منابع مشابه
Behavior of cracked materials
Abstract. Due to their microstructure, quasi brittle materials present rough cracks. Under sliding of the crack lips, this roughness involves in one hand induced opening and in the other hand some apparent plasticity which is due to the interlocking of the crack lips combined with Coulomb’s friction. The proposed model is written under the irreversible thermodynamics framework. Micromechanics u...
متن کاملNumerical Homogenization of Elastic Behavior of Fractured Rock Masses and Micro-cracked Materials by FEM
A review of recent works on numerical homogenisation of fractured rock masses gives witness of difficulties in defining rigorously and determining numerically the macroscopic strain and stress that are to be used in upscaling relations. Moreover, for finite-size domains, relations between macroscopic strain and stress are dependant on boundary conditions and this constitutes an additional diffi...
متن کاملBounds on the Effective Moduli of Cracked Materials
We find bounds on the effective elastic moduli of cracked materials in terms of the effective conductivity of such media. These represent the first non-trivial bounds on the effective properties of cracked media which are independent of the shapes and spatial distribution of the cracks. Different approximations for the elastic moduli of cracked media are tested against our bounds. The microgeom...
متن کاملAnalyzing Some Behavior of a Cracked Beam under Pressure
In this paper, a simple cracked beam under vertical pressure is considered. Stress intensity factor, normal, and shear stresses (at the tip of the crack) are calculated with finite element software. Results are compared when there is contact between crack surfaces with different direction of pressure, and when there is no contact. Results show that stress intensity factors can be implemented fo...
متن کاملFracture Behavior Prediction for Rapidly Loaded Surface Cracked Specimens
The feasibility of predicting the fracture behavior of surface cracks from shallow cracked bend specimens was investigated. The material studied was a high-strength steel stress relief embrittled to various levels of Charpy-V notch impact toughness. Material toughness was quantified in terms of the J-intergral at total specimen failure (-/„,,), using both deeply notched and shallow-notched bend...
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ژورنال
عنوان ژورنال: Key Engineering Materials
سال: 2007
ISSN: 1662-9795
DOI: 10.4028/www.scientific.net/kem.348-349.589