A Probabilistic Finite Element Analysis of Residual Stress Formation in Shrink-Fit Ceramic/Steel Gun Barrels
Abstract
The development of residual stresses in a hybrid -SiC-lining/CrMoV-steel jacket gun barrel during shrink fitting of the jacket over the lining is studied using a probabilistic finite element analysis. A particular attention is given to understanding the development of the axial compressive stress in the ceramic lining since this stress (if sufficiently high) can prevent lining failure caused by formation and growth of circumferential cracks near the barrel ends. To quantify the effect of variability in various design, materials, and processing parameters on the magnitude and the distribution of the axial residual stress, a probabilistic structural analysis approach, known as the Advanced Mean Value (AMV) method, is used which enables determination of the cumulative distribution function for failure of the lining. The results obtained are validated using the Adaptive Importance Sampling method, an efficient direct statistical sampling technique. Lastly, the corresponding sensitivity factors which quantify the effect of variability in each parameter on the magnitude of axial residual stresses in the ceramic lining are computed. The results indicate that the loss of the compressive axial stress in the lining near the barrel ends is to a greatest extent affected by the magnitude of the friction coefficient at the lining/barrel interface.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2002
- Accession Number
- ADA597263
Entities
People
- J. R. Delong
- Mica Grujicic
- W. S. Derosset
Organizations
- United States Army Research Laboratory