Performance Sensitivity Analysis of the Mesh-Free Random Grid Method for Whole Field Strain Measurements Available to Purchase

In responding to the needs of the material characterization community, the recently developed mesh-free random grid method (MFRGM) has been exhibiting very promising characteristics of accuracy, adaptability, implementation flexibility and efficiency. In order to address the design specification of the method according to the intended application, in the present paper we are presenting a sensitivity analysis that aids into determining the effects of the experimental and computational parameters characterizing the MFRGM in terms of its performance. There are two sets of parameters that affect the performance characteristics of MFRGM for whole field strain measurement applications. The first set involves parameters associated with the characteristics of the experimental setup and the random grid applied on the specimen under measurement. The second set involves the computational characteristics of the mesh-free approximation and the solution (minimization) algorithms utilized. The performance characteristics of the MFRGM are mainly its accuracy, sensitivity, smoothing properties and efficiency. In the present paper we are presenting a classification of the first set of parameters as well as their relationship followed by the above mentioned sensitivity analysis to establish the influence trends in the performance characteristics with the intension to optimize the selection of the user controlled variables for a desired performance specification.