o:2597 Friction and Stiffness Dependent Dynamics of Accumulation Landslides with Delayed Failure en Abstract: We propose a new model for landslide dynamics under the assumption of a delay failure mechanism. Delay failure is simulated as a delayed interaction between adjacent blocks, which mimics the relationship between the accumulation and feeder part of the accumulation slope. The conducted research consisted of three phases. Firstly, the real observed movements of the landslide were examined to exclude the existence or the statistically significant presence of background noise. Secondly, we propose a new mechanical model of an accumulation landslide dynamics, with introduced delay failure, and with variable friction law. Results obtained indicate the onset of a transition from an equilibrium state to an oscillatory regime if delayed failure is assumed for different cases of slope stiffness and state of homogeneity/heterogeneity of the slope. At the end, we examine the influence of different frictional properties (along the sliding surface) on the conditions for the onset of instability. Results obtained indicate that the increase of friction parameters leads to stabilization of sliding for homogeneous geological environment. Moreover, increase of certain friction parameters leads to the occurrence of irregular aperiodic behavior, which could be ascribed to the regime of fast irregular sliding along the slope. landslide monitoring; nonlinear time series analysis; determinism; bifurcation; stiffness; time delay; friction; homogeneity and heterogeneity 1552101 1099-4300 1552099 10.3390/e25071109 2023-07-28T11:17:42.478Z 44 no 46 Srđan Kostić Institut za vodoprivredu "Jaroslav Černi" ; Jaroslav Černi Water Institute 0000-0002-3705-3080 Dragan Prekrat Faculty of Pharmacy, University of Belgrade person Žarko Lazarević China Road and Bridge Corporation Serbia, Belgrade person Kristina Todorović Faculty of Pharmacy, University of Belgrade person application/pdf 18554156 https://unilib.phaidrabg.rs/o:2597 no yes 16 70 92000001 71A04 Entropy: international and interdisciplinary journal of entropy and information studies 25 1109 1 17 MDPI, Basel, Switzerland 2023 Received: 14 June 2023 Revised: 12 July 2023 Accepted: 21 July 2023 Published: 24 July 2023