Application of critical COD and plastic instability concepts to fracture of shellsThe paper deals with the initiation, growth, and possible arrest of fracture in shell structures containing initial defects which may be approximated by an isolated part-through crack. The main study is restricted to the structures in which the net section of the shell wall around the defect zone is fully yielded. The problem is solved by using an 8th order shallow shell theory with a conventional plastic strip model to account for the plastic deformations. Using the critical COD or the plastic instability as fracture criterion, the results are applied to the fracture propagation and arrest in shells. The calculated results are then compared with those obtained from the experiments on zircaloy, aluminum, and steel pipes.
Document ID
19740043943
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Erdogan, F. (Lehigh University Bethlehem, Pa., United States)
Ratwani, M. (Northrop Corp. Hawthorne, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
April 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 74-391
Meeting Information
Meeting: Structures, Structural Dynamics and Materials Conference