Shear stresses in a stepped bonded repair of a laminate

摘要

This paper presents a simplified model for the determination of the shear stress distribution inside a stepped repair of a thin laminated structure. The shear stresses are derived concerning the special material properties of a laminate likenon-isotropic material behaviour, differences of the material properties in thickness direction etc. Assuming the laps to be a quasi-homogeneous structure, the bond-line is treated as inhomogeneity, which transfers the load via shear stresses from parentlaminate into patch and vice versa. The shear stresses in radial and tangential direction and also in-plane shear stresses are derived with help of the proposed model. The model allows a straightforward calculation of the stress distribution without muchcalculation effort. The efficiency of the model is shown by comparison of example calculations with FE-calculations performed with the FE-system ANSYS.