Evaluation of the Friability Test (Evaluatie van de Friability Test),
Abstract
In co-operation with SNPE, France, the friability test has been constructed. This test is applied to determine the effect of impact on an explosive substance which is a candidate to be assigned as an Extremely Insensitive Detonating Substance (EIDS). In this test a sample is directed against a steel plate with a velocity of about 150 m/s with the use of a gas gun. After having performed this test, the explosive is tested in the closed vessel' test to assess any changes in the burning characteristic, i.e. the peak pressure and pressure rise rate, due to the impact. The volume of the existing closed vessel' needed to be adjusted in order to fulfil the calibration requirements with respect to peak pressure (80 +/- 0.2 MPa) and pressure rise rate (not more than 15.2 +/- MPa/msec). This calibration was performed using a reference propellant delivered by SNPE. It appears that both calibration requirements could not be met by the 'closed vessel'. The requirement for the peak pressure could be fulfilled, but not for the pressure rise rate. Nine experiments were satisfactory performed using the friability test. Of two explosives, a standard rocket propellant and a PBX-HMX propellant, the burning characteristics were determined with the 'closed vessel' test. Both propellants broke into numerous pieces in the friability test. Nevertheless the results obtained from the 'closed vessel' test show that both the peak pressure and the pressure rise rate are moderate compared to the reference propellant.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1997
- Accession Number
- ADA323423
Entities
People
- B. J. Van Der Meer
- J. H. Scholtes
Organizations
- Prins Maurits Laboratorium TNO