Abstract
In the micromechanical analysis of composite materials, the objective is to predict the overall behavior of the composite from known properties of its individual constituents. When applied to fibrous composites, stress distributions in a composite material subjected to applied stresses can be modelled using inhomogeneity-matrix systems in which the fibers are represented by inhomogeneities embedded in a foreign matrix material. One of the most important challenges associated with inhomogeneity-matrix systems is concerned with the design of inhomogeneities in which the interior strain distribution remains uniform. The primary motivation for the interest in this class of problems lies in the optimal nature of an interior uniform strain field in that such a field does not give rise to stress peaks within the inhomogeneity and also effectively reduces the stress concentration in the surrounding matrix (it is well known that stress peaks are usually responsible for the mechanical failure of the inhomogeneity-matrix system). The main focus in addressing this challenge has been on designing the shape of the inhomogeneity and the properties of the material interface between the inhomogeneity and its surrounding matrix to achieve the desired uniform strain distribution inside the inhomogeneity. In the emerging area of nanocomposites, however, the presence of appreciable interface energy (known also as the “interface effect”) presents formidable challenges in the design of corresponding nano-inhomogeneities with uniform internal strain distributions. In this chapter, we present some new results in this area for anti-plane shear deformations of composite solids. In particular, we demonstrate the existence of a single nano-inhomogeneity with uniform internal strain distribution induced by a screw dislocation as well as that of periodic nano-inhomogeneities with uniform internal strain distributions when the composite is subjected to uniform remote (anti-plane shear) loading. Our method involves the identification of the corresponding unknown shape of the desired inhomogeneity via a conformal mapping whose unknown coefficients are determined from a system of nonlinear equations. Extensive numerical examples are given to verify the correctness of our method and to illustrate the size dependence of the shapes of the inhomogeneities. It is anticipated that these results will find extensive application in the optimal design of fibrous nanocomposites.
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References
Ammari, H., Capdeboscq, Y., Kang, H., Lee, H., Milton, G.W., Zribi, H.: Progress on the strong Eshelby’s conjecture and extremal structures for the elastic moment tensor. J. Math. Pure Appl. 94, 93–106 (2010)
Cherepanov, G.P.: Inverse problems of the plane theory of elasticity. J. Appl. Math. Mech. 38, 915–931 (1974)
Dai, M., Ru, C.Q., Gao, C.F.: Uniform strain fields inside multiple inclusions in an elastic infinite plane under anti-plane shear. Math. Mech. Solids. 22, 114–128 (2017)
Dai, M., Gao, C.F., Ru, C.Q.: Uniform stress fields inside multiple inclusions in an elastic infinite plane under plane deformation. Proc. R. Soc. A. 471, 20140933 (2015a)
Dai, M., Ru, C.Q., Gao, C.F.: Non-elliptical inclusions that achieve uniform internal strain fields in an elastic half-plane. Acta Mech. 226, 3845–3863 (2015b)
Dai, M., Gao, C.F.: Non-circular nano-inclusions with interface effects that achieve uniform internal strain fields in an elastic plane under anti-plane shear. Arch. Appl. Mech. 86, 1295–1309 (2016)
Dai, M., Schiavone, P., Gao, C.F.: Periodic inclusions with uniform internal hydrostatic stress in an infinite elastic plane. Z. Angew. Math. Mech. 96, 1374–1380 (2016a)
Dai, M., Schiavone, P., Gao, C.F.: Nano-inclusion with uniform internal strain induced by a screw dislocation. Arch. Mech. 68, 243–257 (2016b)
Dai, M., Schiavone, P., Gao, C.F.: Uniform strain fields inside periodic inclusions incorporating interface effects in anti-plane shear. Acta Mech. 227, 2795–2803 (2016c)
Eshelby, J.D.: The determination of the elastic field of an ellipsoidal inclusion and related problems. Proc. R. Soc. Lond. A. 241, 376–396 (1957)
Eshelby, J.D.: Elastic inclusions and inhomogeneities. Prog. Solid Mech. 2, 87–140 (1961)
