Strain analysis in glenohumeral capsule through finite element modelling

Bodapati, Vineeth

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https://hdl.handle.net/2142/105841 Copy

Description

Title

Strain analysis in glenohumeral capsule through finite element modelling

Author(s)

Bodapati, Vineeth

Issue Date

2019-07-19

Director of Research (if dissertation) or Advisor (if thesis)

Kersh, Mariana

Department of Study

Mechanical Sci & Engineering

Discipline

Mechanical Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Finite Element Modelling
• Biomechanics
• Soft Tissue Modelling

Abstract

The injury mechanics and strain distribution in the glenohumeral capsule at a particular joint angle have been studied extensively. However, there is a lack of information on the strain distributions in the capsule under complex joint angles, i.e, during the activities of daily living (ADL). To investigate the mechanical response of the capsule under the kinematics of the forward reach, a subject specific finite element model of the glenohumeral joint with the capsule was developed. Since the mechanical properties of the capsule under multiaxial loading were unknown we proposed an inverse finite elements based optimization routine to determine the material coefficients of the capsule. Several constitutive material models were evaluated to identify feasibility of convergence for the complex loading associated with physiological tasks. We established limits for the material coefficients of the Mooney-Rivlin model used to model the capsule. The Mooney-Rivlin model with the material coefficients C1 = 6, C10 = 6.5, and D1 = 0.12 converged for around 50% of the cycle. The results also suggest that the peak strain occurred on the inferior aspect of both the anterior and posterior side of the capsule. This work serves as the basis for future comparisons of material models and can be extended to other activities of daily living.

Graduation Semester

2019-08

Type of Resource

text

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http://hdl.handle.net/2142/105841

Copyright and License Information

Copyright 2019 Vineeth Bodapati

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