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Dynamic heterogeneous response of aluminum and copper to stress waves

Conference ·
OSTI ID:5962795
Holographic interferometry is used to measure the time- and space-resolved dynamic response of materials to stress waves. For free surface accelerations in the range - 10/sup 11/ cm/sec/sup 2/ to 10/sup 10/ cm/sec/sup 2/ and pressures less than 2 GPa we find that the grain structures of the polycrystalline metals aluminum and copper are correlated to the observed heterogeneous response. The response depends on the grain size, whether the material is being compressed or unloaded from a shock-compressed state and the rate of compression and decompression. Other factors, such as material strength, viscosity, and wave interactions, that may influence heterogeneous response are discussed.
Research Organization:
Sandia National Labs., Albuquerque, NM (USA)
DOE Contract Number:
AC04-76DP00789
OSTI ID:
5962795
Report Number(s):
SAND-83-1432C; CONF-830719-15; ON: DE83015229
Country of Publication:
United States
Language:
English