Pipe laminated composite composite reinforced with increased dimensional stability

摘要

The invention relates to a combined rigid reinforced pipes of large diameter dimensionally with high efficiency, intended for use in high pressure piping during transportation of liquid products. The main technical result - an increase dimensionally (CTE α _y = 0,1⋅10 ^-6 K ^-1) highly loaded composite pipe, while also providing the required strength and stiffness with high internal working pressures in the pipe due to the combined use uglestekloplastika material with strictly oriented fiber structure. Technical result is achieved by using as a power carrier material layered composite pipe (or hybrid) composite material - steklougleplastika with strict structure reinforcement fibers at a volume fraction of fibers of 60%. Useful highly loaded model of the layered combined composite reinforced pipe of large diameter with high dimensional stability characterized by structural hollow cylindrical bilayer scheme in which an inner layer of the combined composite material - glass fiber - based on the EU-17-1200-350 steklorovinga brand STR 5952-002-83458713- 20015 and polymeric epoxy binder-MD brand EHD TU V3-734-87, the outer layer of the combined composite material - carbon fiber - carbon fiber March and Toray T700SC and polymeric epoxy binder-MD brand EHD TU V3-734-87, with an inner diameter of 400 to 3200 mm; with a safety factor of strength of the pipe is not less than 4.5; with the possibility of operating at a working internal pressure from 4 to 40 MPa; with the possibility of operating at temperatures from -60 to + 110 ° C; limiting the strength of the pipe wall under tension in the axial direction is not less than 25% of the tensile strength in the circumferential direction; with strictly aligned structure reinforcement fibers at a volume fraction of 60% fiber in the composite material highly loaded tube wall, a ratio of layers of fiberglass and carbon fiber, respectively 60% and 40%, with angles of general structure combined reinforcement of the composite material - uglestekloplastika (± 35,3 ° / ± 65,2 °) - relative to the axial direction of the tube: while fiberglass monolayers (SP) - ± 35,3 °, monolayers CFRP (UP) - ± 65,2 °; with parameters α CTE values circumferential _y = -0,1 × 10 ^-6 K ^-1 and the circumferential modulus of elasticity E _y = 35.6 GPa. In this case also the advantage of the proposed utility model is monolithic structural envelope with increased dimensional stability, and its production process rationality. 6 yl.