Dynamics of impact force and impact-induced fracture of PMMA plates by Lamb wave analysis (original) (raw)

Elsevier eBooks, 2000

Abstract

Abstract Using Lamb wave analysis, the impact dynamcis and resultant fracture of a circular 3-mm-thick polymethylmethacrylate (PMMA) plate subjected to transverse ball impact at up to 23 m/s were studied. The time history of the impact force was estimated by deconvolution analysis and waveform synthesis of the Lamb waves. The estimated force history for low velocity was consistent with the output of a piezoelectric film, which measured the force duration directly. The dynamics of local fracture in a plate hit by a ball impact were analyzed by waveform simulation of the fracture-induced acoustic emission. A 22-mm-long crack generated by a 21-m/s impact on a plate with a slit was modeled.

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