Results 41 to 50 of about 24,678 (163)
Brittle creep, damage, and time to failure in rocks [PDF]
Journal of Geophysical Research: Solid Earth, 2006 We propose a numerical model based on static fatigue laws in order to model the time‐dependent damage and deformation of rocks under creep. An empirical relation between time to failure and applied stress is used to simulate the behavior of each element of our finite element model. We review available data on creep experiments in order to study how the
Amitrano, David, Helmstetter, A.
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Study on Progressive Failure of Hard Rock Tunnel After Excavation Under High Stress
Advances in Civil Engineering, 2022 The analysis and simulation of brittle failure of hard rock tunnels under high stress is essential for understanding and mastering the brittle failure characteristics of rock masses and for analyzing and regulating the stability of surrounding rocks in ...
Daning Zhong +4 more
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EPJ Web of Conferences, 2010 We present the results of recent dynamic fracture experiments [Scheibert et al., Phys. Rev. Lett. 104 (2010) 045501] on polymethylmethacrylate, the archetype of nominally brittle materials, over a wide range of crack velocities.
Bonamy D. +3 more
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Damage accumulation of bovine bone under variable amplitude loads
Bone Reports, 2016 Stress fractures, a painful injury, are caused by excessive fatigue in bone. This study on damage accumulation in bone sought to determine if the Palmgren-Miner rule (PMR), a well-known linear damage accumulation hypothesis, is predictive of fatigue ...
Abbey M. Campbell +3 more
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Journal of Materials Research and Technology, 2021 Machining-induced edge chipping damage represents a common challenge in ceramic applications. This paper reports on responses of zirconia materials with porous and dense microstructures to edge chipping damage induced in conventional and ultrasonic ...
Afifah Z. Juri +3 more
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International Journal of Mechanics, 2020 Computational modelling of damage in brittle and quasi-brittle materials needs some coupling between micro- and macroscopic crack initiation and evolution, up to their non-negligible softening behaviour. Most such approaches contain ad hoc evaluations, with some physical and engineering motivations, namely those connected with massive application of ...
Vala, Jiří +2 more
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Brittle damage models in DYNA2D [PDF]
, 1997 DYNA2D is an explicit Lagrangian finite element code used to model dynamic events where stress wave interactions influence the overall response of the system. DYNA2D is often used to model penetration problems involving ductile-to-ductile impacts; however, with the advent of the use of ceramics in the armor-anti-armor community and the need to model ...
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A nonlocal continuum damage model for brittle fracture
Engineering Fracture Mechanics, 2018 A nonlocal constitutive model for damageable brittle and quasi-brittle materials, capable of predicting multi-site damage initiation and arbitrary fracture paths, is developed as a general standard model. It is implemented as a VUMAT in Abaqus to simulate several cases to demonstrate its application.
Zhenyuan Gao, Liang Zhang, Wenbin Yu
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A Brittle Constitutive Law for Long‐Term Tectonic Modeling Based on Sub‐Critical Crack Growth
Geochemistry, Geophysics, GeosystemsAdequate representations of brittle deformation (fracturing and faulting) are essential ingredients of long‐term tectonic simulations. Such models commonly rely on Mohr‐Coulomb plasticity coupled with prescribed softening of cohesion and/or friction with
Léo Petit +4 more
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Truss-like Discrete Element Method Applied to Damage Process Simulation in Quasi-Brittle Materials
Applied Sciences, 2023 This paper discusses the combined application of the lattice discrete element method (LDEM) and the acoustic emission (AE) technique to analyze damage in quasi-brittle materials.
Boris Nahuel Rojo Tanzi +4 more
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