Simulating the Swelling and Deformation Behaviour in Soft Tissues Using a Convective Thermal Analogy

Details

• Personal Author:
  Herzog W ; Wu, John Z.
• Description:
  It is generally accepted that cartilage adaptation and degeneration are mechanically mediated. Investigating the swelling behaviour of cartilage is important because the stress and strain state of cartilage is associated with the swelling and deformation behaviour. It is well accepted that the swelling of soft tissues is associated with mechanical, chemical, and electrical events. The purpose of the present study was to implement the triphasic theory into a commercial finite element tool (ABAQUS) to solve practical problems in cartilage mechanics. Because of the mathematical identity between thermal and mass diffusion processes, the triphasic model was transferred into a convective thermal diffusion process in the commercial finite element software. The problem was solved using an iterative procedure. The proposed approach was validated using the one-dimensional numerical solutions and the experimental results of confined compression of articular cartilage described in the literature. The time-history of the force response of a cartilage specimen in confined compression, which was subjected to swelling caused by a sudden change of saline concentration, was predicted using the proposed approach and compared with the published experimental data. The advantage of the proposed thermal analogy technique over previous studies is that it accounts for the convective diffusion of ion concentrations and the Donnan osmotic pressure in the interstitial fluid. [Description provided by NIOSH]
• Subjects:
  Cumulative Trauma Disorders Musculoskeletal System Occupational Health Safety
• Keywords:
  Cumulative-trauma Diffusion-analysis Mathematical-models Models Musculoskeletal-system Repetitive-work Simulation-methods Stress
• ISSN:
  1475-925X
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-8
• Volume:
  1
• Issue:
  1
• NIOSHTIC Number:
  nn:20024142
• Citation:
  Biomed Eng Online 2002 Dec; 1(1):1-8
• Email:
  walter@kin.ucalgary.ca
• Federal Fiscal Year:
  2003
• NORA Priority Area:
  Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
• Peer Reviewed:
  True
• Source Full Name:
  BioMedical Engineering Online
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:facf25f2518fcac1a8e25f1297072995530613641e54b33fb6f3e4862c83dce68fb429bf1a31c8da9e5b448e62dcbfbddb9a5dd794eb972332b90d5bff37d888
• Download URL:
  https://stacks.cdc.gov/view/cdc/196108/cdc_196108_DS1.pdf
• File Type:
  [PDF - 1.41 MB ]