Modeling the acoustic emissions generated during dynamic fracture under bending

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:203

Article

van Gemmeren, Valentin¹  Graf, Timothy¹  Dual, Jurg¹ 

[1] Swiss Fed Inst Technol, Inst Mech Syst, CH-8092 Zurich, Switzerland

关键词: Dynamic fracture;    Acoustics emissions;    Bending;    Guided waves;    Brittle;   

DOI  :  10.1016/j.ijsolstr.2020.07.012

来源: Elsevier

【 摘 要 】

We quantitatively analyze the dynamic fracture of a glass tube under bending and model the associated generation of acoustic emissions. In our experiments, precisely controlled dynamic fracture is induced by focusing flexural waves. High-speed videos show the crack propagating rapidly through 85% of the cross section, before slowing down considerably. The resulting acoustic emissions are modeled by computing the diffraction of the incident flexural waves at the traction-free crack surface. We observe that longitudinal and flexural waves are generated during the fracture process, with very good agreement between experiments and simulations. (C) 2020 The Authors. Published by Elsevier Ltd.

【 授权许可】

Free