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Sandwich structure having arrestment feature and method of making the same

A sandwich structure and component technology, applied in the direction of manufacturing tools, layered products, transportation and packaging, etc., can solve the problems of inconsistent propagation, expensive manufacturing and assembly of substructures, increased weight of sandwich structures, etc., to improve fracture and structural toughness, Improved strength, the effect of improved strength

Active Publication Date: 2012-08-15
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One solution to this problem is to include substructures within the sandwich in order to limit the propagation of inconsistencies, however substructures are relatively expensive to manufacture and assemble and add additional weight to the sandwich
Furthermore, known substructural solutions are specifically designed to limit the propagation of either separation or cracks, but not both
It is possible to combine multiple substructure designs in order to prevent both separation and crack propagation, although using multiple substructures would cause the overall composite structure design to exceed the target weight specification

Method used

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  • Sandwich structure having arrestment feature and method of making the same
  • Sandwich structure having arrestment feature and method of making the same
  • Sandwich structure having arrestment feature and method of making the same

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Embodiment Construction

[0061] first reference figure 1 with figure 2 , the disclosed embodiments relate to a composite sandwich structure 20 comprising a segmented core 22 sandwiched between first and second face sheets 24, 26 and secured thereto. Core 22 includes a plurality of core segments 28 that are spliced ​​together along a common edge 37 thereof to form joint 30 . In the example shown, the joints 30 extend substantially orthogonally, although other geometries are possible. Also, while sandwich structure 20 is shown as being substantially flat, it may include curvature and various contours (not shown) to suit a particular application.

[0062] The sandwich structure 20 includes, along the joint 30 , a blocking member 25 disposed between two adjacent segments of the core segment 28 and disposed between the face sheets 24 , 26 . As described in more detail below, the blocking member 25 may be used to block the propagation of one or more local inconsistencies (not shown) in the sandwich stru...

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Abstract

A composite sandwich structure comprises a core sandwiched between composite laminate facesheets. The core includes a plurality of core sections spliced together at joints that incorporate integral features for arresting the propagation of irregularities in the facesheets.

Description

technical field [0001] The present disclosure relates generally to composite structures, and more particularly to composite sandwich structures having segmented cores and integral arrestment features. Background technique [0002] One type of composite structure used in various applications includes a core sandwiched between a pair of composite panels, sometimes referred to as a sandwich structure. When the core includes multiple core sections / elements (eg, multi-core segments joined together), the structure may be referred to as a "core cladding / core block". The cores in these structures may be formed from any of a variety of materials including, but not limited to, honeycomb, foam, and balsa materials, just to name a few. The panels may be formed from a plurality of laminated plies of fiber reinforced resin. [0003] Sometimes there are inconsistencies within localized areas of the panels of these sandwich structures. For example, the panels may contain voids, pits or p...

Claims

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Application Information

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IPC IPC(8): B32B3/06B32B3/12
CPCB32B3/06B32B3/12Y10T428/24174Y10T156/1093Y10T29/49622Y10T428/24777Y10T29/49982Y10T428/249923Y10T428/239Y10T428/24752Y10T156/10Y10T156/1002Y10T156/1034B23B3/04B29C65/00B29C66/01B29C66/05B29C66/10B29C66/11B32B3/04B32B3/14B32B3/18B29C66/1122B29C66/114B29C66/118B29C66/112B29C66/122B29C66/1182B29C66/128B29C66/1142B32B2250/03B32B2307/718B32B2605/18
Inventor C·R·沙法J·H·福格蒂H·顾T·D·理查森K·M·雷斯
Owner THE BOEING CO
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