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Interface delamination of bi‐material structure under dynamic time harmonic loading

2010; Wiley; Volume: 91; Issue: 2 Linguagem: Inglês

10.1002/zamm.200900369

1521-4001

Jordanka Ivanova, Gergana Nikolova, Barbara Gambin,

Mechanical Behavior of Composites

Abstract The interface behaviour between two layers of 2D elastic structure under dynamic time‐harmonic load is studied. The “shear lag model” is adopted and applied to the dynamic response of bi‐material structure, assuming the elastic‐brittle behaviour of the interface. The Laplace transforms together with half‐analytical calculations are used to obtain the shear stress and elastic debond lengths along the interface at sinusoidal load. Parametric analysis of the obtained results is illustrated by an example of the modern ceramic‐metal composite, so called cermet, and depicted in figures. The influence of loading characteristics, i.e. frequencies and amplitude fluctuations on the shear stress and the value of debond length for a small interval of time, is discussed.