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Factors Affecting Bore Resistance in the Structural Analysis of Interior Ballistics

R. CHAPLIN, D. GUBERNAT

Abstract


During analysis of new or existing ammunition the bore resistance profile is of particular importance as it gives the engineer valuable insight into tuning propellant parameters and charge loads. Finite Element Analysis can be a useful tool in estimating bore resistance profiles of conceptual ammunition before the rounds are prototyped and tested. However, many assumptions go into launch models that can affect the bore resistance profile obtained. This presentation covers many of the assumptions made during launch modeling and features within Finite Element Analysis and compares their influence on the obtained bore resistance curve. Factors such as rigid vs. Lagrangian elements, surface smoothing, mesh densities, helical meshing techniques, and results across multiple software packages will be evaluated.

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