The soft deformable metallic rotating band of large caliber projectiles prevents the gas leakage between the gun tube wall and the shell body by the band pressure on contact surfaces during the launch cycle of the gun. High rotating band pressures can lead to problems concerning gun tube wear, fatigue, and strength. The effects of changes in construction of rotating band and long range artillery projectile shell body on gun tube loading are studied experimentally. A practical analysis method for tube inner wall pressure computation from outer wall strain measurements is presented. The method is based on assuming stepped pressure load affecting on tube inner wall surface, when the projectile passes the measurement point. Although the analysis method was simplified, it was found to give useful and reliable results for comparative verification of different shell and band structures and their influences on gun tube loading. The structural design of the shell body and the rotating band were shown to be the most important aspects to cause the extreme loadings on the gun tube.

Issue Section:
Research Papers
Keywords:
gun tube, rotating band, pressure, strain
Topics:
Gun barrels, Pressure, Projectiles, Wear

References

1.
Drysdale
,
W. H.
, and
Burns
,
B. P.
, 1988, “
Structural Design of Projectiles
,”
Gun Propulsion Technology
,
L.
Stiefel
, ed.,
AIAA
,
Washington, DC
, Vol.
109
, pp.
133
–
159
.
2.
Renström
,
R.
 1976, “
Beräkning av de mekaniska spänningarna i en 30 mm spränggranat vid gördelforceringen samt vid tryckmaximum i vapnet
,” Försvarets Forskninganstalt FOA, Stockholm, 29 p, Report No. C 20138-D2.
3.
Avitzur
,
B.
, 1983, “
Engraving of Rotating Bands—A Modification of Metal-Flow Pattern
,” Benet Weapons Laboratory, Watervliet, NY, 30p, Report No. ARLCB-TR-83019.
4.
Andrews
,
T. D.
, 2005, “
Projectile Driving Band Interactions With Gun Barrels
,”
Gun Tubes 2005 Conference, GT2005, Conference Proceedings
. Keble College, Oxford, RMCS, Shrivenham, Paper No. S7/P28 (also in: J. Pressure Vessel Technol., 128(2), May 2006. pp.
273
–
278
).
5.
Flynn
,
P. D.
, 1975, “
Strain-Gage Instrumentation for Ammunition Testing
,”
Exp. Mech.
,
1975
, pp.
192
–
200
.
6.
Moilanen
,
S.
, and
Tervokoski
,
J.
, 2006, “
Raskaan kranaatinheittimen laukauspaineen mittausmenetelmien vertailu
,”
Proceedings of the IX Finnish Mechanics Days
,
R.
Von Hertzen
 and
T.
Halme
, eds.,
Lappeenranta University of Technology Department of Mechanical Engineering
,
Lappeenranta
, June 13–14, 2006, pp.
201
–
213
, Report No. 17.
7.
Toivola
,
J.
,
Moilanen
,
S.
, and
Jussila
,
H.-R.
, 2011, “
Force, Pressure and Strain Measurements for Traditional Heavy Mortar Launch Cycle
,”
J. Struct. Mech.
,
44
(
4
), pp.
309
–
329
.
8.
Keinänen
,
H.
,
Moilanen
,
S.
,
Toivola
,
J.
, and
Tervokoski
,
J.
, 2011, “
Influence of Rotating Band Construction on Gun Tube Loading: Numerical Approach
,”
Gun Tubes Conference 2011
,
Cranfield University, Defence Academy of UK
,
Shrivenham
, Apr. 11-12, 2011, Paper No. S4/17a, GT2011.
9.
Ness
,
L.
, and
Williams
,
A. G.
, eds., 2006,
Jane’s Ammunition Handbook 2006–2007
,
Jane’s Information Group Ltd.
,
Coulsdon
.
10.
Chen
,
P. C. T.
, 2000, “
Analysis of Engraving and Wear in a Projectile Rotating Band
,”
Proceedings of the Ninth U.S. Army Symposium on Gun Dynamics
,
L. C.
Kathe
, ed.,
Benet Laboratories
,
Watervliet, NY
, pp.
2
-1–2-
12
, Report No. ARCCB-SP-99015.
11.
Montgomery
,
R. S.
, 1975, “
Surface Melting of Rotating Bands
,” Benet Weapons Laboratory, Watervliet, NY, Technical Report No. WVT-TR-75060.
12.
Montgomery
,
R. S.
, 1983, “
Evidence for the Melt-lubrication of Projectile Bands
,” Benet Weapons Laboratories, Watervliet, NY, Technical Report No. ARLCB-TR-83031.
13.
Ekbom
,
L.
, and
Persson
,
B.
, 1984, “
Metallografisk Undersökning Av Gördlar till 7,5 cm Artillerigraneter
,” Försvarets Forskninganstalt FOA, Stockholm, Report No. C 20551-D2.
14.
Balakin
,
V. A.
, 1989, “
Friction and Wear in Rifled Artillery Gun Barrels
,”
Soviet J. of Friction and Wear
,
10
(
3
), pp.
100
–
106
.
15.
Chung
,
K.
,
Lee
,
R.
,
Readdy
,
A.
, 2000, “
Improved 155 mm Rotating Band for Extended Range
,”
Proceedings of the Ninth U.S. Army Symposium on Gun Dynamics
,
L. C.
Kathe
, ed.,
Benet Laboratories
,
Watervliet, NY
, pp.
3
-1–3-
10
, Report No. ARCCB-SP-99015.
16.
Schauer
,
A. M.
, 2000, “
Projectile Rotating Band Wear Model
,”
Proceedings of the Ninth U.S. Army Symposium on Gun Dynamics
,
L. C.
Kathe
, ed.,
Benet Laboratories
,
Watervliet, NY
, pp.
4
-1–4-
9
, Report No. ARCCB-SP-99015.
17.
Lisov
,
M.
, 2006, “
Modeling Wear Mechanism of Artillery Projectiles Rotating Band Using Variable Parameters of Internal Ballistics Process
,”
Sci. -Tech. Rev.
,
LVI
(
2
), pp.
11
–
16
. Available at: http://www.vti.mod.gov.rs/ntp/rad2006/2-06/liso/liso.pdfhttp://www.vti.mod.gov.rs/ntp/rad2006/2-06/liso/liso.pdf
Copyright © 2012
 by American Society of Mechanical Engineers
You do not currently have access to this content.