Results 271 to 280 of about 2,504,311 (348)

GRADIENT ENHANCED DAMAGE FOR QUASI-BRITTLE MATERIALS

International Journal for Numerical Methods in Engineering, 1996
Summary: Conventional continuum damage descriptions of material degeneration suffer from loss of well-posedness beyond a certain level of accumulated damage. As a consequence, numerical solutions are obtained which are unacceptable from a physical point of view.
Peerlings, R.H.J., Borst, de, R., Brekelmans, W.A.M., Vree, de, J.H.P.   +3 more
openaire   +3 more sources

Gradient-extended brittle damage modeling

2020
An elastic-brittle anisotropic model is presented based on the work by Fassin et al. (2019a). After discussing the local model equations and the incorporation of crack-closure, the gradient extension using the micromorphic approach according to Forest (2009) is briefly summarized.
T.T. Nguyen, M. Fassin, R. Eggersmann, S. Reese, S. Wulfinghoff   +4 more
openaire   +1 more source

Condition insensitive damage indicator for brittle rock

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1997
Abstract The authors have been seeking a ‘condition insensitive damage indicator’ for brittle rock. It is defined here as a measurable physical quantity and has a certain value at the peak load. It should be insensitive to experimental conditions such as confining pressure, loading rate, water content etc.
Y. Fujii, T. Kiyama, Y. Ishijima
openaire   +1 more source

Threshold-based Quasi-static Brittle Damage Evolution

Archive for Rational Mechanics and Analysis, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
GARRONI, Adriana, Christofer Larsen
openaire   +1 more source

Friction-damage coupled model for brittle materials

Engineering Fracture Mechanics, 2004
By considering a tensorial description of the damage and of the unilateral and frictional effects on the displacement jump across the crack faces, an anisotropic constitutive model based on the assumption of linear elastic matrix weakened by microcraks is derived.
openaire   +3 more sources

Dynamic damage evolution in brittle solids

Mechanics of Materials, 1992
Abstract For brittle solids containing preexisting microflaws, a two-dimensional model is developed to simulate dynamic damage evolution in uniaxial compression. Frictional, and rate-dependent and rate-independent plastic constitutive relations are considered to describe the deformation of preexisting microflaws.
H. Deng, S. Nemat-Nasser
openaire   +1 more source

Elastic-Brittle Damage

2011
Besides ductile materials considered hitherto, a variety of brittle materials, like concrete, rocks and ceramics, are widely employed in engineering practice. Their mechanical behavior can not be described by the elastic-plastic damage theory or by the viscoplastic damage theory discussed already.
openaire   +1 more source

A second strain gradient damage model with a numerical implementation for quasi-brittle materials with micro-architectures

Mathematics and mechanics of solids, 2020
In this paper, a quasi-brittle damage model for micro-architectural materials is presented within the framework of isogeometric analysis to exploit the high-order continuity of the non-uniform B-spline basis functions.
T. Nguyen, J. Niiranen
semanticscholar   +1 more source

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
openaire   +1 more source

Investigating brittle damage of buried pipelines under dip-slip faulting with peridynamics

Acta Geotechnica, 2022
Panyu Liao, Chengchao Guo, Fuming Wang, Wei Sun, P. Ni   +4 more
semanticscholar   +1 more source