Monday  |  Salon 10  |  10:40 AM–11:00 AM

#15791, Finite Element Based Material Property Identification Utilizing Full-Field Deformation Measurements

A direct approach based on finite element formulation is described to determine material property distribution in a nominally heterogeneous material subject to tensile/compression loading. The formulation is developed for plane stress applications using basic theoretical constructs, resulting in a computational framework that has a matrix form [A] {E} = {R}, where the [A] matrix components are known functions of measured strain components and nodal coordinates, {R} components are known functions of body forces, applied loads and reactions and {E} components are the unknown material properties at discrete locations. For a series of material property identification procedure with measured strain components at discrete locations and various levels of random noise, results are presented to demonstrate the accuracy and noise sensitivity of the methodology.

Sreehari Rajan-Kattil   University of South Carolina
Michael Sutton   University of South Carolina
Subramani Sockalingam   University of South Carolina
Tusit Weerasooriya   U.S. Army Research Laboratory