原文传递
Ultrasonic Nondestructive Evaluation of Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) During Large-Scale Load Testing and Rod Push-Out Testing.
| 题名： | Ultrasonic Nondestructive Evaluation of Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) During Large-Scale Load Testing and Rod Push-Out Testing. |
| 作者： | Johnston, P. H.; Juarez, P. D. |
| 关键词： | Nondestructive tests, Aerodynamic configurations, Composite wrapping, Design analysis, Load tests, Structural design, Weight reduction, Pultrusion, Fuselages, Cracks, Damage |
| 摘要： | The Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) is a structural concept developed by the Boeing Company to address the complex structural design aspects associated with a pressurized hybrid wing body (HWB) aircraft configuration. The HWB has long been a focus of NASA's environmentally responsible aviation (ERA) project, following a building block approach to structures development, culminating with the testing of a nearly full-scale multi-bay box (MBB), representing a segment of the pressurized, non-circular fuselage portion of the HWB. PRSEUS is an integral structural concept wherein skins, frames, stringers and tear straps made of variable number of layers of dry warp-knit carbon-fiber stacks are stitched together, then resin-infused and cured in an out-of-autoclave process. The PRSEUS concept has the potential for reducing the weight and cost and increasing the structural efficiency of transport aircraft structures. A key feature of PRSEUS is the damage-arresting nature of the stitches, which enables the use of fail-safe design principles. During the load testing of the MBB, ultrasonic nondestructive evaluation (NDE) was used to monitor several sites of intentional barely-visible impact damage (BVID) as well as to survey the areas surrounding the failure cracks after final loading to catastrophic failure. The damage-arresting ability of PRSEUS was confirmed by the results of NDE. In parallel with the large-scale structural testing of the MBB, mechanical tests were conducted of the PRSEUS rod-to-overwrap bonds, as measured by pushing the rod axially from a short length of stringer. |
| 总页数： | Johnston, P. H.; Juarez, P. D. |
| 报告类型： | 科技报告 |
相关文献
- Compressive Loading and Modeling of Stitched Composite Stiffeners.
- Compressive Testing of Stitched Frame and Stringer Alternate Configurations.
- Fabrication of Lower Section and Upper Forward Bulkhead Panels of the Multi-Bay Box and Panel Preparation.
- Testing of a Stitched Composite Large-Scale Multi-Bay Pressure Box.
- Behavior of a Stitched Composite Large-Scale Multi-Bay Pressure Box.
- Tension and Bending Testing of an Integral T-Cap for Stitched Composite Airframe Joints.
检索历史
应用推荐
