ISSN:
1573-9066
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Summary The strength of brittle materials of the cermet type can be expressed by the product of two functions, one of which is a function of the tensor invariants of the given material, or of the class of materials, and defines the limiting surface in terms of the principal axes, whereas the second, being a function of the volume of the deformed material and containing some constants, bears a statistical character. The function of the stress tensor invariants in the material examined neither qualitatively nor quantitatively fits in the classical strength theories extensivly applied to brittle materials. The experimentally determined limiting curve bears a qualitative character precisely as do the theoretical limiting curves which are used as starting points in the extension of energy hypotheses to brittle materials. The maximum shear stress at the moment of rupture as a function of the mean of the principal tensor components is fairly well described by a second-order curve. By extrapolation of this curve to the region of biaxial compression we constructed the limiting curve in the third quadrant of the stress field. Owing to the great micrononuniformity of the material examined and its specific properties, the results obtained, of course, cannot be extended to the wide class of brittle materials. This calls for further experiments on other cermets and larger samples.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00774196
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