Numerical Prediction of Residual Stresses in an Overloaded Breech Ring
ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB
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This report describes a numerical technique for predicting the residual stresses in an overloaded breech ring. The numerical approach used is the finite element method based on the incremental stress-strain matrix, for which a computer program is developed. The material behavior is characterized by the von Mises yield criterion, Prandtl-Reuss flow equations and isotropic hardening rule. A piecewise linear representation for the stress-strain curve is used. The numerical results of the stresses in all elements are obtained for four contact conditions. The location and magnitude of the maximum fillet stress are determined as a function of loading. Residual stresses resulting from elastic unloading are calculated. A satisfactory agreement between numerical and experimental results has been reached.
- Solid State Physics