Photogrammetric Process to Monitor Stress Fields Inside Structural Systems

Area of Science:

• Solid mechanics
• Photogrammetry
• Computational mechanics

Background:

• Accurate real-time stress analysis is crucial for structural integrity and safety.
• Traditional methods may have limitations in capturing dynamic stress distributions.
• Non-contact measurement techniques offer potential for improved stress evaluation.

Purpose of the Study:

• To develop and validate a novel methodology for estimating real-time stress distributions in solids and structures.
• To integrate photogrammetric techniques with numerical methods for comprehensive stress analysis.
• To provide a practical approach for monitoring structural health under load.

Main Methods:

• Photogrammetric capture of surface displacement fields from sequential images of deformed solids.
• Application of Poisson's Method to reconstruct 3D surfaces from point clouds using triangular meshes.
• Utilizing the Boundary Element Method (BEM) to calculate stress values based on measured displacements.
• Optimizing boundary displacement data to fit reconstructed surfaces for BEM analysis.

Main Results:

• Demonstrated the effectiveness of photogrammetry in capturing surface deformations.
• Successfully applied BEM with measured displacements to estimate stress distributions.
• Showcased the methodology's capability to handle large datasets from reconstructed surfaces.
• Validated the potential for real-time stress monitoring in various structural applications.

Conclusions:

• The proposed photogrammetry-integrated BEM approach is effective for real-time stress analysis.
• This method offers a powerful tool for structural health monitoring and performance evaluation.
• The technique has significant potential for application in engineering and materials science.