Microsecond duration pressure pulse generator for in situ dynamically loaded SEM fracture studies
Abstract
We describe a technique to impulse load small cylindrical specimens for in situ, real‐time SEM studies of dynamically loaded fracture. Loading is done magnetically with a solenoidal coil of 10 mm length and 1 mm radius. The entire loading assembly fits on the SEM stage; there is no need for shock‐isolated bellows apparatus. The only vacuum feedthrough required is an MHV coaxial bulkhead connection. A ballistic pendulum measurement gave a peak compressive pressure of ∼20 MPa, with a pressure pulse width of 1.33 μs. Pressures > 80 MPa can easily be generated. Using this device we have obtained real‐time SEM movies of dynamically loaded fracture of rosin.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 01, 1992
- Source ID
- 10.1002/sca.4950140307
Entities
People
- B. H. Fishbine
- R. J. Macy
Organizations
- Air Force Office of Scientific Research