Issue 38

M. Lutovinov et alii, Frattura ed Integrità Strutturale, 38 (2016) 237-243; DOI: 10.3221/IGF-ESIS.38.32 242  The use of the multilinear approximation of the cyclic stress–strain curve for estimations led to better results than the use of the Ramberg–Osgood description of the cyclic stress–strain curve. Figure 3: Results of estimations carried out on bar specimen loaded non-proportionally with subsequent tension and torsion [6]. Estimations were performed with the use of cyclic stress–strain curve described by the Ramberg–Osgood expression. A CKNOWLEDGEMENTS he authors thank for the support of the research and of this contribution by the grant No. GA15-18274S of the Czech Science Foundation and by the SGS14/181/OHK2/3T/12 CTU grant. R EFERENCES [1] Ince, A., Glinka, G., Buczynski, A., Computational modeling of multiaxial elasto-plastic stress–strain response for notched components under non-proportional loading, International Journal of Fatigue, 62 (2013) 42-52 . DOI:10.1016/j.ijfatigue.2013.10.008. [2] Singh, M. N. K., Notch tip stress strain analysis in bodies subjected to non-proportional cyclic loads, PhD Thesis, University of Waterloo, Canada, (1998). [3] Moftakhar, A. Buczynski, A., Glinka, G., Calculation of elasto-plastic strains and stresses in notches under multiaxial loading, International Journal of Fracture, 70 (1995) 357-373. DOI: 10.1007/BF00032453. [4] Reinhardt, W., Moftakhar, A., Glinka, G., An Efficient Method for Calculating Multiaxial Elasto-Plastic Notch Tip Strains and Stresses under Proportional Loading, Fatigue and Fracture Mechanics, 27 (1997) 613-629. DOI: 10.1520/STP16258S. T