Fang, Q.H., Liu, Y.W.: Size-dependent elastic interaction of a screw dislocation with a circular nano-inhomogeneity incorporating interface stress. Scr. Mater. 55, 99–102 (2006)
Grabovsky, Y., Kohn, R.V.: Microstructures minimizing the energy of a two phase elastic composite in two space dimensions. II: the Vigdergauz microstructure. J. Mech. Phys. Solids. 43, 949–972 (1995)
Gurtin, M.E., Murdoch, A.I.: A continuum theory of elastic material surfaces. Arch. Ration. Mech. Anal. 57, 291–323 (1975)
Gurtin, M.E., Weissmüller, J., Larche, F.: A general theory of curved deformable interfaces in solids at equilibrium. Philos. Mag. A. 78, 1093–1109 (1998)
Horgan, C.O.: Anti-plane shear deformations in linear and nonlinear solid mechanics. SIAM Rev. 37, 53–81 (1995)
Josell, D., Bonevich, J.E., Shao, I., Cammarata, R.C.: Measuring the interface stress: Silver/nickel interfaces. J. Mater. Res. 14, 4358–4365 (1999)
Kang, H., Milton, G.W.: Solutions to the Pólya–Szegö conjecture and the weak Eshelby conjecture. Arch. Ration. Mech. Anal. 188, 93–116 (2008)
Kang, H., Kim, E., Milton, G.W.: Inclusion pairs satisfying Eshelby's uniformity property. SIAM J. Appl. Math. 69, 577–595 (2008)
Liu, L., James, R.D., Leo, P.H.: Periodic inclusion—matrix microstructures with constant field inclusions. Metall. Mater. Trans. A. 38, 781–787 (2007)
Liu, L.P.: Solutions to the Eshelby conjectures. Proc. R. Soc. Lond. A. 464, 573–594 (2008)
Luo, J., Wang, X.: On the anti-plane shear of an elliptic nano inhomogeneity. Eur. J. Mech. A/Solids. 28, 926–934 (2009)
Markenscoff, X.: On the shape of the Eshelby inclusions. J. Elasticity. 49, 163–166 (1997)
Miller, R.E., Shenoy, V.B.: Size-dependent elastic properties of nanosized structural elements. Nanotechnology. 11, 139–147 (2000)
Mura, T., Shodja, H.M., Lin, T.Y., Safadi, A., Makkawy, A.: The determination of the elastic field of a pentagonal star shaped inclusion. Bull. Tech. Univ. Istanbul. 47, 267–280 (1994)
Mura, T.: The determination of the elastic field of a polygonal star shaped inclusion. Mech. Res. Commun. 24, 473–482 (1997)
Muskhelishvili, N.I.: Some Basic Problems of the Mathematical Theory of Elasticity. Noordhoff, Groningen (1975)
Rodin, G.: Eshelby’s inclusion problem for polygons and polyhedra. J. Mech. Phys. Solids. 44, 1977–1995 (1996)
Ru, C.Q., Schiavone, P.: On the elliptic inclusion in anti-plane shear. Math. Mech. Solids. 1, 327–333 (1996)
Ruud, J.A., Witvrouw, A., Spaepen, F.: Bulk and interface stresses in silver-nickel multilayered thin films. J. Appl. Phys. 74, 2517–2523 (1993)
Sendeckyj, G.P.: Elastic inclusion problems in plane elastostatics. Int. J. Solids Struct. 6, 1535–1543 (1970)
Sharma, P., Ganti, S., Bhate, N.: Effect of surfaces on the size-dependent elastic state of nano-inhomogeneities. Appl. Phys. Lett. 82, 535–537 (2003)
Sharma, P., Ganti, S.: Size-dependent Eshelby’s tensor for embedded nano-inclusions incorporating surface/interface energies. ASME J. Appl. Mech. 71, 663–671 (2004)
Shenoy, V.B.: Atomistic calculations of elastic properties of metallic fcc crystal surfaces. Phys. Rev. B. 71, 094104 (2005)
Tian, L., Rajapakse, R.: Elastic field of an isotropic matrix with a nanoscale elliptical inhomogeneity. Int. J. Solids Struct. 44, 7988–8005 (2007a)
Tian, L., Rajapakse, R.: Analytical solution for size-dependent elastic field of a nanoscale circular inhomogeneity. ASME J. Appl. Mech. 74, 568–574 (2007b)
Vigdergauz, S.: Two-dimensional grained composites of extreme rigidity. ASME J. Appl. Mech. 61, 390–394 (1994)
Wang, X.: Uniform fields inside two non-elliptical inclusions. Math. Mech. Solids. 17, 736–761 (2012)
Wang, X., Schiavone, P.: Two inhomogeneities of irregular shape with internal uniform stress fields interacting with a screw dislocation. C. R. Mec. 344, 532–538 (2016)
Acknowledgments
Dai appreciates the support of the China Scholarship Council. Schiavone thanks the Natural Sciences and Engineering Research Council of Canada for their support through a Discovery Grant (Grant # RGPIN 155112).
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Dai, M., Schiavone, P. (2018). The Design of Nano-Inhomogeneities with Uniform Internal Strain in Anti-Plane Shear Deformations of Composite Solids. In: Meguid, S., Weng, G. (eds) Micromechanics and Nanomechanics of Composite Solids. Springer, Cham. https://doi.org/10.1007/978-3-319-52794-9_6
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