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Dome Forming

The manufacture of hemispherical domes is well established, particularly in the field of composites, as a method of assessing the relative ability of the materials and processes to produce doubly curved shell components. In the case of knitted fabric-reinforced thermoplastics, some of the key parameters relevant to product manufacture are (i) material strain behavior (stretching V5. draw-in), (ii) surface finish, (iii) gross wrinkling and buckling of the sheet material, and (iv) interply shear in the laminate. [Pg.269]


Since the dome formed is a free surface it may be assumed to have a constant thickness, /... [Pg.483]

Particles are ejected into the freeboard via two basic modes (1) ejection of particles from the bubble roof and (2) ejection of particles from the bubble wake, as illustrated in Fig. 9.19. The roof ejection occurs when the bubble approaches the surface of the bed, and a dome forms on the surface. As the bubble further approaches the bed surface, particles between the bubble roof and surface of the dome thin out [Peters et al., 1983]. At a certain dome thickness, eruption of bubbles with pressure higher than the surface pressure takes place, ejecting the particles present on top of the bubble roof to the freeboard. In wake ejection, as the bubble erupts on the surface, the inertia effect of the wake particles traveling at the same velocity as the bubble promptly ejects these particles to the freeboard. The gas leaving the bed surface then entrains these ejected particles to the freeboard. [Pg.401]

The materials with highest 13C concentrations are several carbonates from carbonaceous chondrites. Carbonates from the cap rock of salt domes, formed bacterially from CaS04 and oxidized organic substances, show strong 13C... [Pg.163]

Figure 13.5. Isometric view of a grid of pile caps and a series of domes forming a vault spanning between them (Hewlett Randolph 1988). Figure 13.5. Isometric view of a grid of pile caps and a series of domes forming a vault spanning between them (Hewlett Randolph 1988).
Bhattacharyya et al. [26] showed that wood fibre-polypropylene composites are indeed formable. The sheets they manufactured used pinus radiate fibres along with polypropylene powder, for a total through thickness of 1.3 mm. Two types of composites were made, layered and homogeneous with polypropylene and wood fibres mixed during formation. Results showed a tensile modulus increase of up to 250% with a 25-30% fibre mass fraction. Several formability tests were studied, dome forming with matched die and cup drawing being most relevant. For both... [Pg.669]

The basic technique of using domes formed from acrylic sheet as skylights was developed in the 1950s and represented one of the earliest commercial applications of acrylic plastic. [Pg.19]

Dome. Surface of Dome Forms 9one-half Oblate spheroid with di = 67.5 bi = 39.75 from Ref. 6 pgl7, formula for surface area. [Pg.384]

Refractory spherical domes form hinges at the base region of the dome (7), one at the skewback and one a short distance up from the skew as illustrated in Figure 5. This dome is restrained radially at the skew. The skew is in turn supported radially by a cylindrical steel shell and vertically by the cylindrical wall lining not shown. Other refractory dome investigations (8) have shown that the... [Pg.481]


See other pages where Dome Forming is mentioned: [Pg.138]    [Pg.551]    [Pg.138]    [Pg.138]    [Pg.551]    [Pg.151]    [Pg.1429]    [Pg.191]    [Pg.138]    [Pg.114]    [Pg.138]    [Pg.319]    [Pg.208]    [Pg.27]    [Pg.27]    [Pg.842]    [Pg.134]    [Pg.356]    [Pg.134]    [Pg.356]    [Pg.266]    [Pg.268]    [Pg.269]    [Pg.269]    [Pg.271]    [Pg.271]    [Pg.272]    [Pg.272]    [Pg.383]    [Pg.2382]    [Pg.2386]    [Pg.2387]    [Pg.408]   


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