Theoretical and experimental evaluation of the bond strength under peeling loads

Article Abstract:

An acoustic emission and acousto-ultrasonic technique was used to investigate the strength of bonded joints subjected to peeling stress loads. The stress distribution in single lap joints was determined using a strength of materials method and finite element analysis. Results have shown that the maximum shear and peel stresses appear at the edge ends of the overlap. Moreover, a central symmetric void has a negligible effect on the peak peel and shear stresses for certain adhesive and adherend geometries and properties.

Usage, Strength of materials, Strength (Materials), Shear (Mechanics), Finite element method

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Stress intensity factors for multiple cracks in an adhesively bonded sandwich sheet

Article Abstract:

A new technique for analyzing the stress intensity factors of multiple cracks in an adhesively bonded sandwich structure is discussed. The technique uses a basic single crack solution to derive the Fredholm integral equations and compatibility equations governing the structure's stress free conditions. Theseequations are then solved simultaneously to obtain the stress intensity factors. Results show that the stress intensity factors of multiple cracks in asandwich sheet is slightly larger than that of a single crack.

Materials, Dynamic testing (Materials)

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