Papers - OBATA Makoto

Branched cracks in anisotropic elastic solids Reviewed

M. OBATA, S. NEMAT-NASSER, Y. GOTO

J. Appl. Mech.   56   858 - 864   1989.04

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Branched cracks in anisotropic elastic solids Reviewed

Makoto Obata, Siavouche Nemat-Nasser, Yoshiaki Goto

Journal of Applied Mechanics, Transactions ASME   56 ( 4 )   858 - 864   1989

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Language：English   Publishing type：Research paper (scientific journal)  

Branched crack problems are analyzed in two-dimensional, anisotropically elastic homogeneous solids. The method of analysis is based on the complex variable approach of Savin and Lekhnitskii. The Hilbert problem in an anisotropic body is defined, and a pair of singular integral equations are derived for dislocation density functions associated with a branched crack. For both symmetric and nonsymmetric geometries, and under symmetric and antisymmetric loads, the stress intensity factors and the energy release rate are computed numerically by extrapolation for infinitesimally small lengths of branched cracks. The results are compared with those of the isotropic case given in the literature and the effects of anisotropy are discussed. © 1989 by ASME.

DOI： 10.1115/1.3176182

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A microcrack model of dilatancy in brittle materials Reviewed

S. NEMAT-NASSER, M. OBATA

J. Appl. Mech.   55   24 - 35   1988.04

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Analysis of internal cracks around reinforcement in brittle materials Reviewed

M.OBATA, Y.GOTO, S. MATSUURA

J. Struct. Engineering, JSCE   34A   421 - 421   1988.04

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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Micromechanics of plastic flow Reviewed

S. NEMAT-NASSER, M. OBATA

Proc. 2nd Int. Conf. on Constitutive Laws for Engineering Materials   295 - 306   1987.04

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Language：English   Publishing type：Research paper (international conference proceedings)  

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Rate-dependent, finite elasto-plastic deformation of polyctystals Reviewed

S. NEMAT-NASSER, M. OBATA

Proc. Roy. Soc. Lond.   A407   343 - 375   1986.04

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On stress field near a stationary crack tip Reviewed

S. NEMAT-NASSER, M. OBATA

Mechanics of Materials   3   235 - 243   1984.04

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Language：English   Publishing type：Research paper (scientific journal)