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Method and system for direct strain imaging

  • US 9,311,566 B2
  • Filed: 08/02/2013
  • Issued: 04/12/2016
  • Est. Priority Date: 08/03/2012
  • Status: Active Grant
First Claim
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1. A computer-implemented method for determining strain characteristics in a vicinity of a point of interest w={xw, yw}T in two parametric dimensions embedded in a two or three dimensional space, wherein the point of interest w is part of a deformable domain or body having a plurality of features which may be represented as a node pattern of n nodes, the method comprising:

  • receiving a first set of captured data of a plurality of features and representing the plurality of features by nodes indexed by i or j in the domain in an un-deformed configuration;

    receiving a second set of captured data of the plurality of features represented by nodes i,j in the domain in a deformed configuration;

    measuring engineering strains ei,j between a plurality of node combinations in the vicinity of w to produce ew={e21, e31, . . . e42 . . . , en(n-1)}T; and

    applying an approximation or interpolation to the engineering strains ei,j to approximate strain ε

    h in the vicinity of w.

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