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Proceedings 2018, 2(8), 509; https://doi.org/10.3390/ICEM18-05409

Dynamic Fracture Process and Strain Rate Effect of a Porous SiC Ceramic

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and
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1
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
2
Shaanxi Key Laboratory of Impact Dynamics and Engineering Application (IDEA), Xi’an 710072, China
3
Shaanxi Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, Xi’an 710072, China
Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.
*
Author to whom correspondence should be addressed.
Published: 29 June 2018
PDF [626 KB, uploaded 13 July 2018]

Abstract

In this paper, dynamic fracture process and strain rate effect of a porous SiC ceramic were investigated. The failure process under dynamic loading conditions was monitored by a high-speed camera. Digital image correlation (DIC) method was further utilized to calculate the surface strain field. The high-speed images show that crack initiates in the center of the specimen and then propagates to the entire specimen under dynamic loading. In addition, DIC result showed that cracks occur on the surface of the specimen formed a band. And the band finally caused the collapse of the specimen. The test results showed that compressive strength of the porous SiC ceramic is rate sensitive. Under quasi-static conditions, the compressive strength is about 120 MPa, while in dynamic conditions strength increased to 247 MPa. Energy absorption during the deformation process is much larger under dynamic loading.
Keywords: porous SiC ceramic; strain rate effect; DIC porous SiC ceramic; strain rate effect; DIC
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, Y.; Zhou, D.; Liu, H.; Zakir, S.M.; Li, Y. Dynamic Fracture Process and Strain Rate Effect of a Porous SiC Ceramic. Proceedings 2018, 2, 509.

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