In the risk assessment of soil movement, the comprehension of unexpected collapses involving creeping landslides is crucial. The transition from creeping to fast landslides is very hard to justify theoretically and simulate numerically. In this paper, the authors intend to demonstrate that even the integration of a basic elastic strain softening constitutive relationship under simple shear conditions is sufficient to capture such a transition. With this aim, an infinite slope, a homogeneous cemented/bonded soil and an oscillating water table level are considered. The onset of instability is shown to be anticipated by a local increase in strain rate within the shear band, behaving like a precursory signal. The size of the shear band, evolving with time and not depending only on the material grain size distribution, is governed by both the amplitude of the imposed perturbation and the material constitutive parameters.

中文翻译：

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弹粘塑性介质中的进行性衰竭：从理论到实践

在土壤运动的风险评估中，理解涉及蠕动滑坡的意外崩塌至关重要。从蠕变到快速滑坡的过渡很难从理论上证明和数值模拟。在本文中，作者打算证明即使简单剪切条件下的基本弹性应变软化本构关系的积分也足以捕获这种转变。为了这个目的，考虑了无限的斜坡，均匀的胶结/粘结土壤和振荡的地下水位。不稳定的发生是通过剪切带内应变率的局部增加来预料的，其行为类似于先兆信号。剪切带的大小随时间而变化，不仅取决于材料的晶粒尺寸分布，