Results 21 to 30 of about 213,966 (314)
Rock and soil damage-fracture space mechanics: Damage-fracture space [PDF]
Proceedings on Intelligent Systems and Knowledge Engineering (ISKE2007), 2007 Each of the current analytical methods used in rock and soil CT mechanics is “observation”, wasting the precious CT quantitative information. Utilizing the CT number, the perfect degree and the damage-fracture degree of a point inside the rock sample are defined, the λ level perfect field, the λ level damage-fracture field and the λ1-λ2 level ...
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Statistical properties of fractures in damaged materials [PDF]
Europhysics Letters (EPL), 1999 We introduce a model for the dynamics of mud cracking in the limit of of extremely thin layers. In this model the growth of fracture proceeds by selecting the part of the material with the smallest (quenched) breaking threshold. In addition, weakening affects the area of the sample neighbour to the crack.
A Gabrielli, R Cafiero, G Caldarelli
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Analysis of Tunnel Lining Failure Mechanism under the Action of Active Fault
Shock and Vibration, 2021 The underground structure that crosses the active fault will cause more serious damage under the dislocation of the active fault. Relying on an actual tunnel in the southwest mountainous area to establish a three-dimensional finite element model, the ...
Sujian Ma +5 more
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Fracture and damage analysis in design [PDF]
Engineering Fracture Mechanics, 2012 This Special Issue contains selected papers presented at the XXIX National Conference of the Italian Association for Stress Analysis (AIAS), held in Maratea, organized by University of Calabria, (Italy) from 7 to 10 September 2010. This Conference is focussed on several topics, the common matrix being always the (experimental but also numerical and ...
Laura Vergani, Renzo Capitani
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Shock and Vibration, 2021 The different directions of joints in rock will lead to great differences in damage evolution characteristics. This study utilizes DIP (digital image processing) technology for characterizing the mesostructure of sandstone and combines DIP technology ...
Hao Liu +9 more
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Rock and soil damage-fracture space mechanics: The divisional damage-fracture theory [PDF]
Proceedings on Intelligent Systems and Knowledge Engineering (ISKE2007), 2007 This article points out each of the current analytical methods used in CT mechanics of rock and soil avail of observation, wasting the precious quantitative information of CT datum. Based on the conception of the intercepted section in the damage-fracture space, utilizing the knowledge of the set theory, the measure theory and the Lebesgue integral ...
Xiaotao Yin +3 more
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Turbulent Fracture Surfaces: A Footprint of Damage Percolation? [PDF]
Physical Review Letters, 2015 We show that a length scale xi can be extracted from the spatial correlations of the "steep cliffs" that appear on fracture surface. Above xi, the slope amplitudes are uncorrelated and the fracture surface is mono-affine. Below xi, long-range spatial correlation lead to a multi-fractal behavior of the surface, reminiscent of turbulent flows.
Vernède, Stéphane +2 more
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International Journal of Solids and Structures, 2021 In this study, we follow the work of Tvergaard and Needleman (1995, 1997) and Needleman and Tvergaard (1998) and present the numerical implementation and initial applications of a non-local Gurson-Tvergaard-Needleman (GTN) model for explicit finite ...
Sondre Bergo, D. Morin, O. Hopperstad
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Interlocking thin-ply reinforcement concept for improved fracture toughness and damage tolerance
Composites Science And Technology, 2019 An original concept for improving the delamination resistance and damage tolerance of a composite laminate is proposed. The concept is to insert interlocked thin-ply reinforcement units between the laminae.
J. Pascoe, S. Pimenta, S. Pinho
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A simple damage and fracture model of brain parenchyma for haptic brain surgery simulations
Journal of Biomechanical Science and Engineering, 2016 Dissection and removal of lesion areas are fundamental operations in brain surgeries. Therefore, damage and fracture models are needed to simulate dissection and removal operations.
Xiaoshuai CHEN +4 more
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