Dynamic properties and damage pattern of A95 ceramic under low-impact velocity

Zhenqi Yang; Baojun Pang; Liwen Wang; Runqiang Chi

doi:10.1117/12.851440

14 April 2010 Dynamic properties and damage pattern of A95 ceramic under low-impact velocity

Zhenqi Yang, Baojun Pang, Liwen Wang, Runqiang Chi

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75222G (2010) https://doi.org/10.1117/12.851440
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

In the present study, a universal split Hopkinson pressure bar (SHPB) device has been employed to investigate the dynamic properties and damage patterns of alumina (A95) ceramic under axial compression under strain rate ranging from 280~400s^-1. Different shapes of loading pulses were generated with variety shaper materials. By changing input pulse shape, the experiment results showed that the damage patterns changes from fragmentation by axial splitting to totally smashed into acerate pieces. Based on the experiment results and other literature data, a Johnson-Holmquist 2 (JH-2) constitute model parameters were determined. The mechanical model and constants were used to provide inside details of A95 ceramic damage models under SHPB test under different input pulse shapes. A direct impact experiment was held to compare with the dynamic numerical results, in order to clarify the A95 ceramic response under low velocity impact and the applicability for JH-2 model.

Citation Download Citation

Zhenqi Yang, Baojun Pang, Liwen Wang, and Runqiang Chi "Dynamic properties and damage pattern of A95 ceramic under low-impact velocity", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75222G (14 April 2010); https://doi.org/10.1117/12.851440

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