Component including structures for determinant loading

Patent metadata

Field	Value
Publication number	US-9631916-B2
Application number	US-201314141953-A
Country	US
Kind code	B2
Filing date	Dec 27, 2013
Priority date	Mar 13, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

An apparatus including a first component having an exterior surface formed of a ceramic material and including a primary surface region and a plurality of secondary surface regions protruding from the primary surface region, and a second component positioned in contact with at least one of the secondary surface regions and spaced from the primary surface region to define a determinant load path between the first and second components. A method of forming the apparatus is also provided.

First claim

What is claimed is:

1. An apparatus comprising:
a first ceramic matrix composite component comprising a plurality of stacked plies and having an exterior surface including a primary surface region and a plurality of secondary surface regions, each of the plurality of secondary surface regions being spaced apart from each other by a portion of the primary surface region and protruding from a first side of the primary surface region wherein the primary surface region and the plurality of second surface regions are formed by an outermost ply of the plurality of stacked plies; and
a second component positioned in contact with at least one of the secondary surface regions and spaced from the primary surface region to thereby define at least one determinant load path between the first ceramic matrix composite component and the second component.

2. The apparatus of claim 1 wherein the exterior surface of the first ceramic matrix composite component has a surface roughness profile, and wherein a width of each of the secondary surface regions is greater than a mean peak spacing of the surface roughness profile.

3. The apparatus of claim 1 wherein the exterior surface of the first ceramic matrix composite component has a surface roughness profile; and
wherein a distance between adjacent ones of the secondary surface regions is greater than the mean peak spacing of the surface roughness profile.

4. The apparatus of claim 1 , wherein the first ceramic matrix composite component further comprises
a ceramic matrix material surrounding the plurality of stacked plies.

5. The apparatus of claim 4 , wherein the plurality of secondary surface regions comprise tool bumps formed along the exterior surface of the first ceramic matrix composite component.

6. The apparatus of claim 4 , further comprising at least one insert interposed between an adjacent pair of the plurality of stacked plies at a location corresponding to at least one of the secondary surface regions.

7. The apparatus of claim 6 , wherein a shape of the at least one insert corresponds to a shape of the at least one of the plurality of secondary surface regions.

8. The apparatus of claim 6 , wherein the first ceramic matrix composite component comprises a plurality of the inserts.

9. The apparatus of claim 8 , wherein at least two of the plurality of inserts are separated from each other by at least one of the plurality of stacked plies.

10. The apparatus of claim 8 , wherein the plurality of inserts comprises:
a first of the inserts interposed between a first adjacent pair of the plurality of stacked plies at a location corresponding to the at least one of the plurality of secondary surface regions; and
a second of the inserts interposed between a second adjacent pair of the stacked plies at a location corresponding to the at least one of the plurality of secondary surface regions.

11. The apparatus of claim 6 , wherein the at least one insert includes a reinforcement material that is the same as a reinforcement material of at least one of the plurality of stacked plies.

12. The apparatus of claim 6 , wherein the at least one insert includes a reinforcement material that is different from a reinforcement material of at least one of the plurality of stacked plies.

13. The apparatus of claim 6 , wherein the at least one insert includes a ply of reinforcement material.

14. The apparatus of claim 6 , wherein the at least one insert includes chopped fibers.

15. The apparatus of claim 1 , wherein the second component is metallic.

16. The apparatus of claim 1 , wherein a coefficient of thermal expansion of the first ceramic matrix composite component is different from a coefficient of thermal expansion of the second component.

17. The apparatus of claim 1 , wherein at least a portion of the exterior surface of the first ceramic matrix composite component has at least one form selected from the group consisting of: a planar form and a curved form.

18. The apparatus of claim 17 , wherein at least the portion of the exterior surface of the first ceramic matrix composite component is concave; and
wherein an exterior surface of the second component facing the concave portion of the first ceramic matrix composite component is convex.

19. An apparatus comprising:
a first ceramic matrix composite component comprising a plurality of stacked plies and having an exterior surface, the first ceramic matrix component component including:
a main body portion forming a primary surface region of the exterior surface; and
a plurality of load bearing portions protruding from a first side of the primary surface region and forming a plurality of secondary surface regions, wherein each of the plurality of secondary surface regions are spaced apart from each other by a portion of the primary surface region and wherein the primary surface region and the plurality of second surface regions are defined by an outermost ply of the plurality of stacked plies; and

a second component positioned in contact with at least one of the plurality of secondary surface regions and being spaced from the primary surface region to thereby define at least one determinant load path between the first ceramic matrix composite component and the second component.

20. The apparatus of claim 19 , wherein the first ceramic matrix composite component comprises
a ceramic matrix material surrounding the plurality of plies.

21. The apparatus of claim 20 ,
wherein the first ceramic matrix composite component further comprises at least one insert interposed between an adjacent pair of the plurality of stacked plies at a location corresponding to at least one of the plurality of secondary surface regions.

22. The apparatus of claim 21 , wherein the at least one insert comprises a plurality of inserts including:
a first of the inserts interposed between a first adjacent pair of the plurality of stacked plies at a location corresponding to the at least one of the plurality of secondary surface regions; and
a second of the inserts interposed between a second adjacent pair of the plurality of stacked plies at a location corresponding to the at least one of the plurality of secondary surface regions.

23. A method comprising:
interpreting a model of an apparatus including a model of a first ceramic matrix composite component and a model of a second component structured to contact the first ceramic matrix composite component;
based on the interpreting, determining a location for a determinant load path between the model of the first ceramic matrix composite component and the model of the second component; and
fabricating a first ceramic matrix composite component corresponding to the model of the first ceramic matrix composite component and fabricating a second component corresponding to the model of the second component, the fabricated first ceramic matrix composite component comprising a plurality of stacked plies and including:
an exterior surface
a main body portion forming a primary surface region of the exterior surface; and
a load bearing portion forming a plurality of secondary surface regions spaced apart from each other by a portion of the primary surface region, the secondary surface regions protruding from a first side of the primary surface region wherein the primary surface region and the secondary surface region are defined by an outermost ply of the plurality of stacked plies; and

engaging the fabricated second component with the secondary

Assignees

• Rolls Royce Corp
• Rolls Royce Corp

Inventors

• Thomas David John
• Uskert Richard Christopher

Classifications

• C04B2235/963

  Surface properties, e.g. surface roughness · CPC title

• F01D5/282

  Selecting composite materials, e.g. blades with reinforcing filaments · CPC title

• F05D2300/702

  Reinforcement · CPC title

• C04B2237/84

  Joining of a first substrate with a second substrate at least partially inside the first substrate, where the bonding area is at the inside of the first substrate, e.g. one tube inside another tube · CPC title

• C04B2237/365

  Silicon carbide · CPC title