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Prediction of Bearing Strength in Fiber Metal Laminates

Department of Aerospace Engineering, Faculty of Engineering and Applied Science, Ryerson University, 350 Victoria Street Toronto, Ontario, Canada, M5B 2K3

C. Poon

Department of Aerospace Engineering, Faculty of Engineering and Applied Science, Ryerson University, 350 Victoria Street Toronto, Ontario, Canada, M5B 2K3, c1poon{at}ryerson.ca

Z. Fawaz

Department of Aerospace Engineering, Faculty of Engineering and Applied Science, Ryerson University, 350 Victoria Street Toronto, Ontario, Canada, M5B 2K3

K. Behdinan

Department of Aerospace Engineering, Faculty of Engineering and Applied Science, Ryerson University, 350 Victoria Street Toronto, Ontario, Canada, M5B 2K3

Finite element (FE) analyses are carried out on bolt bearing testing scenarios based on data found in the literature. Both layer-by-layer and smeared property FE models are created to calculate the compressive characteristic dimension (CCD) for three GLARE variants. A novel re-definition of conventional CCD is proposed which is governed by the yield strength of aluminum. The new definition also incorporates the two-phase nature of GLARE, as well as the delamination/ buckling phenomenon for pin/bolt bearing, in a bearing failure mode. A previously unconsidered, orthotropic plate buckling analysis is also conducted in a conservative, worst case scenario sense on the laterally unsupported prepreg layers. Results of the buckling analysis suggest that the prepreg contribution to bearing strength, in a bearing failure mode, is at best negligible and joint collapse is governed by the yielding and delamination of the aluminum layers. Calculation of a CCD, based on the new yield strength definition, produced consistent values amongst all GLARE variants considered in the layer-by-layer analysis suggesting that the CCD is a property of the material alone.

Key Words: fiber metal laminates • GLARE • bearing strength • characteristic length method.

Journal of Composite Materials, Vol. 41, No. 9, 1137-1157 (2007)
DOI: 10.1177/0021998306067302


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