Stress distributions in bluntly-notched ceramic composite laminates

We present a methodology for determining stress distributions ahead of blunt notches in plates of fiber-reinforced ceramic–matrix composites subject to uniaxial tensile loading, accounting for the effects of inelastic straining due to matrix cracking. The methodology is based on linear transformatio...

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Veröffentlicht in:Composites. Part A, Applied science and manufacturing Jg. 60; S. 15 - 23
Hauptverfasser: Rajan, Varun P., Zok, Frank W.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Kidlington Elsevier Ltd 01.05.2014
Elsevier
Schlagworte:
A. Ceramic–matrix composites (CMCs)
B. Mechanical properties
C. Computational modeling
C. Finite element analysis
ceramics
composite materials
cracking
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
finite element analysis
Materials science
Other materials
Physics
prediction
Specific materials
B. Mechanical properties
A. Ceramic–matrix composites (CMCs)
C. Finite element analysis
C. Computational modeling
Constitutive equation
Ceramic matrix composite
Digital simulation
A. Ceramic-matrix composites (CMCs)
Fiber reinforced material
Mechanical properties
Experimental study
Mineral fiber
Laminates
Non oxide ceramics
Finite element method
Notch sensitivity
Silicon carbide
Composite materials
Stress distribution
Size effect
Modelling
Tensile properties
Ceramic fiber
ISSN:1359-835X, 1878-5840
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Beschreibung
Zusammenfassung:We present a methodology for determining stress distributions ahead of blunt notches in plates of fiber-reinforced ceramic–matrix composites subject to uniaxial tensile loading, accounting for the effects of inelastic straining due to matrix cracking. The methodology is based on linear transformations of the corresponding elastic distributions. The transformations are derived from adaptations of Neuber’s law for stress concentrations in inelastic materials. Comparisons are made with results computed by finite element analysis using an idealized (bilinear) form of the Genin–Hutchinson constitutive law for ceramic composite laminates. Effects of notch size and shape as well as the post-cracking tangent modulus are examined. The comparisons show that, for realistic composite properties, the analytical solutions are remarkably accurate in their prediction of stress concentrations and stress distributions, even in cases of large-scale and net-section inelasticity. Preliminary assessments also demonstrate the utility of the solution method in predicting the fields under multiaxial stressing conditions.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2014.01.010