CHARACTERISTIC DYNAMIC STRENGTH RATIO AS THE LIMITING PARAMETER IN SHOCK DESIGN,
Abstract
The dynamic strength ratio of a structure is defined as the ratio of the dynamic yield strength (a number determined by multiplying the static yield strength times a dynamic loading factor) of the structural material to the maximum fiber stress in the structure when it is subject to the acceleration of gravity alone (one g). Dynamic strength ratios for bending and buckling are derived and plotted versus frequency for three types of beams, respectively modeled as single degree of freedom systems. The strength ratio plots are superimposed on sample shock spectra to illustrate which regions of the spectra are appropriate for the design of each type of beam. This comparison of the strength ratio curves and the shock spectra indicates that a specific shock spectrum amplitude is suitable for the elastic design of a given type of structure only if the dynamic strength ratio is greater than or equal to the spectrum amplitude. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 02, 1965
- Accession Number
- AD0624438
Entities
People
- Henry C. Mayo
Organizations
- United States Naval Research Laboratory