Determining the dissipative properties of a flexible pipeline’s material at stretching in the transverse direction taking its structural elements into consideration

This paper reports an experimental study that determines the dissipative properties of a pressure fire hose, type «T», whose inner diameter is 77 mm, under static load conditions, taking into consideration structural elements hose in transverse direction. For this study, samples were separated from different sections hose. The involved both outer fabric reinforced frame and internal waterproofing rubber layer A series field experiments carried out while stretching conditions loading-unloading cycles. tests included 7 cycles, which two-minute interval for material results showed during first two to three materials manifest short-term creep stabilizes modes 4‒7. research approximated by polynomial trend lines. deformation demonstrated curves that, cyclic loading unloading, formed hysteresis loops. When analyzing appropriate curves, it was found first, two-three cycles area loops decreases, second, inclination angle also decreased each subsequent cycle. It established dissipation coefficients stretched direction are significantly reduced test range 0.49 0.37. At (cycles 4–7), stabilize at level 0.18 frame, 0.316