Wind angle

For simplified buildings or in cases where detailed modeling is not practical, simplified tables of coefficients are presented by Liddament for low-rise buildings with two building shapes, for open and sheltered buildings, and for various walls and approach wind angles.ASHRAE also summarizes results from other studies. ... 

High winding angle. Complete coverage of mandrel each pass of carriage. Reversal of carriage can be made at any time without affecting pattern. 

Figure 2. Two-dimensional representation of Case 1 dwell calculation. The helical wind angle is A and the band width of the roving is B. ...

In Tsai [7], an elasticity solution for stresses in a pressurized thick cylindrical vessel is presented. In this analysis, the longitudinal bending deformation due to end closures is neglected, the formulation of the elasticity problem then reduces to a generalized plane strain analysis. The effects of material selection, layup sequence, and winding angles on the burst strength of thick multilayered cylinders are also addressed. 

The circular dichroism of polynucleotides at 275 nm is a linear function of both the helix winding angle and the base pair twist.103 Measurement of CD spectra on large polynucleotides or large molecular aggregates... 

Attention focuses on the cylindrical section of the hydrogen vessel subjected to internal pressure with close-end effect loading (Figure 1). The itmer radius Rq and its thickness e are constant. The vessel strength is ensured by Ug layers of filament wound composite. The k layer is characterised by its thickness ep(k) and winding angle P(k). The radial, the hoop and the axial coordinates are respectively denoted by r, 0 and z. Regarding at the usual assumption, the displacement fields is expressed as ... 

This geometry of this problem inspires a description in terms of cylindrical coordinates, within which a plausible form for the displacements is the assumption that, like a helical ramp in a parking garage, the displacements increase linearly in the winding angle, 6, yielding the solution... 

Similar machinery required as for helix with narrow ribbon. Take-up device for slack fibers is necessary if cross-feed on carriage is not used. Cross-feed on carriage is required for very low winding angles. 

Angle Winding angle is the angular measured in degrees between the direction parallel to the filaments and an established reference. It is usually the centerline through the polar bosses, that is, the axis of rotation. 

Slip angle pattern Angle at which a tensioned fiber will slide off the filament wound dome. If the difference between the wind angle and the geodesic angle is less than the slip angle, the fiber will not slide off the dome. Slip angles for different fiber-plastic systems vary and must be determined experimentally. 

---