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Viscoelastic stresses in a composite system
Author(s) -
Hackett Robert M.
Publication year - 1971
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760110309
Subject(s) - polyphase system , viscoelasticity , materials science , composite number , stress field , stress (linguistics) , field (mathematics) , principal stress , mechanics , composite material , structural engineering , mathematics , finite element method , physics , engineering , shear stress , electronic engineering , linguistics , philosophy , pure mathematics
Abstract A large number of composite materials are polyphase systems in which one phase exhibits time‐dependent properties. This paper presents an analysis of the stress redistribution in such a viscoelastic material system under the influence of applied external loads. In order to perform this study an appropriate idealized model, a series of which would tend to approximate the composition of a polyphase material, is formulated. The solution of the time‐dependent stress field is obtained by applying the “correspondence principle” to the elastic stress field solution which, for the selected model, has previously been obtained in numerical form. Application of the solution to a model of an actual polyphase composite material system yields results which clearly indicate that, under certain normally encountered conditions of external loading, the principal stresses in certain areas of such a system will increase significantly with time.