Title: Numerical and experimental study on bi-directional deformations of cantilevers by overlapping laser shock micro-adjustment technology

Authors: Xiao Wang; Chunxing Gu; Zongbao Shen; Huixia Liu

Addresses: School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China ' School of Mechanical Engineering, Shanghai Jiao tong University Shanghai, 200240, China ' School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China ' School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China

Abstract: This work demonstrates that the overlapping laser shock micro-adjustment technology can be used to adjust the bending curvature and the tilt angle of a micro-cantilever. To illustrate the transient bi-directional deformation behaviours, the forming process is simulated by using a fully three-dimensional (3D) finite element model, wherein, some numerical results are validated by the experimental data. To characterise the bi-directional deformation precisely, the micro-cantilevers are scanned prior to and after adjustment by using the non-contact 3D measuring system and the obtained point cloud data is compared with the computer-aided design model. The research results show that the time interval, scan direction and the number of impacts have an important effect upon the bi-directional deformation. In addition, the multiple overlapping laser shock micro-adjustment technology may have the potential to be a competitive means to form curved surfaces.

Keywords: forming; overlapping laser shock micro-adjustment; bending curvature; tilt angle; micro-cantilevers; bi-directional deformation; cantilevers; simulation; finite element method; FEM; 3D modelling; point cloud data; CAD; computer-aided design; curved surfaces.

DOI: 10.1504/IJMPT.2015.070092

International Journal of Materials and Product Technology, 2015 Vol.51 No.1, pp.60 - 74

Accepted: 08 Mar 2015
Published online: 26 Jun 2015 *

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