Finite element simulation of deformation processes of micro-components

  • W. M. Gao
  • L. X. Kong
  • P. D. Hodgson


The aim of this paper is to improve the understanding of deformation of micro medical needle and thread during assembly and then to develop an economical and flexible deformation method. Therefore, the swaging process is computationally simulated with the finite element method in this paper. A commercially available explicit nonlinear finite element analysis code, LS-Dyna, is used to model the 3-D deformation and contact problem. As the firmness of the assembly on the needle depends on the contact force and friction, the contact and the slide between the needle and thread are taken into account in the simulation. The general surface-to-surface contact algorithm (STS) is used to simulate the contact. The paper provides an insight into the deformation of the micro products.


Assembly Micro medical needle Thread Finite element method 


  1. [1]
    Dynel PTY LTD, Dynek Sutures Global, (2006).Google Scholar
  2. [2]
    Ethicon Inc., Control system for an automatic needle-Suture assembly and packaging machine, US 19980019138–19980206 (1998).Google Scholar
  3. [3]
    Ethicon Inc., Automatic surgical needle and suture loading machine, US6014851 (2000).Google Scholar
  4. [4]
    Ethicon Inc., System for needle thread putting and swaging, US 19940181598 19940113 (1994)Google Scholar
  5. [5]
    Y. Ansel, F. Schmitz, S. Kunz, H. P. Gruber, and G. Popovic, 2002, Development of tools for handling and assembling micro-components,Journal of Micromechanics and Microengineering. 12 (2002) 430–437.CrossRefGoogle Scholar
  6. [6]
    B. Michel, J.-P. Sommer, V. Groβer: Application of fracture mechanics to micromechanics and micro system technology,Advances in Fracture Research and Structural Integrity, ed. V. V. Panasyuk et. al., Pergamon Press (1994) 683–690.Google Scholar
  7. [7]
    K. Tsui, A. A. Geisberger, M. Ellis, G. D. Skidmore, Micro-machined end-effector and techniques for directed MEMS assembly,J. Micromech. Microeng. 14 (2004) 542–549.CrossRefGoogle Scholar
  8. [8]
    O. Nagler, M. Trost, B. Hillerich, F. Kozlowski, Efficient design and optimization of MEMS by integrating commercial simulation tools,Sensors and Actuators. A66 (1998) 15–20.CrossRefGoogle Scholar
  9. [9]
    Ansys Inc., ANSYS LS-DYNA User’s Guide, (1997)Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2007

Authors and Affiliations

  1. 1.Centre for Material and Fibre InnovationDeakin UniversityGeelongAustralia

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