A damage localization technique using wave front shapes in composite laminates without knowing the velocity profile.

Area of Science:

• Materials Science
• Mechanical Engineering
• Non-Destructive Testing

Background:

• Composite laminates are susceptible to cracks and damage, necessitating effective detection methods.
• Lamb wave analysis for damage localization in anisotropic composites is challenging due to wave propagation complexities.
• Existing methods often require prior knowledge of acoustic velocity, limiting practical application.

Purpose of the Study:

• To develop a novel damage localization method for composite laminates utilizing wave front shapes.
• To overcome the limitations of anisotropy in Lamb wave-based damage detection.
• To enable efficient and accurate damage localization without requiring prior velocity profile knowledge.

Main Methods:

• Development of a damage localization technique based on wave front shapes.
• Utilizing numerical simulations to validate the proposed method.
• Conducting experimental studies to confirm the method's efficacy.

Main Results:

• The proposed method successfully localizes damage in composite laminates.
• Demonstrated good accuracy in damage detection, even in strongly anisotropic structures.
• Numerical and experimental results confirm the method's viability.

Conclusions:

• The presented wave front shape-based method offers an efficient solution for damage localization in composite laminates.
• The technique effectively addresses challenges posed by material anisotropy.
• This approach holds significant promise for non-destructive testing applications in plate structures.