US 11,740,206 B2
Angle-beam guided waves for composite-damage identification and monitoring
Victor Giurgiutiu, Columbia, SC (US); Robin James, Columbia, SC (US); Hanfei Mei, Columbia, SC (US); and Mohammad Faisal Haider, East Palo Alto, CA (US)
Assigned to University of South Carolina, Columbia, SC (US)
Filed by University of South Carolina, Columbia, SC (US)
Filed on Sep. 18, 2020, as Appl. No. 17/24,906.
Claims priority of provisional application 62/936,758, filed on Nov. 18, 2019.
Prior Publication US 2021/0148861 A1, May 20, 2021
Int. Cl. G01N 29/04 (2006.01); G01N 29/07 (2006.01)
CPC G01N 29/041 (2013.01) [G01N 29/075 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for detecting various types of damage in composites comprising:
employing at least one adjustable angle beam transducer to achieve single-mode guided wave excitation by generating a shear horizontal (SH0) wave excited into at least one quasi-isotropic composite via intrinsic shear coupling present in the at least one quasi-isotropic composite;
observing wave propagation and interaction within a test subject;
and detecting damage in the test subject; and
employing at least two different modes of wave propagation to detect and identify different types of damage, wherein the method can separate detection of delamination from impact damage other than delamination including matrix cracking and fiber breakage to the test subject.