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TOOLED THICK COMPOSITES by ARVEN H. SAUNDERS III ...

TOOLED THICK COMPOSITES by ARVEN H. SAUNDERS III ...

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Resin Pressure (Pa)<br />

1.2E+06<br />

1.0E+06<br />

8.0E+05<br />

6.0E+05<br />

4.0E+05<br />

2.0E+05<br />

0.0E+00<br />

1 3 5 7 9 11 13 15 17 19 21 23 25<br />

Position along Flexbeam Length<br />

Figure 4.15. Resin Pressure Distribution 5 Minutes After Time of Full Contact.<br />

The model also was developed to indicate where patterns of high magnitude of resin<br />

velocity and direction are likely to collide, with a pink color indicating a high value, the blue a<br />

lower but still significant value. Since the pressure distribution for a contact area is parabolic,<br />

the maximum pressure is found in the center, with values tapering off to nearly zero at the<br />

edges. When the two major contact areas (accompanied <strong>by</strong> the twin peaks of resin pressure)<br />

collide, the sum of any adjacent CVs will increase, especially at the forefront of the two flows<br />

being joined together. The model measures this value, and compares it to the average resin<br />

flow velocity for all CVs within the laminate. Blue indicates regions that greater than or equal to<br />

twice the average; pink indicates three times the average. The model output included this<br />

pattern, where the pink column of resin flow velocity figures indicate a high magnitude of resin<br />

pressure collisions are occurring (Figure 4.16).<br />

66

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