An isotropic theory for dewettable solids
By: by G.H. Lindsey and J.E. Wood
Contributors: Wood, J. E.; Naval Postgraduate School (U.S.)
Publisher: Naval Postgraduate School
Published: 1971
Place of publication: Monterey, California
Language: eng
Number of pages: 65
Subjects: Solid propellants; Strains and stresses
Description: Fundamental concepts have been formulated for the mechanical behavior of isotropic, elastic materials that dewet. This has been accomplished through an examination of the stability concepts underlying the classical inviscid theory of plasticity. From a phenomenological viewpoint, the two theories differ in the nature of unloading, the dilatation behavior, the form taken by the dewetting criterion, which is analogous to the yield criterion of plasticity theory. Some restrictions to an allowable functional form of the dewetting criterion are developed, and a specific criterion compatible with these restrictions is suggested. A time-temperature superposition method is developed, using the proposed criterion coupled with reaction rate theory. Stress analysis for materials which exhibit anisotropy after dewetting is discussed, and sample problem solutions are given for quasi-elastic pressurization and slow cool-down of an encased hollow cylinder in plane strain, in which the extent of dewetting increases with time. (Author)
Notes: Title from cover.

"31 January 1971"--Cover.

"NPS-57Li71011A"--Cover.

DTIC Identifiers: Solid propellants, dewettable solids.

Author(s) key words: Dewetting, solid propellan, mechanical behavior.

Includes bibliographical references (p. 35-36)

"Approved for public release; distribution unlimited"--Cover.

Technical report; 1971.