130 メゾ粒子界面のすべり/はく離を考慮した材料構成モデル

概要

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The interfacial decohesion is a typical damage mechanism of particle-dispersed composite materials. The phenomena of interfacial damage include generally the sliding along the tangential direction at the interface between the matrix and inclusion, and delamination in the direction normal to the interface. Effects of both sliding and delamination are modeled in terms of the local stress and displacement fields. The equivalent inclusion method is employed to establish the constitutive model of the composite. Since there exists a displacement jump across the interface, which may cause an additional strain to the strain field, the equivalency between the real particles and the virtual inclusion is similar to but more complicated than the conventional approach in coping with the perfectly bonded composites. Also, a treatment is developed to constrain the overlapping problem. Numerical analysis is carried out. Both sliding and delamination give detrimental effects on the overall properties of composite. The strong detrimental effect caused by sliding on the shear moduli of composites is also revealed.
一般社団法人日本機械学会の論文
2002-10-10