Displacement, Strain and Failure Estimation for Multi-Material Structure Using the Displacement-Strain Transformation...

Area of Science:

• Structural Engineering
• Materials Science
• Mechanical Engineering

Background:

• Accurate estimation of structural deformation and failure is critical for ensuring safety and performance.
• Current methods for monitoring structural health are limited by sensor placement and material properties.

Purpose of the Study:

• To develop and validate displacement-strain transformation matrices (SDT and DST) for estimating structural deformation and failure.
• To assess the applicability of these methods to diverse structures, including multi-material components.

Main Methods:

• Development of strain-to-displacement (SDT) and displacement-to-strain (DST) transformation matrices.
• Application and validation of SDT and DST methods on 1D beams, 2D plates, rotating structures, and real wind turbine blades.
• Investigation of multi-material structures, specifically alumina-aluminum bonded structures.

Main Results:

• Successful estimation of structural deformation using the SDT method across various test cases.
• Demonstrated potential for DST method in predicting structural failures where sensors are not applicable.
• Identified challenges in estimating displacement for brittle materials like alumina.
• Presented successful displacement and failure estimation for alumina-aluminum bonded structures.

Conclusions:

• The proposed SDT and DST methods offer a promising approach for comprehensive structural health monitoring.
• The methods are adaptable to complex structures, including multi-material designs, with potential for predicting failure.
• Further research is needed to address limitations with brittle materials.