A physico-mechanical approach to analyzing nonlinear elasticity in sewing machine conical springs Iroda Mavlonova, Lobar Nutfullaeva, Jamshid Sharipov, Furqat Ismoyilov and Sardor Sayitqulov EPJ Web Conf., 321 (2025) 01002 Published online: 10 March 2025 DOI: 10.1051/epjconf/202532101002