Estimation of the allowable pressure of metal liner pressure testing when winding a composite shell

Abstract

Оценка допустимого давления опрессовки металлического лейнера…Инженерный журнал: наука и инновации # 2·2019 3 Оценка допустимого давления опрессовки металлического лейнера…Инженерный журнал: наука и инновации # 2·2019 9 Егоров АнтонWe investigated a liner local buckling as a result of delamination, which can occur at various stages of production, including the cases when the composite tape is wound with tension on the liner. To solve the problem of estimating the allowable pressure of the liner pressure test, a method of two calculations is proposed, the technique is focused on the use of temperature analogy. The method implements the closure of solutions to the contact pressure and stability of the liner through a common parameter which is the hoop stress in the liner in stressed state zone, this state is close to homogeneous. The contact pressure of the multi-ply composite shell on the liner is determined by the value of the specified tension of the composite tape wound. The liner stability calculation was carried out in the LS-DYNA software package in a dynamic formulation when specifying the cooling of the outer shell. Delamination computing for the middle part of a cylindrical metal composite high-pressure vessel was performed. We show both variants: (i) with the liner peeling from the composite shell and (ii) without delamination.