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Information × Registration Number 0214U007636, 0114U004316 , R & D reports Title Digital holography and digital image correlation techniques for structural material study popup.stage_title Head Muravsky Leonid, Доктор технічних наук Registration Date 25-12-2014 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 Comparative analysis of the methods of speckle metrology, namely, digital holography, electronic speckle pattern interferometry and digital speckle correlation was fulfilled. Method of digital speckle correlation with optimized fraction power filter, which allows us to foresee crack initiation in thin sheet polymer composite materials, to study inner layers of the specimens produced from diffusely scattered polymer composite materials and to determine elastic constants of composite material. Experiments realizing combined method of speckle-interferometry and digital speckle correlation were fulfilled and special software for experiment results processing was developed. Combined method for recording and reconstruction of three dimension deformation fields, which combines digital image-plane holography and Frenel digital holography with digital image correlation was developed. Specimens of composite materials, which are used in aircraft building, were chosen and prepared according to standard demands. Experiments, realizing combined method were fulfilled and software for recording of digital holograms and speckle-images and experiment results processing, were carried out. Experimental results testify the method efficiency for study of three dimension (3D) displacement and deformation fields of composite surfaces during their local deformation and mashing near round holes and other stress concentrators. Product Description popup.authors Вороняк Тарас Іванович Голинський Іван Стахович Сахарук Олександр Миколайович popup.nrat_date 2020-04-02 Close