Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads

Flaws and discontinuities play a crucial role in the failure process of rocks. To investigate the fracturing mechanism of rock with combined flaws composed of crack and hole, the digital image correlation (DIC) method is used to record and analyze the rock failure behavior. Coupled static and dynami...

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Main Authors:	Diyuan Li, Feihong Gao, Zhenyu Han, Quanqi Zhu
Format:	Article
Language:	English
Published:	Hindawi Limited 2020-01-01
Series:	Shock and Vibration
Online Access:	http://dx.doi.org/10.1155/2020/8866673

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spelling	doaj-5b5721d8e2a9449fb42cf839ace734332020-11-25T03:42:32ZengHindawi LimitedShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88666738866673Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic LoadsDiyuan Li0Feihong Gao1Zhenyu Han2Quanqi Zhu3School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, ChinaFlaws and discontinuities play a crucial role in the failure process of rocks. To investigate the fracturing mechanism of rock with combined flaws composed of crack and hole, the digital image correlation (DIC) method is used to record and analyze the rock failure behavior. Coupled static and dynamic loads are applied on granite specimens with prefabricated flaws by a modified split Hopkinson pressure bar (SHPB) device. The dynamic mechanical properties of the granite specimens are affected by the flaw inclinations with the loading directions. With the inclination angle increasing, the combined strength and peak strain both decrease first and then increase. Full- and local-field strain evolution of the granite specimens is analyzed in a quantitative way by using DIC technique. The specimens with a flaw angle of 45° are broken relatively evenly with homogenous small particle sizes. The variation trend of fragment sizes is consistent with that of combined strength and absorption energy of the specimens.http://dx.doi.org/10.1155/2020/8866673
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Diyuan Li Feihong Gao Zhenyu Han Quanqi Zhu
spellingShingle	Diyuan Li Feihong Gao Zhenyu Han Quanqi Zhu Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads Shock and Vibration
author_facet	Diyuan Li Feihong Gao Zhenyu Han Quanqi Zhu
author_sort	Diyuan Li
title	Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads
title_short	Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads
title_full	Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads
title_fullStr	Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads
title_full_unstemmed	Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads
title_sort	full- and local-field strain evolution and fracture behavior of precracked granite under coupled static and dynamic loads
publisher	Hindawi Limited
series	Shock and Vibration
issn	1070-9622 1875-9203
publishDate	2020-01-01
description	Flaws and discontinuities play a crucial role in the failure process of rocks. To investigate the fracturing mechanism of rock with combined flaws composed of crack and hole, the digital image correlation (DIC) method is used to record and analyze the rock failure behavior. Coupled static and dynamic loads are applied on granite specimens with prefabricated flaws by a modified split Hopkinson pressure bar (SHPB) device. The dynamic mechanical properties of the granite specimens are affected by the flaw inclinations with the loading directions. With the inclination angle increasing, the combined strength and peak strain both decrease first and then increase. Full- and local-field strain evolution of the granite specimens is analyzed in a quantitative way by using DIC technique. The specimens with a flaw angle of 45° are broken relatively evenly with homogenous small particle sizes. The variation trend of fragment sizes is consistent with that of combined strength and absorption energy of the specimens.
url	http://dx.doi.org/10.1155/2020/8866673
work_keys_str_mv	AT diyuanli fullandlocalfieldstrainevolutionandfracturebehaviorofprecrackedgraniteundercoupledstaticanddynamicloads AT feihonggao fullandlocalfieldstrainevolutionandfracturebehaviorofprecrackedgraniteundercoupledstaticanddynamicloads AT zhenyuhan fullandlocalfieldstrainevolutionandfracturebehaviorofprecrackedgraniteundercoupledstaticanddynamicloads AT quanqizhu fullandlocalfieldstrainevolutionandfracturebehaviorofprecrackedgraniteundercoupledstaticanddynamicloads
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Full- and Local-Field Strain Evolution and Fracture Behavior of Precracked Granite under Coupled Static and Dynamic Loads

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