Probabilistic Models of Gun-Tube Fatigue Based on a Fracture-Mechanics Model.
Abstract
Two probabilistic models of gun tube fatigue have been recently developed by adding probabilistic elements to a deterministic model of fatigue failure. These probabilistic models are examined to determine if they give adequate representations when certain questionable assumptions are lifted. In addition, the deterministic model is cast into a more general probabilistic framework, and the effects of certain statistical assumptions are examined. Monte Carlo simulation studies are conducted to approximate possible distributions for gun tube fatigue lives. These generated distributions are compared to various theoretical distributions to determine their adequacy in representing fatigue data. A randomizing method of selecting distributions for material properties of the gun tube is used to give some independence from unwarranted assumptions. Results of the simulation studies indicate that the lognormal distribution generally gives the best fit to the fatigue lives, but in most cases the lognormal distribution can be rejected by goodness-of-fit tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1977
- Accession Number
- ADA052692
Entities
People
- E. E. Coppola
Organizations
- United States Army Armament Research, Development and Engineering Center