循环冲击荷载下的礁灰岩力学特性研究

doi:岩石力学；礁灰岩；陆源性岩石；力学性能；冲击荷载；应力–应变曲线

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Abstract To study the failure mode of reef limestone under impact load，static mechanical tests are performed on two types of reef limestone and several terrigenous rock. And the stress-strain change laws of the rock samples under different impact pressures were analyzed using the split Hopkinson pressure bar system(SHPB). And explore the dynamic mechanical properties of reef limestone under three cycle impact loads with LS-DYNA numerical simulation software. The results show that the static mechanical properties of reef limestone are close to those of gypsum，far less than those of terrigenous rocks. And the reef limestone has a certain residual strength after failure. However，under dynamic impact load，the reef limestone has an obvious compaction stage. And its dynamic compressive strength will increase significantly with the increase of strain rate. In addition，when the cyclic impact load is small，the stress-strain curve of reef limestone sample is closed or open type under the first and second impacts，but it becomes open type under the third impact. When the impact load increases to a certain value，the stress-strain curve of reef limestone sample under different cyclic impact times is open type.

Key words： rock mechanics reef limestone terrigenous rocks mechanical properties impact load stress-strain curve

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	Articles by authors
	SONG Kaiwen1
	HUANG Junhong2
	3
	LUO Yi1
	3
	WEI Xiaoqing1
	3
	ZHENG Shilong1
	LI Xinping1
	3
	LIU Tingting1
	3

Cite this article:

SONG Kaiwen1,HUANG Junhong2,3, et al. Mechanical properties of reef limestone under cyclic impact loading[J]. , 2023, 42(S2): 3956-3965.

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https://rockmech.whrsm.ac.cn/EN/岩石力学；礁灰岩；陆源性岩石；力学性能；冲击荷载；应力–应变曲线 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/3956

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