Elastic Conditioning, Memory and Relaxation Induced by the Presence of Cracks in Concrete
The presence of damage or cracks modifies the elastic properties of a sample, introducing nonlinear components in the elastic response to an ultrasonic excitation. Among other effects, we discuss here conditioning and memory, i.e. the transition of the sample to a new (non equilibrium) elastic state when perturbed by a strain, even at a relatively low amplitude. A quantification of these phenomena can be the basis for a novel Nondestructive Method to evaluate the integrity of a structural or mechanical component.
M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee
M. Scalerandi et al., "Elastic Conditioning, Memory and Relaxation Induced by the Presence of Cracks in Concrete", Key Engineering Materials, Vols. 417-418, pp. 253-256, 2010