DATE:

Friday, October 9, 2020

TIME:

3:30 PM

LOCATION:

Virtual Zoom Conference

SPEAKER:

Dr. Margherita Capriotti, Aerospace Engineering, San Diego State University

ABSTRACT:

Non-Destructive Evaluation (NDE) aims at detecting defects and assessing the health status of materials and structures non-invasively. Among the numerous techniques, Ultrasonic Guided Waves (UGW) are very suitable for the inspection of large thin structures (e.g. composite aerospace panels, arterial vessels) due to their “guided” nature and their complex dispersive behaviour. UGW testing can greatly benefit from the ability to select the most sensitive mode-frequency combination and from quantitative information on the detected damage. In this talk, a hybrid computational model to predict guided wave scattering in complex structures will be described: a Semi-Analytical Finite Element (SAFE) solution for the “global” region is coupled to a full FE approach for the “local” one, to efficiently extract wave scattering spectra. Two case studies (2D and 3D) will be presented, together with their experimental applications and the potential of expanding to a variety of fields.

Bio: Margherita Capriotti received her Ph.D. in Structural Engineering from University of California San Diego in 2019, pursuing research in the Experimental Mechanics & NDE Lab. She previously graduated with her B.S. and M.S. in Mechanical Engineering at the University of Parma (Italy). After Postdoctoral Research at Mayo Clinic in the Department of Radiology, she joined San Diego State University as an Assistant Professor in the Aerospace Engineering Department.

Her research focuses on non-destructive evaluation techniques, investigating thermal and elastic wave propagation for structural assessment, combining computational and experimental research. She works on the development of global-local models for elastic wave scattering and on guided ultrasonic waves and infrared thermography techniques for defect detection and characterization of a variety of materials.

HOST:

Satchi Venkataraman

VIDEO: