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2 Journal of Theoretical and Applied Mechanics

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Cracked bi-material structure subjected to monotanically increasing thermal loading. Determination of the interfacial shear and peeling stresses

Nikolova G., Ivanova J.

Journal of Theoretical and Applied Mechanics

2015

Vol. 53 nr 4

1019--1028

A modified analytical shear lag model is used for the evaluation of the interfacial shear and peeling stresses in a cracked bi-material structure composed of two elastic plates bonded together by an interface zero thickness material and subjected to monotonically increasing thermal loading. The “peeling” stress can be determined by the aid of the interfacial shear stress and is proportional to deflections of the thinner plate of the structure. The interface is assumed to exhibit brittle failure when the shear stress reaches the critical value. The analytical solution and the length of the debonding and intact zones as well as the interfacial shear and peeling stresses for given material properties and thermal loading are discussed and illustrated in figures.

Interfacial shear and peeling stresses in a two-plate structure subjected to monotanically increasing thermal loading

Nikolova G., Ivanova J.

Journal of Theoretical and Applied Mechanics

2013

Vol. 51 nr 4

937--947

An approximate analytical model is developed for the evaluation of the interfacial shear and peeling stresses in a bi-material element composed of two elastic plates bonded together by an interface zero thickness material and subjected to monotonically increasing thermal loading. Thermal peeling stress is caused by thermal and elastic mismatch of a two-plate structure undergo a temperature change. The “peeling” stress can be determined from the evaluated interfacial shear stress and is proportional to deflections of the thinner plate of the structure, i.e. to its displacements with respect to the thicker plate. The interface is assumed to exhibit brittle failure at the critical shear stress value. The analytical solution qualitatively shows delamination and ultimate failure. The results are illustrated in figures and discussed.