We describe the feasibility and the repeatability of highly nonlinear solitary waves (HNSWs) in nondestructive evaluation (NDE) of different materials and structures. HNSWs formed by tapping the first particle of a one-dimensional chain of spherical particles in contact with the material or the structure being assessed. This way, one pulse forms and travel within the chain, and one or more pulses (depending on the mechanical properties of the contact structure) reflect back to the chain at the chain/structure interface. The hypothesis is that the reflected pulses features such as their amplitude or velocity depend on the stiffness of the material or the structure in contact with the chain. The results show that the time-of-flight (TOF) is an appropriate wave feature for NDE applications because it is highly repeatable and influenced by the mechanical properties of contact material/structure. In the future, the proposed NDE method may potentially serve as a cost-effective tool for the rapid evaluation of existing structures.
Amir Nasrollahi and Piervincenzo Rizzo, "Recent developments on the generation and detection of highly nonlinear solitary waves for NDE applications (Conference Presentation)," Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 105991F (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 08, 2018; Published: 3 April 2018); https://doi.org/10.1117/12.2296432.5763077745001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.