| 摘要 |
The inventions relate to the field of machine manufacturing and more specifically, to shell-type construction of base members used in aviation engineering and rocketry, which operate under conditions of combined stressed state, to the methods of and mandrels for their manufacture. A load-carrying tube-shell comprises a cellular framework 1 made of spiral and annular strips 4, 5 crossing each other to define layers 3 of systems repeated over the thickness of the wall thereof so that stiffening ribs 6, 7 with criss-crosses 8, 9, 10 are thus formed, and outer coating layers 2 respectively made of unidirectional filaments 11 bound by a cured polymeric binder 12. Damping-absorbing layers 14 of resilient-elastic material such as rubber or polyurethane are disposed between the layers 3. A method of the manufacture of the tube-shell comprises a step of introducing intermediate continuous forming strips 20 placed beneath the layers 4, 5 laid down under tension. The disclosed mandrel comprises intermediate forming strips 20 of resilient-elastic material doubled with the strips 4, 5 disposed in mutually crossing slots 17, 18, 19. |
