Preliminary Experiments on the Propagation of Plastic Deformation
Abstract
In a recent report, von Karman develops a theory of the propagation of plastic deformation in solids that may open the way to a systematic interpretation of a great many impact and penetration problems in which plastic deformations of beams, plates and armor are involved. The present report describes experiments that have been made with the object of testing the assumptions of the theory and that provide data on: (1) the existence of a plastic wave front of a given amplitude, (2) the relation between the velocity of impact and the amplitude of the plastic wave front, and (3) the shape of the plastic wave and the velocity of propagation of the plastic front. The experiments show that the theory is able to describe, along general lines, the process of the propagation of deformation in solids. In particular, the theoretically predicted relation between the velocity of impact and the resulting maximum plastic deformation checks quite well with the experiments. The actual shape of the plastic wave is found to be at some variance with the theoretically obtained curves and hence needs further explanation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1942
- Accession Number
- ADB280760
Entities
People
- P. E. Duwez