Across
- 3. Canning Wavy deformations in broad flat metal
- 5. Bending mode that has two nodes.
- 9. Sensor that you place on a node to avoid sensing bending mode.
- 10. Ideal placement for rate-gyros.
- 11. When the load acts over a length or area.
- 15. Region where material will not go back from a deformation.
- 16. Interaction of unsteady aerodynamics, structural elasticity, and airframe inertia.
- 19. Percentage of flutter margin demonstrated through flight test.
- 20. Divides skin into sections and carries bending and axial loads from pressurization.
- 21. Increases stress when decreased.
- 23. Aeroelastic instability, usually destructive divergent oscillations.
- 24. “As the extension, so the force” law.
- 25. Comprised of 4 strain gauges placed on areas of high stress and low strain gradients.
- 27. Anisotropic material that is tailorable.
- 28. Stresses above this strength on a material result in cracks or fractures.
- 29. Minimum of three percent for flutter, “g”
- 30. Random oscillation associated with separated airflow.
- 32. Combined airloads and inertia loads including static and dynamic.
- 35. Loads from acceleration of mass.
- 37. Static/ground test gives confidence in this.
- 39. The unique point on a beam where the application of shear does not produce a twist (2).
- 41. Noisy cavity loading.
- 43. Resistance to impact loads.
- 44. Resistance to fatigue (repeated straining).
- 47. Structural members that carries bending and axial loads.
- 48. Structure type that primarily enhances aerodynamics.
- 49. Ratio of lateral strain to axial train.
Down
- 1. Forms the wingbox and carries bending and axial loads.
- 2. Ground ___ Testing focused on structural modes.
- 4. Coupling of dynamic airframe aeroelastic response with flight control system.
- 6. Failure type in a composite laiminate.
- 7. A higher value of this results in a steeper slope in the linear portion of the stress-strain diagram.
- 8. Loads encountered at higher speeds.
- 12. Percentage of static loads the test article can fly to when ground tested to 100%.
- 13. Type of structure that is critical to flight.
- 14. Loads from pressure gradients on the OML.
- 17. Structural element that primarily keeps wing or fuselage shape.
- 18. Loads within the structure.
- 22. An option to correct ASE in addition to sensor placement (not at low frequencies!).
- 25. Structure type that is good in bending but not in torsion.
- 26. Flight test with this for confidence in loads.
- 29. “Strechiness” reduced by strain hardening.
- 31. Structural members that carry circumferential pressurization loads.
- 33. Address cost in this part of the LCC along with ops for biggest impact.
- 34. Load type that is best handled by fibers or plates (biaxial).
- 36. Material that has identical properties in all directions such as glass or metal.
- 38. Structure type that best handles shear/torsion.
- 40. Limit defined by S-N curve.
- 42. A failure in a beam from compression or in a plate/skin from shear.
- 45. Increase (stiffen) this mode to increase flutter speed.
- 46. Structural element that transfers aero loads to the substructure and carries torsion and shear.