Modeling initial strain distribution in soft tissues with application to arteries
2006 (English)In: Biomechanics and Modeling in Mechanobiology, ISSN 1617-7959, E-ISSN 1617-7940, Vol. 5, no 1, 27-38 p.Article in journal (Refereed) Published
A general theory for computing and identifying the stress field in a residually stressed tissue is presented in this paper. The theory is based on the assumption that a stress free state is obtained by letting each point deform independently of its adjacent points. This local unloading represents an initial strain, and can be described by a tangent map. When experimental data is at hand in a specific situation, the initial strain field may be identified by stating a nonlinear minimization problem where this data is fitted to its corresponding model response. To illustrate the potential of such a method for identifying initial strain fields, the application to an in vivo pressure–radius measurement for a human aorta is presented. The result shows that the initial strain is inconsistent with the strain obtained with the opening-angle-method. This indicates that the opening-angle-method has a too restrictive residual strain parameterization, in this case.
Place, publisher, year, edition, pages
2006. Vol. 5, no 1, 27-38 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-14331DOI: 10.1007/s10237-005-0008-8OAI: oai:DiVA.org:liu-14331DiVA: diva2:23258