Monitoring the fracture behavior in ceramic matrix composites by infrared thermography and acoustic emission

Konstantinos G. Dassios; Evangelos Z. Kordatos; Dimitris G. Aggelis; Dimitris A. Exarchos; Theodore E. Matikas

doi:10.1117/12.2044930

10 April 2014 Monitoring the fracture behavior in ceramic matrix composites by infrared thermography and acoustic emission

Konstantinos G. Dassios, Evangelos Z. Kordatos, Dimitris G. Aggelis, Dimitris A. Exarchos, Theodore E. Matikas

Author Affiliations +

Proceedings Volume 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014; 90630D (2014) https://doi.org/10.1117/12.2044930
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

In this work an innovative methodology was employed for monitoring the fracture behavior in silicon carbide fiberreinforced ceramic matrix composites. This new methodology was based on the combined use of IR thermography and acoustic emission. Compact tension SiC/BMAS specimens were tested with unloading/reloading loops and the thermal dissipation due to crack propagation and other damage mechanisms was monitored by IR thermography. The accuracy of this technique was benchmarked by optical measurements of crack length. In addition, using acoustic emission descriptors, such as activity during the unloading part of the cycles, provided the critical level of damage accumulation in the material. Acoustic emission allowed to closely follow the actual crack growth monitored by IR thermography, enabling quantitative measurements.

Citation Download Citation

Konstantinos G. Dassios, Evangelos Z. Kordatos, Dimitris G. Aggelis, Dimitris A. Exarchos, and Theodore E. Matikas "Monitoring the fracture behavior in ceramic matrix composites by infrared thermography and acoustic emission", Proc. SPIE 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014, 90630D (10 April 2014); https://doi.org/10.1117/12.2044930

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