1096. Isogrid Structural Applications
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Paper
Abstract
This paper examines several isogrid shell and panel applications and considers their weight performance characteristics. An extended local instability analysis is used to develop strength-weight data on edge-loaded isogrid panels on shell sections. This data is interpreted in terms of structural efficiency and effective load carrying skin for both flanged and unflanged isogrid. The analysis includes initial structural distortion as one of its input parameters. The following applications are described and typically evaluated in terms of isogrid weight, cross-sectional properties, node-to-node spacing, stiffness, and strength. Tradeoffs to evaluate weigh and performance factors are outlined to identify optimization criteria.
– A compression-stable isogrid bulkhead. This is analytically described, and the features affecting its grid geometry are delineated.
– Fairings and adapters, inclining cylindrical and conical structures for launch vehicles. Isogrid structural characteristics are reviewed and compared with skin-stringer structures.
– Dish or paraboloidal-type antenna reflector. Here, sculptured and stretch-formed isogrid serves as both the reflective and support structure.
– A satellite instrument mounting platform. Stiffness and package mounting versatility feature are considered
– An Isogrid solar panel substrate structure. Dimensional stability, stiffness, and weight are considered.
