DIC MEASUREMENTS – A COMPARISON OF DIFFERENT METHODS TO EVALUATE THREE-DIMENSIONAL DEFORMATION STATES

• Abstract:

  More and more optical 3d deformation measurement systems are used to analyse material and component behaviour. Obvious advantages in the analyses - especially at high strain deformation states, where nonlinearity caused by material behaviour and kinematics, anisotropy or inhomogeneity plays a role - are pushing these methods. Nevertheless DIC-based systems only serve to observe surfaces of specimens or components. For the determination of a full 3d deformation state, there is a need of information about a material point behind the observed surface. Due to this fact it is only possible to get either deformation states relative to a local coordinate system of a surface element, or to determine the full 3d deformation state relative to a global coordinate system by making assumptions in thickness direction. The aim of this paper is to give a general view of how deformation states can be evaluated based on raw point coordinates.
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• Download:

  IMEKO-YSESM-2011-ea39.pdf
• DOI:

  _unreg_tc15-2011.39

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