2020
DOI: 10.1007/s10346-020-01556-7
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A calculation model of the normal coefficient of restitution based on multi-factor interaction experiments

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Cited by 12 publications
(3 citation statements)
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“…In actual rockfall events, moving rockfalls are often accompanied by certain rotational speeds, which generally undergo noticeable changes after impact, including increasing, decreasing, or reversing (Buzzi et al, 2012;Dattola et al, 2021;Ji et al, 2021). For rockfalls that have undergone RR after impact, they experience more two impacts when they make contact with the slope again.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…In actual rockfall events, moving rockfalls are often accompanied by certain rotational speeds, which generally undergo noticeable changes after impact, including increasing, decreasing, or reversing (Buzzi et al, 2012;Dattola et al, 2021;Ji et al, 2021). For rockfalls that have undergone RR after impact, they experience more two impacts when they make contact with the slope again.…”
Section: Discussionmentioning
confidence: 99%
“…In the existing studies on the influence of the RS on the RC, only the case in which the rotation of the block is in the downhill direction (i.e., forward rotation) is considered (Figure 1A), while the reverse rotation (RR) (uphill direction, Figure 1B) of the block is often ignored (Spadari et al, 2012;Dattola et al, 2021;Tang et al, 2021;Chen et al, 2023). It seems that this situation does not exist in general cognition; however, in our recent experimental studies on the RC, we have observed the frequent occurrence of this phenomenon (Ji et al, 2019;Ji et al, 2021). In particular, for specially shaped blocks with initial rotational speeds (such as cuboids, cubes, and cylinders), the probability of the blocks obtaining the reverse rotation speeds after impacting a dense rock slope is approximately 25% based on the team's comprehensive analysis and statistics regarding the process images of more than 1000 groups of impact tests of nonspherical blocks (including tests with and without an initial rotational speed) (Table 1 presents some experimental data).…”
Section: Introductionmentioning
confidence: 93%
“…However, a common feature in current theories regarding the coefficient of restitution is that they often overestimate its value by tens of percentage points compared with physical measurements [9]. An increasing number of studies have shown that the main reason for this is that the NCOR is not a simple material constant but is controlled by a variety of factors, and the influencing mechanism is complex [10]. Therefore, a comprehensive and accurate calculation model for reference does not currently exist.…”
Section: Introductionmentioning
confidence: 99%