TY JOUR TI ASSESSMENT OF THE APPLICABILITY OF A DISK SAMPLE FOR TESTING THE STRENGTH OF MATERIALS KW deformation KW stiffness KW test KW stress concentrator KW stress state KW sample JO Modern Technologies and Scientific and Technological Progress AU Cherepanov, A.P. PY 2025 IS 2025 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»