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Publications
He, X. and Guedes Soares, C. (2025), Dynamic response of rectangular plates under repeated impacts from different impactors, Ocean Engineering, Vol. 321, 120433.
Repeated impact tests on mild steel rectangular plates are conducted using three types of impactors: a hemispherical impactor (10 mm diameter), a cylindrical impactor (20 mm diameter), and a wedged impactor. This study builds upon prior research involving the same plates under repeated impacts from a hemispherical impactor (20 mm diameter), which obtained a lower bound of impact velocity for the pseudo-shakedown phenomenon. Unlike the 20 mm hemispherical impactor, which led to pseudo-shakedown, the other three impactors in this study cause eventual fracture of the plates. A detailed comparison of the dynamic responses of the plates to repeated impacts from the four impactors is conducted. Experimental findings show that impactor’s shape and size significantly influence the dynamic response of plates before structural failure and the resulting failure mode. These findings offer valuable insights into anticipating the potential risks posed by impactors of varying shapes and sizes on ship panels exposed to repeated impacts, such as from ice.
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