Beamforming and Steering in Plate-Like Anisotropic Structures

Description:

Reference #: 01166

The University of South Carolina is offering licensing opportunities for a phased array technique to rapidly inspect damage in large composite structures. It may be used to assess the quality of composites in product design and manufacturing processes.

Invention Description:

The subject invention describes a phased array technique that allows rapid inspection of large areas of composite material. Compared to the traditional methods, which are designed for isotropic metallic structures, this invention offers a revolutionary approach for rapid damage inspection in composites. It utilizes sensors placed closely together in a compact format, steers the outputs of all sensors in the desired direction, and scans the entire structure (similar to a radar).

Potential Applications:

Non-destructive evaluation, structural health monitoring, damage detection, and failure prevention of critical composite structures in in aviation, aerospace and automotive engineering

Advantages and Benefits:

The technology offers several competitive advantages over current state-of-the-art technology:

  1. It considers the direction dependent properties of anisotropic composites, while the traditional methods use the quasi-isotropic assumption.
  2. It considers the energy skew effect of waves in anisotropic composites, while the traditional methods have not considered that.
  3. It is a generic format that works for both cases: (1) wavenumber and group velocity are aligned and (2) wavenumber and group velocity are not aligned.

Background:

Conventional nondestructive evaluation (NDE) techniques use bulk waves to inspect such structures. However, using bulk waves can require a point-by-point measurement of the inspected area, which can be time-consuming and inefficient. Guided wave-based ultrasonic NDE techniques address such inefficiencies.

Development:

The algorithm used for this technique has been developed and verified with laboratory testing. 

Patent Information:
For Information, Contact:
Technology Commercialization
University of South Carolina
technology@sc.edu
Inventors:
Lingyu Yu
Zhenhua Tian
Keywords:
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