@inproceedings{0642fcd663d4410eb3f302c5394c4b70,
title = "Transitional negative stiffness and numerical modelling of failure of particulate material",
abstract = "We observed negative stiffness effect during the bond breakage in a simple 4 discs PFC 2D simulation. This negative stiffness effect only exists during the transitional time during which the model regains equilibrium. We subsequently call this negative stiffness effect - transitional negative stiffness effect. It can be shown the instability of geomaterials is reached when the (incremental) Poisson{\textquoteright}s ratio reached value of 1(2D case). Hence we embarked on verifying the hypothesis that the peak load coincides with the critical incremental Poisson{\textquoteright}s ratio. We demonstrate that the peak on the stress-strain curve corresponds to the incremental Poisson{\textquoteright}s ratio reaching 1. This gives a confirmation that the transitional negative stiffness can be responsible for the global instability of particulate materials.",
author = "Y. Xu and Dyskin, {A. V.} and E. Pasternak",
year = "2017",
language = "English",
series = "9th Australasian Congress on Applied Mechanics, ACAM 2017",
publisher = "Engineers Australia",
pages = "798--803",
booktitle = "9th Australasian Congress on Applied Mechanics (ACAM9)",
address = "Australia",
note = "9th Australasian Congress on Applied Mechanics , ACAM9 ; Conference date: 27-11-2017 Through 29-11-2017",
}