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1

Effect of ply angle on the burst pressure of composite pressure vessels by filament winding

Saif Tamara, Saad Najim, Al-Zubiedy Ali, Idzikowski Adam

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2022

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Vol. 11

223--233

EN

A composite pressure vessel is an important structure in different applications including pipes, pipes under pressure and closed system pipes under high pressure and temperature such as gas pipelines and aircraft structures, because of the characteristics of polymer - a composite used as an alternative to heavy materials such as metal in the various applications, including the construction industry. The current work focuses on the study of strength phase orientation and their properties on the burst pressure strength and other parameters, which are very important in the design and manufacture of these vessels such as the selection of type of strength phase nylon 6, 6 and philosophy of mixing of the type of fiber with matrix material (epoxy). The work also includes the study of the effect of two layer angle ply (0, 90), (55, -55), (75, -75) and implements different material testing to evaluate the toughness and stiffness of these vessels and compare the experimental result with the theoretical result. A filament winding apparatus was designed and executed to manufacture different types of subjects according to these angle of ply nylon fiber. The mechanical tests (tensile test, drop test, pipe stiffness test, hydrostatic pressure test) were used to test the vessel. The results shown that the ply orientation (75, -75) has high (tensile strength, toughness, stiffness, impact and burst pressure) when compared with the results from other ply orientations. This shows that [75, -75] ply orientation is the optimal angle for the vessel. Tensile tests show that (75, -75) ply orientation samples have higher properties in two directions, longitudinal and transverse, when compared with other angles.

2

Fracture of laminated woven GFRP composite pressure vessels under combined low-velocity impact and internal pressure

Sharifi S., Gohari S., Sharifiteshnizi M., Alebrahim R., Burvill C., Yahya Y., Vrcelj Z.

Archives of Civil and Mechanical Engineering

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2018

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Vol. 18, no. 4

1715--1728

EN

Dome curvatures of pressure vessels often sustain highest level of stresses when subjected to various loading conditions. This research is aimed at investigating the effect of dome geometrical shape (hemispherical, torispherical, and ellipsoidal domes) on mechanical deformation and crack length of laminated woven reinforced polymer (GRP) composite pressure vessels under low-velocity impact (LVI) (case one) or combination of LVI and internal pressure (case two). The study is based on finite element (FE) simulations with laboratory-based experimental validation studies. It was observed that the maximum vertical displacements () and crack length along the diameter of deformation (a) are both of lower magnitude in case one. Damage intensity and fracture differ for different combinations of loading. Only matrix breakage and debonding occurs in case one and fiber breakage occurs in case two. The dome geometric shapes used in this study were found to be invariant to both damage intensity and failure modes. Irrespective of the type of load applied, the magnitude of and crack length correlate with dome geometric shape as the maximum and the minimum occur in torispherical and hemispherical domes, respectively. The maximum and the minimum crack lengths also take place in torispherical and hemispherical domes, respectively.

3

Wyznaczanie odkształcenia resztkowego oraz próba karbu w kompozytowych zbiornikach wysokociśnieniowych

Błażejewski W., Gąsior P., Kaleta J., Rybczyński R.

Czasopismo Techniczne. Mechanika

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2009

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R. 106, z. 1-M

19-22

PL

Zaprezentowano test ISO 11439, A11,2, wyznaczania odkształcenia resztkowego kompozytowego zbiornika typu CNG-3, wzmocnionego włóknem węglowym. Wyniki badań są bardzo ważnym źródłem informacji dla projektującego zbiornik. Zaprezentowano także niestandardowe badania wpływu karbu na wytrzymałość zmęczeniową zbiornika. Wyniki badań podważają zasadność testu zgodnie z ISO11439 oraz wskazują na znaczny zapas wytrzymałości zbiorników typu CNG-3 w razie poważnego uszkodzenia kompozytu a także nie eksplodowania w razie utraty szczelności w sposób zmęczeniowy.

EN

The paper presents tests of ISO 11439, A11,2, to the residual deformation of CFR pressure vessel, for CNG storage (type-3). The results are giving very important information for composite vessel designer. The paper presents non-standard flaw tests and its influence (flaw) on fatigue life of CNG vessel. The tests results undermine flaw test according to the ISO 11439 regulation and show for an significant reserve of durability for CNG type 3 vessels in case of serious damage in composite layer and non-explosive character of the fatigue tightness loss.

4

Poszukiwania optymalnej struktury zbiorników kompozytowych wykonywanych z użyciem nawijarki sterowanej numerycznie

Błażejewski W., Domański M., Rybczyński R., Wiewiórski P.

Czasopismo Techniczne. Mechanika

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2009

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R. 106, z. 1-M

15-18

PL

Wykorzystując wieloletnie doświadczenie zespołu, zaprojektowano i wykonano nawijarką czteroosiową sterowaną numerycznie. Układ sterowania elektronicznego jest wyposażony w kartę APCI-8001 firmy ADDI-DATA. Algorytm oprogramowania wykorzystuje metodą tablicową [3] i pracuje w systemie operacyjnym Microsoft Windows 2000/XP. Na nawijarce wykonywane są rury i zbiorniki próbne o różnorodnych strukturach w grupie [3]. Takie struktury są trudne do wykonania na nawijarkach przemysłowych i komercyjnych, ponieważ pracują według innego algorytmu.

EN

Using long term experiences of team the four axis and numerical filament winding machine was designed and made. The electronic control system is equipped with APCI-8001 card ADDI-DATA company. The algorithm of applied software uses matrix method [3] and works in Microsoft Windows 2000/XP operating system. Using the winding machine the pipes and the vessels specimens with different structures in group [3] are made. This type of structures are difficult to made with industrial winding machines. It arises from different algorithm of commercial machines.

5

Metodyka doboru struktury kompozytowego oplotu nośnego zbiorników wytwarzanych metodą nawijania

Błażejewski W.

Czasopismo Techniczne. Mechanika

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2009

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R. 106, z. 1-M

9-14

PL

Wyznaczano eksperymentalnie optymalną strukturę ścianki nośnej zbiorników kompozytowych. W celach porównawczych zostały wykonane zbiorniki ciśnieniowe o różnej strukturze nawijania. Pozostałe parametry (takie jak kąt, grubość ścianki, udział żywicy i włókien szklanych) pozostały te same. Następnie zostały przeprowadzone badania ciśnieniowe. Odkształcenia mierzone na linii zgrupowania przeplotów struktury Nr 1 były około dwa razy mniejsze od odkształceń mierzonych w obszarach pomiędzy liniami.

EN

The optimal structure of composite wall of pressure vessels was experimentally determined. For that purpose the comparative composite pressure vessel with different winding structures (fig. 2) were made. Other winding parameters (like angle, composite wall thickness, content of resin and glass fibers) were the same. Pressure vessels were burst tested. The smallest deformations (strains) for structure no. 1 were registered in an area of interleaving lines, whereas the biggest ones were between these lines. For other structures and the same pressure values such extreme strain field distributions were not observed.