Crushing analysis and multiobjective crashworthiness optimization of tapered square tubes under oblique impact loading

► Numerical study of a class of axisymmetric thin-walled square (ATS) tubes under oblique impact. ► Multi-cell tapered (MCT) ATS tube is found the best under oblique impact. ► Parametric studies on the crash behavior of the MCT tube under oblique impact. ► A new approach to include load angle uncertainty in crashworthiness optimization. ► Multiobjective optimization of the MCT tubes both with and without load angle uncertainty.