AD-A276713 Honeycomb Sandwich Structures-Vented Versus Unvented Design for Space Systems
- Version
- 131 Downloads
- 772.90 KB File Size
- 1 File Count
- May 11, 2020 Create Date
- May 11, 2020 Last Updated
Several space systems programs have experienced significant anomalies associated with failures of unvented honeycomb sandwich structures. Based on documentation and personal experience, this report provides descriptions of the structures involved, the circumstances of the failures, and corrective actions. Of special note, it is concluded that failures occur due to internal pressure when the external environment is reduced in ambient pressure. Such failures are initiated at weak bond areas (presumed to result from a manufacturing "defect" - areas that were riot previously identified/repaired. Once initiated, separation of the skin-to-core bond propagates very rapidly and has been described as "explosive,". It is recommended that honeycomb structures for space systems be adequately vented whenever possible. In situations where venting is not feasible, a series of recommendations is presented to minimize the likelihood of failure. Design and manufacturing parameters are listed for honeycomb sandwich panels that are not fully vented, in order to reduce the likelihood of failure.
| File | Action |
|---|---|
| AD-A276713 Honeycomb Sandwich Structures-Vented Versus Unvented Design for Space Systems.pdf | Download |
Comment On This Post