Determination of Residual Stresses in Structural Elements Using Electron Speckle Interferometry Method
Electron speckle-interferometry can be used in combination with hole drilling for an accurate determination of residual stresses (ESPI-HD method).Technology and compact equipment for efficient measurement of residual stresses based on ESPI-HD method have been described.The computation method for calculation the values of stress tensor components based on surface displacements data has been suggested.Use of the ESPI-HD method allows increasing the accuracy of residual stress determination.High sensitivity of the instrumentation allows conducting investigations of the stressed state on a small base (0.5 mm) without loss of the experiment accuracy.A special new approach to the conventional method of speckle-interferometry in order to investigate stress gradients over the surface of the test object has been added.The efficiency of application of the offered procedure for evaluation of the gradient of stresses is shown for investigation of residual stresses in welded structures.
residual stresses electron speckle-inteferometry hole-drilling method welding
Leonid Lobanov Vyacheslav Pivtorak Viktor Savitsky Galina Tkachuk
E.O.Paton Electric Welding Institute,Kyiv,Ukraine
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）