205 On the delamination problem of particle-dispersed composite with equivalent inclusion method

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The composite materials are deemed to be the most favorable candidate materials of many engineering structures due to their superior specific characteristics in strength, stiffness, costs, and weight, etc, in the regime of high temperatures, and/or other severe environmental conditions. At the same time it has been revealed that the composite materials are susceptible to interface delamination, which may be caused by thermal/mechanical impact, and/or fatigue loading. The properties of composites will significantly degrade when the interface between the matrix and the particles undergoes delamination. The effects of delamination on the properties of composites are evaluated by developing a self-consistent constitutive model that utilizes the Eshelby's equivalent inclusion method, modeling the interfacial degrading phenomena on the effect of the composite. By modeling the delamination with a spring layer and making equivalence of stress and strain of particles to those of a virtual inclusion, an averaged Eshelby tensor is derived explicitly. The additional strain caused by the displacement jump at the interface can be expressed in terms of either external loading or eigenstrain, by employing two corresponding tensors. These tensors can conveniently be incorporated into the constitutive model, and make it available to assess the effects of delamination. The details of the modeling and the effects of the interfacial behavior will be discussed with some numerical results.
一般社団法人日本機械学会の論文
2002-03-11

205 On the delamination problem of particle-dispersed composite with equivalent inclusion method

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