Pii: S0020-7683(96)00200-4
نویسندگان
چکیده
Al~tract--By employing the second-order Noether's theorem, several new invariant integrals have been derived for the non-linear shallow shell--the Marguerre-von K~irm~in shell. The dynamic effect is considered in the derivations. These invariant integrals are path-independent over the projection image of the middle surface of the shell in a Cartesian plane, in which the projection area of the middle surface of the shallow shell is maximum. The proposed invariant integrals can be used to evaluate the asymptotic field around a defect embedded in the shell. Unlike most other studies, the Lagrangian density of the invariant variational principle used here belongs to a mixed type variational principle. © 1997 Elsevier Science Ltd.
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