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Date of Publication:2011-01-01

Journal:复合材料学报

Affiliation of Author(s):运载工程与力学学部

Volume:28

Issue:2

Page Number:217-221

ISSN No.:1000-3851

Abstract:Based on thin-wall vessel theory and null-unloading-residual-strain
   assumption, a simplified engineering formula for autofrettage pressure
   of composite overwrapped pressure vessels (COPV) was deduced, in which
   the effects of bilinear isotropic and kinetic hardening behavior for
   metal inner were considered respectively. The validity of the
   engineering formula was verified through comparing with FEM. As an
   example, the residual strain field after autofrettage technique and
   corresponding stress field under the service loading case for a typical
   COPV were studied. The results indicate that the load capacity of COPV
   significantly increases by means of the autofrettage technique provide
   in this paper

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