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Mechanics of Composite Materials. Proceedings of the Fifth by F. W. Wendt, H. Liebowitz, N. Perrone

By F. W. Wendt, H. Liebowitz, N. Perrone

Mechanics of Composite fabrics includes the complaints of the 5th Symposium on Naval Structural Mechanics held in Philadelphia, Pennsylvania, on may perhaps 8-10, 1967. The papers discover the mechanics of composite fabrics for naval functions. The structural necessities of a procedure and the elemental mechanical homes of composite fabrics, in addition to the habit of such fabrics lower than a number of environmental stipulations, are mentioned.
This publication is made from forty chapters and starts with an research of missile and plane platforms constraints and operational specifications, in addition to send structures constraints and operational requisites, for composite fabrics. the next chapters concentrate on structural makes use of of composites, really in naval ships, airplane, re-entry automobiles, and area automobile buildings; and the micromechanics, structural mechanics, and failure mechanics of composite fabrics. difficulties within the layout of joints and attachments are thought of, in addition to the steadiness of pre-strained laminated media; environmental elements within the layout of composite fabrics; and the impression of water on glass-reinforced plastics.
This monograph should be an invaluable source for scientists and engineers who're rather considering the mechanics of composite fabrics.

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Thick random chopped, glass fiber reinforced, polyester bonded to a grid core of small I-shaped F I G . 4. Wall of Apollo Assembly building faced with sandwich panels of reinforced plastics bonded to aluminum grid core. Outer facing is covered with thin transparent film of polyvinyl fluoride for increased weather resistance. (Filon) 56 ALBERT G. H. D1ETZ aluminum alloy ribs (Fig. 4). For increased weather resistance the outer facing is covered with a film of poly vinyl fluoride laminated to the reinforced plastic.

There seems to be a weak additional correlation with yield strain. If the l/6th power of yield strain were incorporated in the measure of ocy, the correlation would be within 1%. If a non-sturdy panel is used as a basis for correlation (by non-sturdy is meant one having large values of bit for the plate elements), the results are as shown in Tables 2 and 3. For the non-sturdy panels the correlation with yield strain is stronger than for the sturdy panels, and the incorporation of a 1/2 power of the yield strain as a factor would effect a correlation within 9%.

The figure shows that, with the total volume fraction of boron reinforcement constant, the compressive strength should increase rapidly as the glass content is increased from zero to about 18%, because of the enhanced strength and stiffness of the binder. Test results for three-component composites are indicated by the points on the figure, and while there are low points (attributable to resin-free areas in the specimens, caused by the learning process for manufacturing the three-component system) the better specimens do show increases in strength.

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