Results 91 to 100 of about 2,822,738 (195)

Folded fabric tunes rock deformation and failure mode in the upper crust

Scientific Reports, 2017
The micro-mechanisms of brittle failure affect the bulk mechanical behaviour and permeability of crustal rocks. In low-porosity crystalline rocks, these mechanisms are related to mineralogy and fabric anisotropy, while confining pressure, temperature and
F. Agliardi, M. R. Dobbs, S. Zanchetta, S. Vinciguerra   +3 more
doaj   +1 more source

Second law of thermodynamics and the failure of rock materials [PDF]

, 2001
The relation of nonequilibrium thermodynamics to some failure and fracture theories of rock mechanics is investigated. The basic concepts are given to connect failure to the properties of material equations describing the elastic properties.
Ván, Péter, Vásárhelyi, Balázs
core  

Compressive damage constitutive model for brittle coal based on the compaction effect and linear energy dissipation law

International Journal of Coal Science & Technology
The study of the mechanical property and damage state of coal materials under compression is a fundamental area of research in underground mining engineering. Drawing upon the compaction effect and linear energy dissipation (LED) law, a novel compressive
Fengqiang Gong, Lei Xu, Mingzhong Gao, Yingjie Zhao, Peilei Zhang   +4 more
doaj   +1 more source

Damage evolution mechanism and low-damage grinding technology of silicon carbide ceramics

International Journal of Extreme Manufacturing
Silicon carbide (SiC) ceramics are extensively utilized in aerospace, national defense, and petrochemical industries due to their superior physical and chemical properties.
Chen Li, Kechong Wang, Oleg Zakharov, Hailong Cui, Mingtao Wu, Tianchen Zhao, Yongda Yan, Yanquan Geng   +7 more
doaj   +1 more source

Phase-field modeling of fracture for quasi-brittle materials

Underground Space, 2019
This paper addresses the modeling of fracture in quasi-brittle materials using a phase-field approach to the description of crack topology. Within the computational mechanics community, several studies have treated the issue of modeling fracture using ...
Jacinto Ulloa, Patricio Rodríguez, Cristóbal Samaniego, Esteban Samaniego   +3 more
doaj   +1 more source

Data-driven constitutive models for brittle solids displaying progressive anisotropic damage

Composites Part C: Open Access
We propose and demonstrate a computational framework to obtain data-driven surrogate constitutive models capturing the mechanical response of anisotropic brittle solids displaying progressive anisotropic damage.
Weijian Ge, Vito L Tagarielli
doaj   +1 more source

Mechanism investigation of scratch-induced ductile damage in brittle polylactic acid revealed by in situ observation [PDF]

Nanotechnology and Precision Engineering
Polylactic acid (PLA) is widely utilized across various fields for its excellent biocompatibility and mechanical properties. However, inevitable sharp-object contacts cause surface scratches, hindering performance optimization, owing to the poorly ...
Zhongmeng Zhu, Chutian Li, Jun Ma, Ziqi Wang, Han Jiang   +4 more
doaj   +1 more source

Crack fronts and damage in glass at the nanometer scale

, 2003
We have studied the low speed fracture regime for different glassy materials with variable but controlled length scales of heterogeneity in a carefully mastered surrounding atmosphere.
Bouchaud E, Célarié F, Dickelé A, Falk M L, Guilloteau E, Irwin G R, Janssen C, Lawn B R, Paun F, Pineau A, Poor C Y, Van Brutzel L, Van Brutzel L   +12 more
core   +1 more source

Damage Behaviour of Quasi-Brittle Composites: Mathematical and Computational Aspects

Applied Sciences
In the present paper, an evaluation of the damage behaviour of quasi-brittle composites exposed to mechanical, thermal, and other loads is studied by means of viscoelastic and/or viscoplastic material models, applying some non-local regularisation ...
Jiří Vala, Jiří Tomáš
doaj   +1 more source

Fatigue strength and durability analysis by normalised equivalent stress functionals [PDF]

, 2003
Generalised fatigue durability diagrams are considered for a material under multi-axial loading given by a (non-regularly) oscillating function of time.
Mikhailov, SE, Namestnikova, IV
core   +1 more source