Abstract
A technique for determining the stress distribution in thick plates is developed employing Timpé's solution and specializing it to the case of breechblocks utilized in large-caliber howitzers and cannon. Static and dynamic strains are determined experimentally for the full-scale breechblock and reasonable agreement is obtained.
In all cases predicted values of strain were somewhat higher than those measured experimentally. It is concluded that useful design data can be obtained through use of the techniques described. It is further concluded from the observed static-strain measurements that dynamic effects are negligible.
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Abbreviations
- P :
-
force (lb)
- A :
-
breech-chamber area (in.2)
- p :
-
chamber pressure (lb/in.2)
- q * :
-
pressure loading on breechblock (lb/in.2)
- q :
-
modified pressure loading on breechblock (lbs/in.2)
- a :
-
inner radius of breechblock (in.)
- b :
-
external radius of breechblock (in.)
- c :
-
radius defining limits of breechblock loading function (in.)
- \(\eta _l = h/a\) :
-
ratio of half thickness to inner radius
- \(\rho _l = r/a\) :
-
dimensionless radius
- β=b/a :
-
ratio of external radius to inner radius
- \(\bar \sigma _r = \sigma _r /q\) :
-
dimensionless radial stress
- \(\bar \sigma _\theta = \sigma _\theta /q\) :
-
dimensionless tangential stress
- E :
-
Young's modulus (lb/in.2)
- ν:
-
Poisson's ratio
- \(\varepsilon _\tau\) :
-
radial strain
- \(\varepsilon _\theta\) :
-
tangential strain
Bibliography
A. Timpé, ZAMM Vol. 4, 1924—Achsensymmetrische Deformation von Umdrehungskörpern.
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Weigle, R.E. Dynamic and static analysis of strains in breechblock components of large-caliber weapons. Experimental Mechanics 4, 49–53 (1964). https://doi.org/10.1007/BF02323964
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DOI: https://doi.org/10.1007/BF02323964