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Article
Open AccessScale-free bursting activity in shrinkage induced cracking
Based on computer simulations of a realistic discrete element model we demonstrate that shrinkage induced cracking of thin layers of heterogeneous materials, generating spectacular crack patterns, proceeds in ...
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Article
Open AccessScaling laws of failure dynamics on complex networks
The topology of the network of load transmitting connections plays an essential role in the cascading failure dynamics of complex systems driven by the redistribution of load after local breakdown events. In p...
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Article
Open AccessCurvature flows, scaling laws and the geometry of attrition under impacts
Impact induced attrition processes are, beyond being essential models of industrial ore processing, broadly regarded as the key to decipher the provenance of sedimentary particles. Here we establish the first ...
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Article
Open AccessRecord statistics of bursts signals the onset of acceleration towards failure
Forecasting the imminent catastrophic failure has a high importance for a large variety of systems from the collapse of engineering constructions, through the emergence of landslides and earthquakes, to volcan...
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Crackling Noise in Digital and Real Rocks–Implications for Forecasting Catastrophic Failure in Porous Granular Media
‘Crackling noise’ in a wide variety of systems that respond to steady-state external forcing in an intermittent way, leading to sudden bursts of energy release similar to those heard when crumpling a piece o...
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Article
Mass-velocity correlation in impact induced fragmentation of heterogeneous solids
We study the impact fragmentation of disordered solids by means of a discrete element model focusing on the velocity and mass-velocity correlation of fragments. Simulations are performed with plate-like object...
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Article
Open AccessUniversality of fragment shapes
The shape of fragments generated by the breakup of solids is central to a wide variety of problems ranging from the geomorphic evolution of boulders to the accumulation of space debris orbiting Earth. Although...
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Article
From fracture to fragmentation: Discrete element modeling
Discrete element modelling (DEM) is one of the most efficient computational approaches to the fracture processes of heterogeneous materials on mesoscopic scales. From the dynamics of single crack propagation t...
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Article
Open AccessCreep rupture as a non-homogeneous Poissonian process
Creep rupture of heterogeneous materials occurring under constant sub-critical external loads is responsible for the collapse of engineering constructions and for natural catastrophes. Acoustic monitoring of c...
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Article
Creep rupture due to thermally induced cracking
We study sub-critical fracture driven by thermally activated crack nucleation in the framework of a fiber bundle model. Based on analytic calculations and computer simulations we show that in the presence of s...
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Article
Extension of fibre bundle models for creep rupture and interface failure
We present two extensions of the classical fibre bundle model to study the creep rupture of heterogeneous materials and the shear failure of glued interfaces of solid blocks. To model creep rupture, we assume ...
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Article
Study on the fragmentation of shells
Fragmentation can be observed in nature and in everyday life on a wide range of length scales and for all kinds of technical applications. Most studies on dynamic failure focus on the behaviour of bulk systems...
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The Social System of National Health Care and System of Human Society
In this paper I continue the considerations of a former one, published in the Proceedings of the Conference on the Operational Research and the Social Sciences /Kun 1989/.
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Chapter
The Social System of National Health Care
Scientists who have a certain feeling of responsibility for the fate and future of mankind draw our attention much more often and more definitely to the fact that the development of society is impossible in th...
