RT journal article
T1 Numerical study on damage identification using shearography with different shearing amounts
A1 Araújo dos Santos, J.V.
A1 Lopes, H.
A1 Moreno García, Pablo
A2 Ingeniería Mecánica y Diseño Industrial
K1 Damage identification
K1 Modal curvature
K1 Shearography
K1 Shearing amount
K1 Finite element method
K1 Finite difference method
AB Shearography is a technique appropriate for the analysis of damage, namely by allowing the direct measurement of the gradient or derivative of the displacement field, i.e. the rotation field. This technique is based on the subtraction of the phase of laser light coming from the reflection at two neighboring points in the surface. The distance between these two points define what is called shearing amount. The measurement sensitivity can be adjusted by varying the shearing amount, such that we obtain large sensitivities with high values of this parameter. However, high values of shearing amount lead to the smoothing of the results. In this paper, a study on damage identification in beams using shearography with different shearing amounts is reported. Damage indicators based on differences in modal curvatures are applied to data coming from simulation of shearography. These damage indicators show a great dependency on the shearing amount, such that, for instance, with large values of this parameter the damage is spread across a larger area than the actual one. The peak values of the damage indicators present an attenuation and the damaged area also increases with the shearing amount. According to the findings presented in this paper, it is advisable to take precautions when localizing damage with measurements obtained with shearography.
PB Elsevier
SN 2452-3216
YR 2017
FD 2017
LK http://hdl.handle.net/10498/34167
UL http://hdl.handle.net/10498/34167
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026