journal article·2022-04

On the use of digital image correlation for translaminar fracture of off-axis composite

Adel Esmaeili, Ehsan Ghane, Bijan Mohammadi

International Journal of Fracture· Volume 234· Issue 1-2
Publisher page

Abstract

The present study intends to extract mixed-mode stress intensity factors (SIFs) and T-stress in off-axis laminated composites using the digital image correlation (DIC). For the first time, a theoretical framework is developed to calculate SIFs according to change in off-axis fiber angles. The effects of DIC parameters on SIFs are investigated to achieve accurate experimental results. This paper is also set out to optimize the number of terms used in the multiparameter stress function and size of the extraction area. Moreover, T-stress is extracted using the developed formulation, as well as investigation of stability and instability of crack path in particular loading. The initial crack growth angle is determined and compared with its experimental observation. Finally, the finite element simulation is employed to carry out a comparative study, and the respective results are in good agreement.
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Research context

OpenAlex topics: Mechanical Behavior of Composites · Optical measurement and interference techniques · Vibration and Dynamic Analysis

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