Strength of an Explosively-Formed Bond

Report No. ARL-TR-3889
Authors: William S. de Rosset; Daniel J. Snoha; and Michael A. Minnicino
Date/Pages: September 2006; 30 pages
Abstract: A test fixture used to determine the shear strength of an explosively-formed bond between a liner and gun tube is described. Tests were carried out in which the liner material yielded before the bond was broken. A finite-element analysis of the deformation indicated that the bond shear strength was in excess of 45 ksi. Internal stress measurements made by x-ray diffraction indicated the presence of residual hoop and radial stresses produced by the explosive bonding process. The hoop stresses at and near the bore were comparable to those achieved with the autofrettage process in a larger gun tube. The residual radial stress, along with frictional forces, may account for a large portion of the bond shear strength.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2006