JEC COMPOSITES MAGAZINE - Issue #74 - July 2012 - 45

requirements can be discussed, and the resulting changes in the structural substantiation test plan are easier to implement, in order to avoid programme timetable delays.

Conclusions
The basic lesson from this accumulated experience is that exploiting innovative methods to reduce the cost of composites often involves the development of a specific engineering infrastructure. The new infrastructure requirements are characteristically subtle, and are difficult to predict before the detail design phase of actual components. The nature of the innovations is such that the changes are more radical than the usual incremental improvement in procedures as experience is gained. Since innovative materials and manufacturing processes are usually involved, this emphasizes the need for an effective concurrent engineering approach. All of these factors impact on non-recurring costs. The equation of whether they negate the recurring cost advantages of the new techniques is not simple, and depends on the production learning curve and the production volume. We have highlighted technical difficulties encountered with low-cost composite manufacturing methods. Experience shows that the potential weight and cost savings associated with these methods are sufficiently attractive to justify continued investment in innovation by aerospace manufacturers. n
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No74 July 2012

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JEC COMPOSITES MAGAZINE - Issue #74 - July 2012

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #74 - July 2012
