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A User Subroutine to be used with ABAQUS to solve Biphasic contact problems

Maag, Chase R
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1431648889

Abstract Details

2015, Master of Science, University of Toledo, Bioengineering.
ABAQUS (Dassault Systemes, Waltham, MA, USA) is a commercially available software package that is widely used to analyze all types of complex systems. This package allows performing finite element analysis on these systems to determine their responses under different loading conditions. ABAQUS has been used to perform a structural analysis of diarthrodial joints which are characterized by the presence of cartilage layers lining the opposing bony surfaces. During loading bones move relative to each other generating contact at the articular surfaces. To solve this contact problem, one needs to determine the biphasic response of the cartilage layers to the applied loads. Loads are distributed between two phases, the liquid and the solid phase. The fluid flow would be to space in the non-contacting parts of two loaded cartilage layers that are in contact, which can be defined using ABAQUS. The limitation of ABAQUS is that when these two non-contacting parts come into contact, ABAQUS does not allow fluid flow from one part to another, and continues to assume that flow is out to space. If fluid flow was not defined in these non-contacting parts (to be out to space), ABAQUS will initiate iv flow from one part to another when they come into contact. In order to solve this problem a user subroutine was developed to allow changes in the defined flow conditions for the initially non-contacting parts as they come into contact. The ABAQUS version used in the analysis is version 6.11-2. Test results were obtained for three axisymmetric models: flat ended indenter, spherical ended indenter, and an idealized glenohumeral joint contact. Results were obtained for an axial compressive displacement of 0.2 mm applied linearly over 10 seconds. Guo and Spilker developed a similar user defined contact algorithm and implemented it with COMSOL. Guo and Spilker’s results were consistent with those presented in the axisymmetric models. The idealized glenohumeral joint contact model was then expanded to three dimensions. Meng et. al. published data for the joint contact model that show similar results that of the three dimensional model in this study. The comparison between the published data and the data produced in this study prove that the subroutine developed in this study accurately redefines the flow of fluid in biphasic materials.
Mohamed Samir Hefzy (Advisor)
Vijay Goel (Committee Member)
Lesley Berhan (Committee Member)
74 p.
Biomechanics; Biomedical Engineering; Biomedical Research; Engineering

Recommended Citations

Citations

  • Maag, C. R. (2015). A User Subroutine to be used with ABAQUS to solve Biphasic contact problems [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1431648889

    APA Style (7th edition)

  • Maag, Chase. A User Subroutine to be used with ABAQUS to solve Biphasic contact problems. 2015. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1431648889.

    MLA Style (8th edition)

  • Maag, Chase. "A User Subroutine to be used with ABAQUS to solve Biphasic contact problems." Master's thesis, University of Toledo, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1431648889

    Chicago Manual of Style (17th edition)

toledo1431648889
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This open access ETD is published by University of Toledo and OhioLINK.