Finite Element Morphing for IBR Damage Removal Without Node Discontinuities
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Solution Overview
Problem
Existing morphing techniques for finite element models often cause discontinuities due to shifting node locations when removing damage, leading to undesirable outcomes in component inspections.
Innovation Solution
A method involving generating a digital representation of a component, identifying damage regions, applying a displacement field, and executing a morphing process to interpolate node locations, thereby smoothing damaged areas without altering undamaged regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing morphing techniques are used to remove damage from finite element models, then damage removal is achieved, but discontinuities occur due to shifting node locations
Solution Approach 1:
The finite element model is divided into damaged regions and undamaged regions. The morphing process is applied selectively only to the damaged regions, while undamaged regions maintain their original node locations. This segmentation approach prevents discontinuities at region boundaries by avoiding unnecessary node shifts in undamaged areas.
Solution Approach 2:
The morphing process is applied locally only to identified damaged regions rather than globally to the entire model. By concentrating the morphing operation solely where damage exists, the method removes damage effectively while preserving node location continuity in undamaged regions, thus avoiding artificial discontinuities.
2Reliability
If morphing process is applied to remove damage, then damage is virtually removed from the model, but model integrity is compromised due to discontinuities
Solution Approach 1:
The model is segmented into damaged and undamaged regions, with morphing applied only to damaged portions. This ensures that the majority of the model (undamaged regions) maintains its original integrity and node continuity, while still achieving effective damage removal in the affected areas.
Solution Approach 2:
The morphing operation is localized to damaged regions only, preserving the structural integrity and node continuity of undamaged regions. This selective application maintains overall model stability and composition while still achieving the desired damage removal effect where needed.
3Reliability
If traditional morphing techniques are used, then damage removal is achieved, but new morphing techniques would be required to avoid discontinuities, increasing complexity
Solution Approach 1:
The solution segments the morphing process into targeted applications on damaged regions only, using existing morphing techniques in a selective manner. This avoids the need to develop entirely new morphing algorithms while still achieving discontinuity-free results through region-based application.
Solution Approach 2:
By applying existing morphing techniques locally to damaged regions rather than globally, the method achieves effective damage removal without requiring complex new algorithms. The selective local application simplifies the overall process compared to developing new global morphing techniques.
Data Source
AI summary
A component or region of an integrally bladed rotor (IBR) includes damage or a defect within a region on the blade of the rotor. A digital representation of the component is generated using an inspection system. The region is identified within the digital representation of the component. Data regarding the scanned IBR is aligned. The aligned data is used in a morphing process with a finite element model of the component that excludes the identified region. Additional operations are performed to morph the data within the identified region that removes the damage or defect from the finite element model.