Download Anisotropy and Localization of Plastic Deformation: by Jacob Aboudi (auth.), Jean-Paul Boehler, Akhtar S. Khan PDF

By Jacob Aboudi (auth.), Jean-Paul Boehler, Akhtar S. Khan (eds.)

Present advancements in fabrics technological know-how, mechanics and engineering, in addition to the calls for of recent know-how, lead to a brand new and starting to be curiosity in plasticity and in bordering domain names of the mechanical habit of fabrics. This starting to be curiosity is attested to by way of the luck of either The foreign magazine of Plasticity, which after its inception speedily turned the prime magazine for plasticity learn, and the sequence ofInternational Symposia on Plasticity and Its present functions, that's now the optimum foreign discussion board for plasticity examine dissemination. the 1st foreign Symposium on Plasticity and Its present purposes was once conceived and arranged via Professor Akhtar S. Khan, and used to be held on the collage of Oklahoma (Norman, Oklahoma, united states) from July 30 to August three, 1984. It was once attended by way of over 100 scientists from fifteen nations. "Plasticity '89: the second one overseas Symposium on Plasticity and Its present functions" used to be held at Mie collage (Tsu, Japan) from July 31 to August four, 1989; this symposium used to be co-chaired by way of Professors Khan and Tokuda. the most emphasis of this assembly was once on dynamic plasticity and micromechanics, even though it incorporated different facets of plasticity to boot. It used to be attended by means of over 200 researchers from twenty-three nations.

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Academic Press, New York, 1968, pp. 68-190. 3. C. , Stress Analysis of Cracks, ASTM STP 381, Am. Soc. , 1965, pp. 30-8l. 4. , Mechanics of Crack Tip Deformation and Extension by Fatigue, ASTM STP 415, Am. Soc. , 1967, pp. 247-309. 5. , On the Theory of Perfectly Plastic Anti-Plane Straining, Report NSF GT 286/2, Div. , March 1966. M. SPENCER Department of Theoretical Mechanics, University of Nottingham, Nottingham, NG7 2RD, England ABSTRACT We formulate the governing equations for a thermoelastic-plastic material, which has orthotropic symmetry for both its thermal and its mechanical response.

Here we deal with the macroscopic behaviour, and treat the composite material as an elastic-plastic continuum, taking into account the effect of thermal expansion. We formulate constitutive equations for such a material, along the lines of classical plasticity theory, using a yield condition which is a generalization of von Mises condition for isotropic materials. As an application we analyse the thermal distortion of channel sections. The corresponding thermoelastic problem was studied by O'Neill, Rogers and Spencer [2].

C. 703-708. 4. , and J. Proubet, 1990, "A numerical investigation of the structure of persistent shear bands in granular materials," accepted for publication in Geotechnique. 5. 148-159. 6. , and J. Proubet, 1989, "Adaptative dynamic relaxation for statics of granular materials," Computers & Structures, in press. 7. , and J. Proubet, 1989, "JP2, a program to simulate the behavior of twodimensional granular materials," Univ. of Southern California, LA. S. /Universite Paris 6 61, Avenue du President Wilson, 94235-CACHAN, France ABSTRACT The conditions for the localization of the deformation in rate-independent materials, understood as a first order bifurcation, are obtained by the analysis of the rate problem.

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