Statistical Precision Intervals on Energy Required to Puncture AISI 304L VAR Steel Bar
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Specimens of AISI 304L VAR steel are punctured with AISI 4340 steel probes in a series of drop-table experiments. The times when the probe contacts the specimen and when it breaks through are indicated by the acceleration of the drop-table carriage. The change in the total energy of the carriage between these times is the energy mitigated by each specimen. Precision intervals bounding the energy mitigation provided by the specimens are derived by classical statistical inference. The lower bounds are reasonable because a sufficient number of replications are performed. The adequacy of making predictions about future observations from the population of all possible specimens of identical manufacture based on the normal, log-normal, Weibull, or gamma distribution are evaluated by standard techniques. The normal distribution is considered to fit the mitigated energy data, and the lower bounds in the table below are calculated with it. As an alternative to the statistics, a safety factor of 1.5 may be applied to the sample mean, resulting in a threshold mitigated energy of 21.7 ft-lb.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- DOE Contract Number:
- NA0003525
- OSTI ID:
- 2585620
- Report Number(s):
- SAND--2025-08269R; 1772051
- Country of Publication:
- United States
- Language:
- English
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