Table of Content

Open Access


LiToTac: An Interactive-Interface Software for Finite Element Analysis of Multiple Contact Dynamics

Lei Peng1,2, Zhiqiang Feng1,2,*, Pierre Joli2, Christine Renaud2
School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
Laboratory of Mechanics and Energetics, Université Paris-Saclay, Evry, 91020, France.
* Corresponding Author: Zhi-Qiang Feng. Email: .

Computer Modeling in Engineering & Sciences 2019, 118(1), 111-137.


In order to investigate the mechanical behavior of systems with complex architecture and a large number of contacting bodies, a finite element software, named LiToTac, has been developed by using the object-oriented programming technique. This software, with an interactive graphical user interface, is able to handle highly non-linear problems including multiple contacts and large deformation. More importantly, the contact detection based on a hybrid three-stages methodology can be performed automatically, which is more efficient than the common strategies of pre-defining contact zones in commercial FEM software like ANSYS, ABAQUS, etc. In addition, the contact solver in LiToTac is portable between dynamic and quasi-static codes and can accurately solve contact coupled with friction in a reduced system. Several numerical examples are carried out to illustrate the functionality and capacity of the software package.


Finite element software, object-oriented programming, automatic contact detection, multiple contact dynamics.

Cite This Article

Peng, L., Feng, Z., Joli, P., Renaud, C. (2019). LiToTac: An Interactive-Interface Software for Finite Element Analysis of Multiple Contact Dynamics. CMES-Computer Modeling in Engineering & Sciences, 118(1), 111–137.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 2442


  • 1146


  • 0


Share Link

WeChat scan