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| Microbending Moment of Brass Foils Based on Strain Gradient Hardening Model |
| (1. Department of Plasticity Technology, Shanghai Jiaotong University, Shanghai 200030， China;2. Department of Mechanical and Electronic Engineering, Hebei University of Engineering,Handan 056038, Hebei, China; 3. Chair of Manufacturing Technology, University of ErlangenNuremberg, Erlangen 91058, Germany) |
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Abstract The microbending experiments of brass were investigated and there exist the obvious size effects that bending moment increases with foil thickness decreasing. The microbending moments are predicted by classical plastic theory and different strain gradient theories, which shows that the predicted results based on the modified NixGao model are very close to the experimental data and the equation of material intrinsic length is reasonable. The material intrinsic length is the function of shear modulus, initial yield strength, Burger’s vector and twins layers across the foil thickness.
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Received: 19 January 2011
Published: 30 November 2011
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