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NIA Seminar by Raphael Haftka |
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Date: August 8, 2005
Time: 10:30am
Location: NIA, Rm 137
Effects of Uncertainty Reduction on Structural Design Performance
Raphael T. Haftka, University of Florida, Gainesville
In structural design for safety, increased uncertainty translates to additional weight, so uncertainty reduction should be considered in the design process. The presentation will consider several alternative approaches to reduce uncertainty in predicting structural failure. These include improvements in analytical models, reduction in variability of material properties, tests, and inspections. The tradeoffs between weight, performance, and cost of reducing the uncertainties will be illustrated by aerospace structural design examples. In addition, it will be shown that often one kind of uncertainty can masquerade as another. For example, poor analytical models can manifest themselves as increased variability.
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