Response of porous beryllium to static and dynamic loading
Previous investigations of the mechanical response of porous materials to dynamic loading have been extended to include the shock wave response of brittle metal. The complex response of berylliums of 10-15% porosity in two initial conditions has been examined in a theoretical and experimental program to be described. The study has resulted in the development of constitutive relations placed in hydrocodes which are capable of accurately predicting wave propagation in the berylliums. A comprehensive set of static (0 to 4 Gpa) and dynamic (0 to 44 Gpa) experiments was performed to measure the behavior of these brittle, porous materials to imposed loads. The results of the experiments guided a modeling effort which added several new features to previous models, including deviatoric stresses, porosity-dependent relaxation time of pore closure, elastic-plastic reopening of pores, and improved compaction functions.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7317217
- Report Number(s):
- UCRL-79712(Rev.1); CONF-770706-19
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALKALINE EARTH METALS
BERYLLIUM
COMPRESSIBILITY
DIAGRAMS
ELEMENTS
EQUATIONS
EQUATIONS OF STATE
IMPACT SHOCK
MECHANICAL PROPERTIES
METALS
PHASE DIAGRAMS
POROSITY
SHOCK WAVES
SINTERED MATERIALS
WAVE PROPAGATION