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  • 1
    Electronic Resource
    Electronic Resource
    Thermal and mechanical induced stresses in superconducting YBa2Cu3Ox coatings on fibers (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 1337-1344 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermal stresses induced during cooling from the fabrication temperature of a fiber with a noncubic superconducting ceramic coating are analyzed theoretically. The coating considered has a preferred crystallographic orientation such that the c axis of the coating material is perpendicular to the fiber surface which, in turn, results in different thermal expansion coefficients in the radial and the tangential directions in the coating. The thermal stresses are shown to result both from the mismatch between the fiber and the coating, and from the thermal expansion anisotropy of the coating. Stresses due to bending of the fiber/coating to form a superconducting component are also addressed. A critical radius of curvature of bending is obtained below which segmentation of the coating is predicted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349590
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of residual stress on thermal expansion behavior (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 3294-3296 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We demonstrate that the thermal expansion behavior of a material can be substantially modified by the presence of residual stresses. In the case of a composite tube made of two layers of dissimilar steels, in situ neutron diffraction measurements revealed a significant difference in the coefficients of thermal expansion along the radial and tangential directions. It is shown that the observed difference in thermal expansion is due to the change of residual stresses with temperature. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125329
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  • 3
    Electronic Resource
    Electronic Resource
    Stress Distributions in Thin Bilayer Discs Subjected to Ball-On-Ring Tests (2005)
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Ball-on-ring tests have been used extensively to measure the biaxial strength of brittle materials. However, the tests and analyses are limited to materials of uniform properties. An analytical model is developed in the present study to analyze thin bilayer discs subjected to ball-on-ring tests. It is found that closed-form solutions for bilayer discs can be obtained from existing solutions for monolayer discs by replacing the position of the neutral surface and the flexural rigidity of monolayers with those of bilayers. To validate the analytical solutions for bilayers, ball-on-ring tests are performed on a thin Al2O3 scale grown on an oxide dispersion-strengthened FeCrAl alloy disc and photo-stimulated luminescence spectroscopy is used to measure the stress distributions in the Al2O3 layer. In this case, the stress-induced peak shift of the R lines emitted by the Al2O3 scale is used to determine the average stress through the scale thickness. Good agreement between predictions and measurements is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00343.x
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  • 4
    Electronic Resource
    Electronic Resource
    Matrix Cracking Stresses of Unidirectional Ceramic Matrix Composites (1995)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 108-110 (July 1995), p. 457-458 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/44/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.108-110.457.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Residual stress and strain in pyrolytic boron nitride resulting from thermal anisotropy (1988)
    Springer
    Journal of materials science 23 (1988), S. 1901-1905 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Residual stresses in chemically deposited pyrolytic boron nitride (PBN) crucibles caused by thermal expansion anisotropy during cooling immediately following deposition are analysed. The calculations reveal that radial tension and combined tangential tension and compression exist in the crucible. The maximum stresses increase with an increase in the thickness of the crucible. Furthermore, while the outer wall of the crucible always shrinks upon cooling, the inner wall may expand, due to the residual stress states, resulting in a negative effective thermal expansion coefficient in the tangential direction. The influence of the PBN attachment to the mandrel on which it is deposited is also considered. Specifically, the radial tensile stress in the crucible is shown to increase due to this attachment, which in turn, enhances the delamination of the crucible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01115748
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  • 6
    Electronic Resource
    Electronic Resource
    Consideration of radial dependences of axial stresses in the shear-lag model for fibre pull-out (1994)
    Springer
    Journal of materials science 29 (1994), S. 1801-1806 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The shear-lag model has been used extensively to analyse stress transfer during single-fibre pull-out. To achieve analytical solutions, the radial dependences of the axial stresses in the fibre and the matrix are generally ignored in the shear-lag model. The present study considered these radial dependence in the shear-lag model. The differences between the predictions obtained by ignoring these radial dependences, considering the radial dependence of the axial stress in the fibre only, considering the radial dependence of the axial stress in the matrix only, and considering both radial dependences, have been addressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351299
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  • 7
    Electronic Resource
    Electronic Resource
    Some considerations of asymmetric cracking in an applied-moment double cantilever beam (1998)
    Springer
    Journal of materials science 33 (1998), S. 3891-3898 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In situ observations of crack propagation in applied-moment double cantilever beam specimens have been used to obtain the R-curve behaviour of Si3N4/50% BN–50% Al2O3 laminated composites, in which the BN–Al2O3 layers function as weak interphases. The crack plane and the crack direction were, respectively, normal and parallel to the plane of the laminated layers. During crack propagation, both delamination and crack deviation from the centreline of the specimen occurred. A deviated crack resulted in an uneven moment of inertia in the two beams of the specimen. For a non-laminated material, a deviated crack would become unstable, such that the crack would propagate towards the beam with the smaller moment of inertia. It was found in the present study that delamination in a laminated composite can stabilize the propagation of a deviated crack. The stabilization of a deviated crack with delamination was due to a decrease in the inequality in the moment of inertia of the two beams compared to that without delamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004628225130
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  • 8
    Electronic Resource
    Electronic Resource
    Some considerations of two-way debonding during fibre pull-out (1993)
    Springer
    Journal of materials science 12 (1993), S. 1933-1936 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00882547
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  • 9
    Electronic Resource
    Electronic Resource
    Matrix cracking with bonded interfaces in unidirectional fibre-reinforced composites (1995)
    Springer
    Journal of materials science 14 (1995), S. 1698-1701 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422679
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  • 10
    Electronic Resource
    Electronic Resource
    The relative residual fibre displacement after indentation loading and unloading of fibre-reinforced ceramic composites (1993)
    Springer
    Journal of materials science 28 (1993), S. 2227-2232 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The interfacial properties of fibre-reinforced ceramic composites have been evaluated by using the indentation technique. The ratio of the residual fibre displacement after complete unloading to the fibre displacement at peak loading is examined. Assuming a constant interfacial shear stress at an unbonded interface, this ratio is 0.5. However, deviation of this ratio from 0.5 is always obtained from experimental results. Both Poisson's effect and the existence of the residual axial stress have been proposed to explain this deviation. A methodology is presented in this study to classify conditions for which either Poisson's effect or the residual axial stress dominates this deviation. The application of this methodology to Nicalon fibre-reinforced lithium aluminosilicate glass-ceramic is also illustrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00367588
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