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On the Crack Tip Shielding in Particle Reinforced Composites
Materials Science Forum, 2005The paper is focused on crack-tip shielding effects caused by crack deflection (tilting) processes in particle reinforced composites. A numerical analysis by means of the ANSYS code was employed in order to assess these effects caused by rigid particles and holes in the matrix.
Jana Horníková +2 more
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Multiscale simulation of crack tip shielding by a dislocation
Acta Materialia, 2008Crack tip shielding by dislocations is an essential feature of the modeling of semi-brittle crack propagation and the brittle to ductile transition. The stress field, in the elementary configuration where a single dislocation interacts with a crack, is obtained by two independent methods, at two different scales. Analytical formulas, by Lin and Thomson,
D. Tanguy +2 more
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Dislocation crack tip shielding and the Paris exponent
Materials Science and Engineering: A, 2007Abstract In a previous paper we considered how the crack blunting dislocation emission mechanism likely leads to a Paris fatigue crack growth rate law exponent n = 2 if dislocation shielding is not important and showed how dislocation crack tip shielding can cause a reduction in the fatigue crack growth rate and showed qualitatively how it ...
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The shielding effects of the crack-tip plastic zone
International Journal of Fracture, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhu, P., Yang, L., Li, Z., Sun, J.
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Stress intensity factors for crack tip shielding or anti-shielding by impurity atoms
International Journal of Fracture, 1986The average value of the crack tip stress intensity factor produced by a row of impurity atoms is calculated in this paper. The row of impurity atoms lies parallel to the crack front and is situated at an arbitrary position about a crack. The impurity atom produced mode I shielding/antishielding stress intensity factor LiI for a row of impurity atoms ...
J. Weertman, J. E. Hack
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Crack-tip amplification and shielding by micro-cracks in piezoelectric solids – Part I: Static case
Engineering Analysis with Boundary Elements, 2013zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lei, Jun +3 more
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Engineering Analysis with Boundary Elements, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jun Lei +2 more
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jun Lei +2 more
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Strengthening Mechanisms in MLCCs: Residual Stress Versus Crack Tip Shielding
Journal of the American Ceramic Society, 2013Failure by fracture is a serious problem with multilayer ceramic capacitors (MLCCs), and the interior electrodes are known to strengthen MLCCs. Historically, it has been assumed that the dominant strengthening mechanism is crack tip shielding via direct crack tip‐electrode interactions.
Wade R. Lanning +1 more
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Journal of Mechanical Science and Technology, 2012
In this letter, the shielding or anti-shielding effect is firstly applied to obtain the behavior of two parallel cracks in a two-dimensional type-II superconducting under electromagnetic force. Fracture analysis is performed by the finite element method and the magnetic behavior of superconductor is described by the critical state Bean model.
Zhi-Wen Gao, Kang Yong Lee, You-He Zhou
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In this letter, the shielding or anti-shielding effect is firstly applied to obtain the behavior of two parallel cracks in a two-dimensional type-II superconducting under electromagnetic force. Fracture analysis is performed by the finite element method and the magnetic behavior of superconductor is described by the critical state Bean model.
Zhi-Wen Gao, Kang Yong Lee, You-He Zhou
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Modelling Crack-Tip Shielding Effects in Particle Reinforced Composites
2008When a crack propagates in particle reinforced composites, the particles induce various shielding effects at its tip. These effects can either increase or decrease the crack driving force which is reflected in the change of fracture toughness of a composite.
Jana Hornikova +2 more
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