Integral Strain Indicators for Turbine Blade Creep Monitoring
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Solution Overview
Problem
Components in turbomachines, particularly turbine blades, suffer from creep deformation due to high temperatures and stresses, leading to elongation and potential interference with stationary structures, causing vibrations and reduced performance.
Innovation Solution
Integration of fiducial markers on the component surface, formed from a compatible material, to measure strain, creep, and deformation using a three-dimensional data acquisition system, allowing for accurate strain analysis and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fiducial markers are added to the component surface for strain measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The fiducial markers are integrated directly into the component surface during manufacturing, merging the measurement reference features with the component structure itself rather than adding separate measurement devices. This reduces overall system complexity while maintaining high measurement precision through the embedded markers.
Solution Approach 2:
The fiducial markers are prepared and positioned on the component surface before the component undergoes service conditions and deformation. This preliminary placement ensures that the markers serve as stable reference points for subsequent strain measurements, enabling precise detection of deformation without requiring complex real-time adjustment mechanisms.
2Manufacturing precision
If material is deposited on the component surface to form markers, then manufacturing precision is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process utilizes controlled deposition of material to form markers with precise dimensional parameters and positions. By controlling deposition parameters such as material volume, placement location, and layer thickness, high precision markers are created through a standardized manufacturing step that integrates well with existing component fabrication processes.
Data Source
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AI summary
A method (200) of making a component (10) with an integral strain indicator includes forming (210) the component (10) with an internal volume (15) formed from a first material and an outer surface (14) and directly depositing a plurality of fiducial markers (12) on a portion of the outer surface (14). The fiducial markers (12) are formed from a second material that is compatible with the first material and the portion of the outer surface (14) defines an analysis region (18) on the outer surface (14) of the component (10). The analysis region (18) defines a gage length (G), and each fiducial marker (12) of the plurality of fiducial markers (12) has a maximum diameter (MD) of between one-tenth and one-twentieth of the gage length (G).