|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Materials through High Resolution Coherent Imaging
||Photoelastic Ptychography: A New Approach for Quantitative Stress Determination
||Guido Cadenazzi, Keith Nugent, Nicholas Anthony, Brian Abbey
|On-Site Speaker (Planned)
We present an experimental study of the elastic properties of materials explored through photoelastic ptychography. This work is an extension of a recent simulation study by Ferrand et al (Opt. Lett. 40, 5144-5147 (2015)). The circular polariscope in combination with holographic photoelasticity allows the sum and difference of principal stress components to be determined. Phase stepping and interferometric techniques have been proposed as a method for separating the in-plane stress components in two-dimensional photoelasticity experiments. Here we describe a new experimental approach to the problem of quantifying stress and birefringence in transparent samples based on photoelastic ptychography. The quantitative birefringent information provides a direct window into the samples’ mechanical properties which can then be used, e.g. for predictive modelling. We have validated our results against a well-studied engineering problem, the diametrically compressed disc. The analysis of this sample as well as several others of biological significance will be discussed.
||Planned: Supplemental Proceedings volume