Apparatus and system for cyclic testing

• US 8,210,050 B2
• Filed: 08/26/2009
• Issued: 07/03/2012
• Est. Priority Date: 12/03/2004
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Myers, Jeffrey Lynn
• Primary Examiner(s): NOORI, MAX H
• Application Number:
  US12/547,656
• Publication Number:
  US 20090314099A1
• Time in Patent Office: 1,042 Days
• Field of Search: 737/60, 73808-827
• US Class Current: 73/808
• CPC Class Codes: G01N 2203/0016 Tensile or compressive
• CPC Class Codes: G01N 2203/0066 Propagation of crack
• CPC Class Codes: G01N 2203/0071 Creep
• CPC Class Codes: G01N 2203/0073 Fatigue
• CPC Class Codes: G01N 2203/0222 Temperature
• CPC Class Codes: G01N 3/36 generated by pneumatic or hydraulic means

Abstract

A system is disclosed for testing components comprising a loading system capable of applying and reducing mechanical loads on a test specimen, the loading system comprising a fluidic mechanical muscle coupled to a lever arm, the fluidic mechanical muscle having a sheath and a bladder disposed within the sheath and a control system that controls the operation of the fluidic mechanical muscle. An apparatus is disclosed comprising a frame, a lever arm associated with the frame, a fluidic mechanical muscle coupled to the lever arm, the fluidic mechanical muscle having a sheath and a bladder disposed within the sheath; and a control system that controls the operation of the fluidic mechanical muscle.

Claims

1. A system for testing components comprising:

a loading system capable of applying and reducing mechanical loads on a test specimen, the loading system comprising a fluidic mechanical muscle coupled to a lever arm, the fluidic mechanical muscle having a sheath and a bladder disposed within the sheath; and

a control system that controls the operation of the fluidic mechanical muscle.

2. A system according to claim 1 wherein the lever arm is coupled to a frame using a bearing.

3. A system according to claim 1 wherein the fluidic mechanical muscle is coupled to the lever arm such that the location of the coupling on the lever arm is adjustable.

4. A system according to claim 1 wherein the fluidic mechanical muscle is coupled to the frame such that the location of the coupling on the frame is adjustable.

5. A system according to claim 1 wherein the loading system comprises a plurality of fluidic mechanical muscles coupled to the lever arm such that loading system is capable of applying a tensile load or a compressive load on the test specimen.

6. A system according to claim 1 wherein the control system controls the operation of the fluidic mechanical muscle such that a displacement of the test specimen during the test is controlled.

7. A system according to claim 1 wherein the control system controls the operation of the fluidic mechanical muscle such that the load applied to the test specimen during the test is controlled.

8. A system according to claim 1 wherein at least one fluidic mechanical muscle is configured to apply a tensile load on the test specimen during a selected portion of a test and at least one fluidic mechanical muscle is configured to apply a compressive load on the test specimen during another selected portion of the test.

9. A system according to claim 1 further comprising an environmental chamber that surrounds the test specimen.

10. A system according to claim 1 wherein the system is capable of applying and reducing the load on the test specimen while a temperature of the test specimen is changed.

11. A system according to claim 1 wherein the system is a closed-loop system wherein the control system comprises a feed back signal corresponding to a displacement of the test specimen during the test.

12. A system according to claim 1 wherein the system is a closed-loop system wherein the control system comprises a feed back signal corresponding to the load applied to the test specimen during the test.

13. A system according to claim 1 wherein the system is a closed-loop system wherein the control system comprises a feed back signal corresponding to a temperature of the test specimen during the test.

14. An apparatus comprising:

a frame;

a lever arm associated with the frame;

a fluidic mechanical muscle coupled to the lever arm, the fluidic mechanical muscle having a sheath and a bladder disposed within the sheath;

a means to measure a load applied to a test specimen during a test; and

,

a control system that controls the operation of the fluidic mechanical muscle.

15. An apparatus according to claim 14 further comprising a plurality of fluidic mechanical muscles configured to apply and reduce the load on the test specimen.

16. An apparatus according to claim 15 further comprising on environmental chamber surrounding the test specimen.

17. An apparatus according to claim 16 further comprising the environmental chamber surrounding the test specimen configured to facilitate the control of a temperature of the test specimen.

18. An apparatus according to claim 17 further comprising a means to measure a displacement of the test specimen during a test.

19. An apparatus according to claim 18 wherein the control system is configured to be capable of controlling a thermo-mechanical cyclic test.