000004704 001__ 4704
000004704 005__ 20141119144546.0
000004704 04107 $$aeng
000004704 046__ $$k2002-06-02
000004704 100__ $$aNakash, Ronen
000004704 24500 $$aEFFECT OF MORPHOLOGY ON THE MECHANICAL BEHAVIOR OF HETEROGENEOUS NONISOTROPIC MICROBEAMS

000004704 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004704 260__ $$bColumbia University in the City of New York
000004704 506__ $$arestricted
000004704 520__ $$2eng$$aIn many microstructures, the size of the subelement (grain, chain bundles, fillers), is not negligible as compared with the overall scale (thickness, length) and the random morphology is expected to cause an inherent statistical dispersion of the structural response, and even affect the average structural behavior. These features have a direct influence on both the design and reliability of the microsystem. In this work, we study the effects of microstructure morphology characteristics such as grain size, shape, location, modulus and statistical correlations on the generalized displacements of statically determinate beams, frequently used in MEMS. The analysis includes nonisotropic material tension-shear coupling, and its relation to structural coupling, such as tensile-bending-torsion deformations. Generalizing previous studies of isotropic heterogeneity, the beams in this analysis are made of random nonisotropic elastic elements, including heterogeneity inside the cross section. Although the beams are externally determinate, the nonisotropic behavior imposes additional internal compatibility (indeterminacy) degrees of freedom, which cannot be neglected. Timoshenko deflections and statistical homogeneity assumptions are used. We assume cross-sectional linear and parabolic functions for the normal and shear strains, respectively, for which a (3x3) compliance matrix is defined with 3 independent material constants, modeling nonisotropic crystals.

000004704 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004704 653__ $$a

000004704 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004704 720__ $$aNakash, Ronen$$iAltus, Eli
000004704 8560_ $$ffischerc@itam.cas.cz
000004704 8564_ $$s114583$$uhttps://invenio.itam.cas.cz/record/4704/files/202.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004704 962__ $$r4594
000004704 980__ $$aPAPER