{"title":"Low-velocity binary projectile impact cratering in loose granular media","authors":"Yuxuan Luo, Xuegang Huang, Chun Yin, Jian Jin, Wenxue Li, Xiao Peng","doi":"10.1007/s10035-025-01556-1","DOIUrl":null,"url":null,"abstract":"<div><p>Asteroid impacts are a significant area of study in astronomy; however, the specific impact properties of binary systems at close distances have not been extensively explored. This study employs a dual approach, combining low-velocity impact experiments with numerical simulations, to investigate the dynamic characteristics of binary projectiles at varying separation distances. Special focus is placed on how the initial separation distance affects the repulsion and attraction phenomena of the projectiles within granular media. Empirical evidence shows that smaller initial separation distances lead to significant repulsion between projectiles upon impact. Once a specific separation distance is reached, the binary projectiles exhibit attractive behavior post-impact. Quantitative simulations clarify the observed repulsive and attractive phenomena by considering the force chain, thereby providing a deeper understanding of the dynamic impact process.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"27 3","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Granular Matter","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10035-025-01556-1","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Asteroid impacts are a significant area of study in astronomy; however, the specific impact properties of binary systems at close distances have not been extensively explored. This study employs a dual approach, combining low-velocity impact experiments with numerical simulations, to investigate the dynamic characteristics of binary projectiles at varying separation distances. Special focus is placed on how the initial separation distance affects the repulsion and attraction phenomena of the projectiles within granular media. Empirical evidence shows that smaller initial separation distances lead to significant repulsion between projectiles upon impact. Once a specific separation distance is reached, the binary projectiles exhibit attractive behavior post-impact. Quantitative simulations clarify the observed repulsive and attractive phenomena by considering the force chain, thereby providing a deeper understanding of the dynamic impact process.
期刊介绍：
Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science.
These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations.
>> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa.
The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.
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