IP Library Granted Patent US 10,908,055
Granted Patent B2
US 10,908,055 · App. 16/300,206 · Granted Feb 2, 2021

Evaluation of applications using digital image correlation techniques

Inventor: Joel Thambi (Bergen op Zoom, NL)
Assignee: SHPP Global Technologies B.V.
G01N3/36G01B11/16G01N2203/0005G01N2203/0044G01N2203/0057G01N2203/0073G01N2203/0218G01N2203/0647
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Quick Facts
Patent No.
US 10,908,055
App. No.
16/300,206
Granted
Feb 2, 2021
Kind
B2
Abstract

A method for material lifetime evaluation includes: causing a stress to be applied to a material surface of a component based at least on a cycle of load properties over time; causing an image of the material surface to be captured as a captured image of a complete in-situ field; determining an area of a hysteresis of a stable surface strain region in a stress-strain curve of the material surface to determine a loss energy (first damage parameter) for low cycle fatigue modeling; determining a deformation energy (second damage parameter) for high cycle fatigue monitoring; determining a failure parameter based on at least one of the first damage parameter and the second damage parameter; comparing the failure parameter to a record in a database; and determining a remaining life of the component based on comparison of the failure parameter to the record in the database.

Claims (40)

1. A method for material lifetime evaluation, the method comprising:

causing a stress to be applied to a material surface of a component based at least on a cycle of load properties over time;

causing an image of the material surface to be captured as a captured image of a complete in-situ field, wherein the captured image is correlated to the cycle of load properties, wherein the captured image is correlated with the cycle of load properties using digital image correlation (DIC) and wherein the captured image is correlated to surface strain of the component;

determining an area of a hysteresis of a stable surface strain region in a stress-strain curve of the material surface to determine a loss energy for low cycle fatigue modeling, wherein the loss energy is a first damage parameter;

determining a deformation energy for high cycle fatigue monitoring, wherein the deformation energy is a second damage parameter;

determining a failure parameter based on at least one of the first damage parameter and the second damage parameter;

comparing the failure parameter to a record in a database; and

determining a remaining life of the component based on comparison of the failure parameter to the record in the database.

2. The method of claim 1 , further comprising determining a lifetime parameter associated with the material surface, wherein the remaining life is based at least on the lifetime parameter.

3. The method of claim 1 , wherein causing the stress to be applied to the material surface comprises applying forces to the material surface using a loading apparatus.

4. The method of claim 1 , wherein the cycle of load properties comprises a load by generated by a change in temperature, a change in pressure, a change in mechanical force, a change in displacement, or a combination thereof.

5. The method of claim 1 , wherein the material surface comprises a hotspot region.

6. The method of claim 1 , wherein the captured image is synchronized with the cycle of load properties.

7. The method of claim 1 , wherein causing the stress to be applied to the material surface is implemented using a loading apparatus.

8. The method of claim 1 , wherein causing the image of the material surface to be captured comprises causing a series of images of the material surface to be captured.

9. A system for material evaluation, the system comprising:

a load generator configured to apply a stress to a material surface of a component based at least on a cycle of load properties over time;

a sensor configured to capture an image of the material surface as a captured image of a complete in-situ field, wherein the captured image is correlated to the cycle of load properties using digital image correlation (DIC), wherein the captured image is correlated to surface strain of the component; and

a processor configured to:

determine an area of a hysteresis of a stable surface strain region in a stress-strain curve of the material surface to determine a loss energy for low cycle fatigue modeling, wherein the loss energy is a first damage parameter,

determine a deformation energy for high cycle fatigue monitoring, wherein the deformation energy is a second damage parameter,

determine a failure parameter based on at least one of the first damage parameter and the second damage parameter,

compare the failure parameter to a record in a database, and

determine a remaining life of the component based on comparison of the failure parameter to the record in the database.

10. The system of claim 9 , wherein the processor is further configured to determine a lifetime parameter associated with the material surface, wherein the remaining life is based at least on the lifetime parameter.

11. The system of claim 9 , wherein the load generator applies a stress to the material surface using any loading apparatus.

12. The system of claim 9 , wherein the cycle of load properties comprises a load generated by a change in temperature, a change in pressure, a change in mechanical force, a change in displacement, or a combination thereof.

13. The system of claim 9 , wherein the material surface comprises a hotspot region.

14. The system of claim 9 , wherein the captured image is synchronized with the cycle of load properties.

15. The system of claim 9 , wherein the load generator comprises a loading apparatus.

16. A method for material evaluation, the method comprising:

causing a stress to be applied to a material surface of a component based at least on a cycle of load properties over time;

causing a first image of a first portion of the material surface to be captured as a captured first image, wherein the captured first image is correlated to the cycle of load properties;

causing a second image of a second portion of the material surface to be captured as a captured second image, wherein the captured second image is correlated to the cycle of load properties using digital image correlation (DIC), wherein the first image and the second image are correlated to surface strain of the component, and wherein the first image and the second image comprise at least a portion of a complete in-situ field captured during the method; and

determining an area of a hysteresis of a stable surface strain region in a stress-strain curve of the material surface to determine a loss energy for low cycle fatigue modeling, wherein the loss energy is a first damage parameter;

determining a deformation energy for high cycle fatigue monitoring, wherein the deformation energy is a second damage parameter;

determining a failure parameter based on at least one of the first damage parameter and the second damage parameter;

comparing the failure parameter to a record in a database; and

determining a remaining life of the component based on comparison of the failure parameter to the record in the database.

17. The method of claim 16 , further comprising determining a lifetime parameter associated with the material surface, wherein the remaining life is based at least on the lifetime parameter.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE THE APPLICATION NUMBER 15039474 PREVIOUSLY RECORDED AT REEL: 054528 FRAME: 0467. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Mar 23, 2021
From: SABIC GLOBAL TECHNOLOGIES B.V.
To: SHPP GLOBAL TECHNOLOGIES B.V.
Reel/Frame 057453/0680 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 26, 2020
From: SABIC GLOBAL TECHNOLOGIES B.V.
To: SHPP GLOBAL TECHNOLOGIES B.V.
Reel/Frame 054528/0467 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 12, 2018
From: THAMBI, JOEL
To: SABIC GLOBAL TECHNOLOGIES B.V.
Reel/Frame 047470/0530 →
Continuity (2)
Provisional Application 62336002 · May 13, 2016
Related Publication 20200209126A1 · Jul 2, 2020