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Information × Registration Number 0214U006598, 0113U000783 , R & D reports Title Development of technology for determination of stress gradient over the surface in structural welding elements using ESPI-HD method popup.stage_title Head Savitsky Viktor Volodymyrovych, Кандидат технічних наук Registration Date 07-04-2016 Organization E.O.Paton Electric Welding Institute of the National of Sciences of Ukraine popup.description2 Residual stresses (RS) that occur at the elements of constructions during their welding is one of the important factors that affect their reliability and efficiency. Determination of residual stress using experimental techniques considers that RS on the basis of measurement are constant. But there is a significant gradient of stresses in the area of the weld seam and the heat affected zone. The objects of study are the technology, method and equipment for determination of residual stresses in the welded constructions. The aim of the project is to create a methodology for residual stresses determination in structural elements on the basis of an electron speckle- interferometry method in conjunction with the hole-drilling method. Reliable information about the distribution of RS in structural elements will optimize the manufacturing process of welding to reduce the level of stress state, leading to increased efficiency and reliability of welded structures. The aim of the project was achieved by: creating methods of calculation and experimental evaluation of the influence stress gradient on the results of stress state investigation by ESPI-HD method, the development of algorithms for determination of residual stresses and their gradients thru the surface and the depth.5481 Product Description popup.authors Гончаров Павло Васильович Савицький Віктор Володимирович popup.nrat_date 2020-04-02 Close