckling elastic-plastic stress field for the same plates. The effects of the aspect ratio of plates, tensile non-uniformity and material properties upon the stress field are also discussed. By assuming the shape of wrinkling region and the wrinkling mode in it, the dependences of critical wrinkling load and the size of wrinkling region upon the material and geometrical parameters are revealed. It is found that wrinkling is dominant by a combined parameter λE = 1 12(1 - v2) E σs t a in elastic case or λp = 1 9 E σs t a in plastic case. © 1990.