Modeling and simulation of the probe tip based nanochannel scratching |
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| Affiliation: | 1. Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300072, China;2. School of Engineering, University of Warwick, Coventry CV4 7AL, UK;1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084,China;2. Mechanical & Power Engineering College, Harbin University of Science and Technology, Harbin 150001, China;3. School of Mechanical and Electronic Engineering, Harbin Engineering University, Harbin 150001, China;1. Department Structure and Nano-/Micromechanics of Materials; Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany;1. Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, PR China;2. Center for Precision Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, PR China;1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;2. Key Laboratory of High-Efficiency and Clean Mechanical Manufacture at Shandong University, Ministry of Education, Jinan 250061, China |
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| Abstract: | This paper presents the theoretical modeling and numerical simulation of the probe tip based nanochannel scratching. According to the scratching depth, the probe tip is modeled as a spherical capped conical tip or a spherical capped regular three side pyramid tip to calculate the normal force needed for the nanochannel scratching. In order to further investigate the impact of scratching speed, scratching depth and scratching direction on the scratching process, the scratching simulation is implemented in LS-DYNA software, and a mesh-less method called smooth particle hydrodynamics (SPH) is used for the sample construction. Based on the theoretical and simulated analyses, the increase of the scratching speed, the scratching depth and the face angle will result in an increase in the normal force. At the same scratching depth, the normal forces of the spherical capped regular three side pyramid tip model are different in different scratching directions, which are in agreement with the theoretical calculations in the d3 and d4 directions. Moreover, the errors between the theoretical and simulated normal forces increase as the face angle increases. |
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| Keywords: | Tip modeling Nanochannel scratching SPH Normal force |
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