Erosion Modeling of the High Contraction Chromium Plated Crusader Gun System

Thermal-chemical- mechanical erosion modeling predictions are given for the high contraction chromium plated Crusader gun system based on extensive cannon firing, inspection, characterization, and experimental data. This effort was conducted for the Army's Crusader Program Manager Office and ma...

Full description

Saved in:
Bibliographic Details
Main Authors: Sopok, S, Rickard, C, Pflegl, G, O'Hara, P, Dunn, S
Format: Report
Language:English
Subjects:
ACCURACY
ADDITIVES
BORES
CHROMIUM ALLOYS
CONFIDENCE LEVEL
ENGRAVING
EROSION
EXPERIMENTAL DATA
FIRING RATE
FIRING TESTS(ORDNANCE)
FLASHES
FUSES(ELECTRICAL)
GAGES
GUN BARRELS
GUN CHAMBERS
Guns
HIGH RATE
LIMITATIONS
LOSSES
MALFUNCTIONS
MECHANICAL PROPERTIES
Mechanics
PREDICTIONS
PRESSURE
ROTATING BANDS
SCENARIOS
STARS
THERMAL PROPERTIES
WEAR
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Thermal-chemical- mechanical erosion modeling predictions are given for the high contraction chromium plated Crusader gun system based on extensive cannon firing, inspection, characterization, and experimental data. This effort was conducted for the Army's Crusader Program Manager Office and managed by Applied Ordnance Technology. The authors carefully protect proprietary technical data that was provided by various government and nongovernment partners involved in this effort. Key gun system details include the 155-mm 56 caliber rifled XM297 cannon with a 1400 In(3) chamber, zone six combustible case-type modular artillery charge, triple-base propellant, an approximately 100-pound M549-like projectile, its nominal obturator, maximum chamber pressure of approximately 55 kpsi, 0.005-inch thick high contraction chromium plate on both the lands and grooves of the steel, ambient temperature conditioning, no in-wall barrel cooling, decopperlng and flash additives, and no wear additives. This XM297 gun system can be condemned on erosion due to loss of velocity, fuse malfunction, rotating band wear, excessive body engraving, and loss of accuracy. A provisional 0.105-inch diametric origin erosion limit (usually at 12:00 to 6:00 peak) applies in the absence of these condemning effects as measured by pullover or star gages. Most key cannons were near this provisional diametric erosion limit and were destructively characterized resulting in moderately high confidence erosion predictions. Thermal and erosion predictions are made for five different firing rate scenarios from 1 round per hour to 8 rounds per minute. For the I round per hour firing rate scenario, we predict that it requires approximately 1520 EFCs to achieve arbitrary 0.100-inch wall erosion at the 12:00 o'clock peak eroded origin position and 1005 EFCs to achieve arbitrary 0.100-inch diametric erosion at the 12:00 to 6:00 o'clock peak eroded origin position. Presented at the 38th AIAA Joint Propulsion Conference, Indianapolis, IN, 7-10 Jul 2002.