Moire interferometry and numerical techniques were used to quantitatively track the energy distribution surrounding a flaw loaded in remote shear and compression. A single central flaw was introudced mechanically to the polycarbonate material, LexancircleR(1). Independently controlled application of compression and shear boundary loads enabled ramped increases in crack-local shear. Progressive crack face deformations were measured at the onset of slip patch initiation and subsequent full crack length relative displacements. Kl and Kll singularity fields were approximated using near crack tip displacements as series expansion input. The combination of these data and techniques are used to account for energy distributions involved with the compressive shear behavior of this model material.
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