Systems and methods for rapid force-based measurements of residual stress
View Patent ↗Systems and methods that directly measures forces caused by residual stresses in components. The components may be manufactured components including via Additive Manufacturing (AM). The system and method may use a small force sensor fitted onto a part of the component and a force sensor may be placed/fitted near a region of expected residual stress of the component. The tension device may be tensioned to apply a small preload onto the component while a relaxation technique is applied to regions of the component while measuring the load on the force sensor. Regions may be individually and sequentially relaxed by slitting the regions via wire electrical discharge machining (EDM) while measuring the load on the force sensor to directly measure force caused by residual stress within the component.
1 . A method of determining residual stress in a region of a component, including:
applying a preload on the component;
applying a relaxation technique to the region; and
measuring a load on the component while applying the relaxation technique to the region;
wherein measuring the load on the component while applying the relaxation technique to the region includes: employing a force sensor in a section of the component where the load on the region of the component is measured; and measuring via the force sensor the load on the component while applying the relaxation technique to the region.
2 . The method of determining residual stress of claim 1 , wherein applying a preload on the component includes employing a tension device to apply a preload on the component.
3 . The method of determining residual stress of claim 2 , wherein measuring the load on the component while applying the relaxation technique to the region includes: employing the force sensor together with the tension device in a section of the component where the load on the region of the component is measured; and measuring via the force sensor the load on the component while applying the relaxation technique to the region.
4 . The method of determining residual stress of claim 3 , wherein the component is manufactured via additive manufacturing to include the section that is sized to receive the force sensor and the tension device, enable the force sensor to measure the load on the region of the component, and enable the tension device to place the load on the component.
5 . The method of determining residual stress of claim 1 , wherein the component is a structural component.
6 . The method of determining residual stress of claim 1 , wherein the component is manufactured.
7 . The method of determining residual stress of claim 1 , wherein the component is manufactured via additive manufacturing.
8 . The method of determining residual stress of claim 1 , wherein the component is manufactured via additive manufacturing to include the section that is sized to receive the force sensor and enable the force sensor to measure the load on the region of the component.
9 . The method of determining residual stress of claim 1 , wherein applying the relaxation technique to the region includes slitting the region via wire electrical discharge machining.
10 . A method of determining residual stress in a plurality of regions of a component, including:
applying a preload on the component;
sequentially applying a relaxation technique to the plurality of regions; and
measuring a load on the component while sequentially applying a relaxation technique to the plurality of regions;
wherein measuring the load on the component while sequentially applying a relaxation technique to the plurality of regions includes: employing a force sensor in a section of the component where the load on the plurality of regions of the component is measured; and measuring via the force sensor the load on the component while sequentially applying the relaxation technique to the plurality of regions.
11 . The method of determining residual stress of claim 10 , wherein applying a preload on the component includes employing a tension device to apply a preload on the component.
12 . The method of determining residual stress of claim 11 , wherein measuring the load on the component while sequentially applying the relaxation technique to the plurality of regions includes: employing the force sensor together with the tension device in a section of the component where the load on the plurality of regions of the component is measured; and measuring via the force sensor the load on the component while sequentially applying the relaxation technique to the plurality of regions.
13 . The method of determining residual stress of claim 12 , wherein the component is manufactured via additive manufacturing to include the section that is sized to receive the force sensor and the tension device, enable the force sensor to measure the load on the plurality of regions of the component, and enable the tension device to place the load on the component.
14 . The method of determining residual stress of claim 10 , wherein the component is a structural component.
15 . The method of determining residual stress of claim 10 , wherein the component is manufactured.
16 . The method of determining residual stress of claim 10 , wherein the component is manufactured via additive manufacturing.
17 . The method of determining residual stress of claim 10 , wherein the component is manufactured via additive manufacturing to include the section that is sized to receive the force sensor and enable the force sensor to measure the load on the plurality of regions of the component.
18 . The method of determining residual stress of claim 10 , wherein sequentially applying the relaxation technique to the plurality of regions includes sequentially slitting the plurality of regions via wire electrical discharge machining.