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Shear in Flexure of Fiber Composites with Different End Supports

K.A. Eckrote1, C.J. Burstone2, M.A. Freilich3, G.E. Messer4, and A.J. Goldberg1,*,3

1 Center for Biomaterials, MC-1615,
2 Department of Orthodontics,
3 Department of Prosthodontics and Operative Dentistry, 1-4School of Dental Medicine,
University of Connecticut Health Center, Farmington, CT 06030;



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  		Figure 1. Schematic of restrained-end test apparatus showing adjustable supports to accommodate various span lengths. The test sample is restrained by a bar with two screws at each support.

 


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  		Figure 2. Comparison of experimental rigidity values with the three analytical models. Error bars for the experimental values indicate standard deviations of the calculated means (n = 3). (A) Restrained-end loading. (B) Three-point loading.

 


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  		Figure 3. Experimental load values at the elastic limit for restrained-end loading ({blacksquare}) and three-point loading ({blacklozenge}). Error bars indicate standard deviations of the calculated means (n = 3).

 


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  		Figure 4. Contribution of shear (solid lines) and flexure (dashed lines) to the total deflection. Contributions are shown for both restrained-end loading (gray lines) and three-point loading (black lines).

 




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