@ARTICLE{Kossakowski_P.G._Analysis_2018, author={Kossakowski, P.G.}, volume={Vol. 64}, number={No 1}, journal={Archives of Civil Engineering}, pages={101-115}, howpublished={online}, year={2018}, publisher={WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES}, abstract={This paper deals with problems of failure mechanisms of S235JR structural steel. One of the fundamental parameters of the Gurson-Tvergaard-Needleman damage mechanics-based material model is considered in order to describe the behaviour of the material at the plastic range. The analysis was performed on the void volume fraction fF determined at failure of S235JR steel. The case of low initial stress triaxiality η = 1/3 was taken into consideration. Different from the most popular methods such as curve-fitting, the experimental method based on the digital image analysis of the fracture surface of S235JR steel is proposed in order to determine the critical parameter fF.}, type={Article}, title={Analysis of the void volume fraction for S235JR steel at failure for low initial stress triaxiality}, URL={http://journals.pan.pl/Content/115557/PDF/07_101-115_ace-2018-0007.pdf}, keywords={void volume fraction, failure, S235JR steel, Gurson-Tvergaard-Needleman material model, low stresstriaxiality}, }