Structural Response of Free-free Beam under Oblique Reverse Ballistic Impact

Reverse ballistic impact test has been widely used to research the materials and structural dynamic response, in which the measuring devices can be installed on the free-free beam to obtain the more accurate measured results. The 20° reverse ballistic oblique impact tests of free-free beam are carried out, and the digital image correlation (DIC) technique is used to measure the real-time dynamic response. The failure criterion is introduced and the simulated results are considered to solve the dynamic responses of free-free beam under axial and transverse impact loading. The results show that the calcula-ted bending shape agrees well with the experimental result, and is better than that in Ref[4]. The reverse ballistics is equivalent to the forward ballistics for the reverse ballistic mass ratio m_γ≥10. The proposed method can also be used for solving the dynamic response of projectile during penetration.