3D full-field strain measurements in soft tissue biomechanics using optical techniques

TENDELA, LUCAS; DAVIS, FRANCES; MOLIMARD JÉRÔME ; AVRIL STÉPHANE

Londres

Seminario; BSSM seminar Celebrating 50 years of BSSM; 2014

British Society of Strain Measurement

Generally, mechanical problems are studied using two-dimensional (2D) measurements of displacement or strain fields. In the case of complex problems, however (non-planar loading, complex geometries, or heterogeneous structures), surface analysis can be insufficient. To explain the phenomena entirely full three-dimensional (3D) fields of displacement, strain, and/or stress are often needed. In this work, we present a new approach to study the strain profile in soft tissues (i.e. arteries, muscle, skin) based on the Digital Volume Correlation (DVC) technique. To show how the proposed technique could be implemented, we quantified the heterogeneous strain distribution in the human ascending thoracic aortic aneurysm (ATAA) at various levels of pressure.