Three-point bending Young's modulus of nanowires

The three-point bending Young's modulus (E) of nanowires was studied by a finite element method. It was found that the constraint conditions at the nanowire ends, the ratio of the suspended length of the wire to the wire diameter and the deflection of the wire all work together to contribute to the measurement errors of the Young's modulus. Yielding of the deposited material used to fix the nanowire ends leads to a decrease in the slope of the load-deflection curve. The three-point bending criteria for nanowires have been established. A modified equation for the measurement of the three- point bending Young's modulus of nanowires is proposed.