Through thickness optimal design of glass-epoxy composite pressure vessel

Abstract

Mechanical loading of pressure vessels mainly comes from pressure (inner and outer) under which is vessel subjected. Tension which appears changes according to the thickness of the wall. Thanks to the its specific structure, by the usage of composite materials in pressure vessels a lot of advantages are got in the field of technology of making, and during the usage, in comparison to some other constructive materials. Their shaping by the need makes it possible to optimize the structure along the thickness. The subject and aim of this work represents calculation and description of numeric model with which the different cases of the work of inner and outer pressure were simulated, for the different thickness of the wall of the pressure vessel of glass epoxy composite. In that way we come to optimal structure of material for different working pressures under which the vessels can be submitted during the usage.

Mehaničko opterećenje kod posuda pod pritiskom uglavnom potiče od pritiska (unutrašnjeg ili spoljnjeg), kome je posuda izložena. Napon koji se usled ovakvog opterećenja javlja menja se po debljini zida. Zahvaljujući specifičnostima svoje strukture, korišćenjem kompozitnih materijala u izradi posuda pod pritiskom obezbeđuje se niz prednosti kako u oblasti tehnologije izrade, tako i u toku same eksploatacije, u odnosu na neke druge konstruktivne materijale. Njihovo oblikovanje po želji omogućava da se na taj način duž debljine ostvari optimizacija strukture. Predmet i cilj ovog rada predstavlja proračun i prikaz numeričkog modela kojim su se simulirali različiti pritisci, za različite debljine i strukture zida posude od staklo-epoksi kompozitnog materijala. Na taj način se mogu dobiti optimalne strukture za različite radne pritiske kojima posude u eksploataciji mogu biti izložene.