Experimental and numerical study of the interaction between dynamically loaded cracks and pre-existing flaws in edge impacted PMMA specimens

Habeeb, Chuzhali Nilath Irfan; Osovski, S.

doi:10.1016/j.ijimpeng.2021.103973

Cited by 6 publications

(1 citation statement)

References 52 publications

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“…In separate dynamic loading studies, some scholars analyzed the mechanical properties and crack extension inclination of crack-containing specimens using the SHPB system [23][24][25][26]. In addition, there has also been some research about the cracking state and dynamic toughness of rocks under dynamic loading, and these studies proposed development guidelines for tip, closed, and secondary cracks [27,28].…”

Section: Introductionmentioning

confidence: 99%

Damage Behavior Study of Specimens with Double-Prefabricated Cracks under Dynamic–Static Coupling Loads

Guo,

Xiong,

et al. 2023

Buildings

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The surrounding rock of the deep-buried chamber contains high-ground stress and initial cracks. Under a dynamic load, cracks will develop and expand, leading to the fracture and collapse of the confining pressure. Therefore, it is essential to study the failure process of fissured surrounding rock under the joint action of static stress and a dynamic load. In this paper, samples with cracks are used to simulate the defective rock mass. Similar modeling tests and numerical simulation studies were carried out to reveal the damage process of cracked deep rock mass under dynamic disturbance and investigate the impact threshold of rock mass damage under a certain level of hydrostatic pressure. The model test investigated the damage behavior for specimens with double-prefabrication cracks under pressure from a dynamic–static coupling load. The influence of the mechanisms of the angle of a crack, the initial static pressure, and impact capacity on specimen damage was analyzed. It was perceived that, with an increase in the angle of the crack, the omen of specimen damage is less obvious, and the specimen is subjected to sudden damage. On this basis, the damage process of the specimen containing prefabricated cracks under combined dynamic and static loads is realized through numerical simulation, and tests verify the accuracy of the results. The analysis allowed us to come up with a variation rule for the single-disturbance energy threshold for specimens with a prefabricated crack angle and the initial static load level of the specimen containing double-prefabrication cracks. The study lays the foundation for the future analysis of any deep rock mass failure process under dynamic disturbance and the protection of a deeply buried chamber.

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