A bimaterial structure composed of two elastic plates bonded together by an interface with a normal (transverse) crack in the first plate and subjected to monotonically temperature and tension loading is considered. The interface is assumed to exhibit brittle failure at critical shear stress value or progressive damage in a cohesive zone preceding delamination. Using modified Shear lag model, the analytical solution is provided specifying the length of debonding. The critical lengths of a partial debonding along the interface are calculated and the limit value of temperature at full debonding is obtained. The analytical predictions are compared with experimental data and numerical results of Lemaitre and Song. The comparison shows a good agreement and proves the validity of the model used.
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.
The paper deals with the interface behavior of a smart patch/layer lightweight structure subjected to combined time harmonic mechanical loading, electric field and environmental conditions. The applied dynamic shear-lag and Fourier method refer to the overlap zone of the considered structure. It gives a possibility to obtain solutions in a closed form for axial and shear stresses of the structure. The types of solutions obtained depend mainly on the adherends' thickness, the frequency interval of applied dynamic loading and the shear modulus of the used adhesive. At a given constant ratio of thicknesses of the adherends, the frequency interval of the dynamic load can change drastically the type of solution of the considered system of ordinary differential equations.Theoretical predictions for single debond length of patch/layer structure at an elastic-brittle interface behavior are provided. The influence of the ratio of thicknesses of the adherends in PZT-5H/CFRP patch/layer structure and the frequency range of applied dynamic mechanical loading on the interface delamination is investigated. All results are illustrated in figures and tables and are discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.