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Mechanics of Advanced Materials and Structures Volume 31, 2024 - Issue 2
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Original Articles

Effects of a circular hole on the propagation behavior of double running cracks under impact loading

Zhongwen YueSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
,
Yulong LiSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaCorrespondence[email protected]
View further author information
,
Xu WangSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
,
Shuaiming WangSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
,
Haoran DongSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
,
Wei LiSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
,
Jun ZhouSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
&
Anjia PengSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, ChinaView further author information
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Pages 378-386 | Received 09 May 2022, Accepted 12 Aug 2022, Published online: 24 Aug 2022
 
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Abstract

In order to study effects of a circular hole on the propagation behavior of double running cracks under impact loading, the three-point-bending impact experiments of polymethyl methacrylate (PMMA) specimens with a circular hole were carried out by using the optical caustics method, and the numerical simulation was carried out by using the extended finite element method (XFEM) in ABAQUS software. The results show that under the influence of the stress field around the circular hole, the propagation trajectory of double running cracks can be divided into three stages: "exclusion" stage; first "attraction" and then "exclusion" stage; neither "attraction" nor "exclusion" stage. The circular hole defect affects the propagation velocity of double running cracks and the dynamic stress intensity factors KId at the crack tip. The maximum principal stress between the running cracks and the circular hole decreases with crack spacing a. When the double running cracks’ tips are on both sides of the circular hole, the maximum principal stress between the running cracks and the circular hole reaches the minimum.

Disclosure statement

None.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant numbers 51974318, 52174094].

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