An efficient binning scheme with application to statistical crack mechanics

2015 ◽  
Vol 105 (1) ◽  
pp. 33-62 ◽  
Author(s):  
F. Huq ◽  
R. Brannon ◽  
L. Graham-Brady
Keyword(s):  
Crack Mechanics

Nonlinear crack mechanics

1994 ◽  
Vol 30 (11) ◽  
pp. 827-833 ◽  
Author(s):  
L. P. Khoroshun
Keyword(s):  
Crack Mechanics ◽  
Nonlinear Crack

Failure Stress in Notched Paper Sheets

2013 ◽  
Vol 569-570 ◽  
pp. 417-424
Author(s):  
Carlos A. Mora Santos ◽  
Orlando Susarrey Huerta ◽  
Vicente Flores Lara ◽  
Jorge Bedolla Hernández ◽  
Maribel A. Mendoza Nuñez
Keyword(s):  
Crack Initiation ◽  
The Self ◽  
Stress Theory ◽  
Crack Initiation Stress ◽  
Notched Specimens ◽  
Random Array ◽  
Crack Mechanics ◽  
Theoretical Stress ◽  
Initiation Stress ◽  
Circular Notch

In this work the crack initiation stress of notched specimens of filter paper is studied. The paper in the microstructure has a random array in their fibers while macroscopically it behaves anisotropically. The self-affine crack mechanics is used to study the size effect in the tensile behavior of this kind of paper under the presence of several conditions of geometrical notches. While in the traditional fracture mechanics the crack initiation stress is a material parameter when is reached a critical level at the crack tip, in the self-affine crack mechanics, depends moreover of the resulting tortuosity of the crack. Four geometrical arrangements in two sizes we considered: centered circular notch, centered lineal notch, sided circular notches and without notch at 10 and 300 mm width with a relation 2a/w = 0.25 under the same loading conditions. In this, the without notch specimens present the higher stress, all other notched specimens presented a similar crack initiation stress about 1 % of difference among them, and the crack growth is not affected by the geometry of notch. In spite of this difference, no one of the specimens reach the theoretical stress concentration of 3 such as predicted the classical stress theory.

scholarly journals Impact Strength of Composite Materials Based on EN AC-44200 Matrix Reinforced with Al2O3 Particles

2017 ◽  
Vol 17 (3) ◽  
pp. 73-78 ◽  
Author(s):  
A. Kurzawa ◽  
J.W. Kaczmar
Keyword(s):  
Composite Materials ◽  
Impact Strength ◽  
Elevated Temperatures ◽  
Al Alloy ◽  
Pressure Infiltration ◽  
Reinforcing Particles ◽  
Strength Based ◽  
Crack Mechanics ◽  
The Matrix ◽  
Microscopic Studies

AbstractThe paper presents the results of research of impact strength of aluminum alloy EN AC-44200 based composite materials reinforced with alumina particles. The research was carried out applying the materials produced by the pressure infiltration method of ceramic preforms made of Al2O3particles of 3-6μm with the liquid EN AC-44200 Al alloy. The research was aimed at determining the composite resistance to dynamic loads, taking into account the volume of reinforcing particles (from 10 to 40% by volume) at an ambient of 23°C and at elevated temperatures to a maximum of 300°C. The results of this study were referred to the unreinforced matrix EN AC-44200 and to its hardness and tensile strength. Based on microscopic studies, an analysis and description of crack mechanics of the tested materials were performed. Structural analysis of a fracture surface, material structures under the crack surfaces of the matrix and cracking of the reinforcing particles were performed.

Relation between Effectiveness of the Non-Linear Crack Mechanics and Crack Length

2008 ◽  
Vol 2 (1) ◽  
pp. 111-117
Author(s):  
Takahiro TERANISHI ◽  
Hironobu NISITANI ◽  
Kuniharu USHIJIMA
Keyword(s):  
Crack Length ◽  
Crack Mechanics ◽  
Non Linear

Study of Deformation and Breakage Characters in Coal Seam Floor under the Condition of Mining

2010 ◽  
Vol 160-162 ◽  
pp. 256-259
Author(s):  
Zhong Chang Wang
Keyword(s):  
Water Pressure ◽  
Coupling Model ◽  
Rock Layer ◽  
Crack Mechanics ◽  
Fluid Coupling ◽  
The Difference ◽  
Mining Pressure ◽  
Water Bursting ◽  
Water Holding ◽  
Solid Fluid Coupling

The water bursting disaster from the floor of mine is a complicated program involving several of subjects such as geology, coal mining, rock hydraulics and rock crack mechanics. In the paper, the two dimensional non-linear solid-fluid coupling model is used to study the difference of the water-holding capacity of the different floor combination under the condition of mining. The mini damage rock layer combination is obtained by analyzing the failure extent of floor under the mining pressure and water pressure. The water resisting capacity of the combination of b is the worst. The water resisting capacity of the combination of c is the best.

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