Experimental and Numerical Investigations on Feasibility and Validity of Prismatic Rock Specimen in SHPBReport as inadecuate




Experimental and Numerical Investigations on Feasibility and Validity of Prismatic Rock Specimen in SHPB - Download this document for free, or read online. Document in PDF available to download.

Corrigendum A corrigendum for this article has been published. To view the corrigendum, please click here.

Shock and Vibration - Volume 2016 2016, Article ID 7198980, 13 pages -

Research Article

School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong

Received 24 February 2016; Accepted 18 April 2016

Academic Editor: Yuri S. Karinski

Copyright © 2016 Xibing Li et al. 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.

Abstract

The paper presents experimental and numerical studies on the feasibility and validity of using prismatic rock specimens in split Hopkinson pressure bar SHPB test. Firstly, the experimental tests are conducted to evaluate the stress and strain uniformity in the prismatic specimens during impact loading. The stress analysis at the ends of the specimen shows that stress equilibrium can be achieved after about three wave reflections in the specimen, and the balance can be well maintained for a certain time after peak stress. The strain analysis reveals that the prismatic specimen deforms uniformly during the dynamic loading period. Secondly, numerical simulation is performed to further verify the stress and strain uniformity in the prismatic specimen in SHPB test. It indicates that the stress equilibrium can be achieved in prismatic specimen despite a certain degree of stress concentration at the corners. The comparative experiments demonstrate that the change of specimen shape has no significant effect on dynamic responses and failure patterns of the specimen. Finally, a dynamic crack propagation test is presented to show the application of the present work in studying fracturing mechanisms under dynamic loading.





Author: Xibing Li, Tao Zhou, Diyuan Li, and Zewei Wang

Source: https://www.hindawi.com/



DOWNLOAD PDF




Related documents