Optical deformation measurement for thin-walled honeycomb structure with contacting cell walls under loading based on...

Area of Science:

• Materials Science
• Mechanical Engineering
• Optics

Background:

• Thin-walled honeycomb structures offer high specific strength and energy absorption.
• Quantifying their mechanical behavior under large deformation is challenging due to complex geometry.

Purpose of the Study:

• To propose an optical-based deformation measurement strategy for thin-walled honeycomb structures.
• To enable quantitative analysis of mechanical multiscale behavior under loading.

Main Methods:

• Utilizing color image processing and branch point establishment for deformation measurement.
• Employing compression simulation and experimental validation.
• Separating contacted cell walls and estimating branch points from end points.

Main Results:

• The proposed strategy accurately measures honeycomb structure deformation during the densification stage.
• Calculations of cell wall deformation and pore variation tendency are achieved.
• The method demonstrates acceptable precision for analyzing complex structures.

Conclusions:

• The developed optical strategy effectively measures deformation in thin-walled honeycomb structures.
• It provides a method for analyzing cell wall behavior and pore changes.
• Identified limitations offer direction for future research in this field.