Influence of temperature on the high-strain-rate mechanical behavior of PBX 9501
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
High-strain-rate (2000 s{sup {minus}1}) compression measurements utilizing a specially-designed Split-Hopkinson-Pressure Bar have been obtained as a function of temperature from {minus}55 to +50{degree}C for the plastic-bonded explosive PBX 9501. The PBX 9501 high-strain-rate data was found to exhibit similarities to other energetic, propellant, and polymer-composite materials as a function of strain rate and temperature. The high-rate response of the energetic was found to exhibit increased ultimate compressive fracture strength and elastic loading modulus with decreasing temperature. PBX 9501 exhibited nearly invariant fracture strains of {approximately}1.5 percent as a function of temperature at high-strain rate. The maximum compressive strength of PBX 9501 was measured to increase from {approximately}55 MPa at 50{degree}C to 150 MPa at {minus}55{degree}C. Scanning electron microscopic observations of the fracture mode of PBX 9501 deformed at high-strain revealed predominantly transgranular cleavage fracture of the HMX crystals. {copyright} {ital 1998 American Institute of Physics.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 302881
- Report Number(s):
- CONF-970707--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 429; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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