SURFACE EFFECT ON NANOSIZED VOID GROWTH IN A RIGID-PERFECTLY PLASTIC MATERIAL |
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| Authors: | Tong Hui Yiheng Chen |
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| Institution: | 1. Department of Mechanical Engineering, Nigde University, Nigde 51245, Turkey;2. Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy 12180, New York, USA;1. MIT Lincoln Laboratory, Engineering Division, 244 Wood Street, Lexington, MA, 02421 USA;2. Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI, 48105 USA;1. School of Civil and Environmental Engineering, National University of Sciences & Technology, Islamabad, Pakistan;2. Department of Civil Engineering, University of Engineering and Technology Peshawar, Pakistan;3. School of Mechanical & Manufacturing Engineering, National University of Sciences & Technology, Islamabad, Pakistan;4. Department of Civil Engineering, Institute of Southern Punjab, Multan, Pakistan;1. Institute of UAV research, Northwestern Polytechnical University, 127 Youyi Xilu, Xi''an 710072, China;2. School of Aeronautics, Northwestern Polytechnical University, 127 YouyiXilu, Xi''an 710072, China;3. Department of Mechanical Engineering, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA;4. China Electronics Technology Group Corporation No. 38 Research Institute, 199 Xiangzhang Avenue, Hefei 230088, China |
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| Abstract: | The influence of the surface effect on the nanosized spherical void growth in a rigid-perfectly plastic material is analyzed and the mechanism of the nanosized void growth with high triaxiality is given. Based on the Rice and Tracey model for a macro void growth, the present model is proposed to account for the nanosized void growth under a uniform remote strain rate field with consideration on the surface effect. It is concluded that the surface effect yields an evident resistant influence on the nanosized void growth. That is, this influence decays as the void radius increases. With high triaxiality, the nanosized void growth is divided into two stages:the initial stage and the mature stage. At the first stage, the void grows slowly and the influence of surface effect is relatively weak, whereas at the second stage, the influene is significant and the void grows drastically. |
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| Keywords: | nanosized void extended variational principle void growth surface effect high triaxiality |
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