Time-resolved particle velocity measurements at impact velocities of 10 km/s

Conference · Sat Aug 01 04:00:00 EDT 1998

OSTI ID:663280

Furnish, M D; Chhabildas, L C; Reinhart, W D

Hypervelocity launch capabilities (9--16 km/s) with macroscopic plates have become available in recent years. It is now feasible to conduct instrumented plane-wave tests using this capability. Successfully conducting such tests requires a planar launch and impact at hypervelocities, appropriate triggering for recording systems, and time-resolved measurements of motion or stress at a particular point or set of points within the target or projectile during impact. The authors have conducted the first time-resolved wave-profile experiments using velocity interferometric techniques at impact velocities of 10 km/s. These measurements show that aluminum continues to exhibit normal release behavior to 161 GPa shock pressure, with complete loss of strength of the shocked state. These experiments have allowed a determination of shock-wave window transparency in conditions produced by a hypervelocity impact. In particular, lithium fluoride appears to lose transparency at a shock stress of 200 GPa; this appears to be the upper limit for conventional wave profile measurements using velocity interferometric techniques.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 663280
• Report Number(s): SAND--98-0043C; CONF-981109--; ON: DE98007227
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ALUMINIUM
EQUATIONS OF STATE
IMPACT SHOCK
IMPACT TESTS
INTERFEROMETRY
MATERIALS TESTING
PHASE TRANSFORMATIONS
SHEAR PROPERTIES
TEST FACILITIES
TITANIUM
VELOCITY