Shock characterization of epoxy: 42 volume percent glass microballoons
In the late 1960's, a series of shock experiments were done on ceramic-filled epoxies. The results from the shock characterization of these mixtures were compared to unfilled epoxy with {rho}{sub 0} = 1.185 g/cm{sup 3}. In that the volume percent fill was kept essentially constant, the shock Hugoniots formed a consistent family of curves relative to their initial densities. The present study examined the shock characteristics of an anhydride-cured epoxy (Epon 828 base) filled with approximately 42 volume percent glass microballoons (GMB) with a density of 0.94 g/cm{sup 3}. The Hugoniot relationship was determined between the shock pressures of 0.5 and 4.2 GPa. A light-gas gun was used to impact samples of the epoxy-GMB material onto targets of known impedance and known Hugoniot equation. A Velocity Interferometer System for Any Reflector (VISAR) laser interferometer system was used to measure the particle velocity in the known target material. From the measured projectile velocity and the Hugoniot of the known material, the particle velocity, shock velocity and pressure in the epoxy-GMB was determined. The Hugoniot relationship of the epoxy-GMB material is compared to those of the previous mixtures. A comparison of the epoxy-GMB material to a porous epoxy is also made. Shock attenuation studies were also done on this material. It was found that the shock wave profile consisted of an elastic and a plastic wave due to the initial strength of the glass microballoons, 0.24 GPa; the crushing of the glass microballoons, and the final state of dense epoxy, containing a small amount of glass. This material fits the P-{alpha} model very well. 12 refs., 15 figs., 6 tabs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6109448
- Report Number(s):
- SAND-90-1018; ON: DE91009616
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EPOXIDES
IMPACT SHOCK
SHOCK WAVES
GLASS
POTTING MATERIALS
ATTENUATION
BALLOONS
COMPARATIVE EVALUATIONS
CURING
DENSITY
EXPERIMENTAL DATA
INTERFEROMETERS
MIXTURES
POROUS MATERIALS
POTTING
PRESSURE MEASUREMENT
RANKINE-HUGONIOT EQUATIONS
RESINS
TARGETS
VELOCITY
AIRSHIPS
DATA
DISPERSIONS
EQUATIONS
INFORMATION
MATERIALS
MEASURING INSTRUMENTS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
POLYMERS
360603* - Materials- Properties