Dynamic Response of Copper Plates Subjected to Underwater Impulsive Loading

Applied Sciences

Han Liu¹  Jili Rong²  Dalin Xiang²  Pengwan Chen³  Kaida Dai³  Baoqiao Guo³ 

[1] Beijing Institute of Structure and Environment Engineering, Beijing 100076, China;School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;

关键词: copper plate;    underwater impulsive loading;    non-liner dynamic deformation;    3D digital image correlation;   

DOI  :  10.3390/app9091927

来源: DOAJ

【 摘 要 】

Understanding the mechanical response and failure behaviors of thin plates under impact loading is helpful for the design and improvement of thin plate structures in practical applications. The response of a copper plate subjected to underwater impulsive loading has been studied in fluid-structure interaction (FSI) experiments. Three typical copper plates, (a) without a pre-notch, (b) with a cross-shaped pre-notch (+), and (c) with a ring-shaped pre-notch (○) were selected. A high-speed photography system recorded the full-field shape and displacement profiles of the specimens in real time. The 3D transient deformation fields’ measurements were obtained using a 3D digital image correlation (DIC) technique. Strain results from DIC and the strain gauges technique were in good agreement. A dimensionless deflection was used to analyze the effect of plate thickness and loading intensity on the deformation of the copper plates. The typical failure modes of different copper plates were identified. The test plates exhibited large ductile deformation (mode $\mathrm{I}$ ) for copper plates without a pre-notch, and large ductile deformation with local necking (mode $\mathrm{I}c$ ), splitting (mode $\mathrm{II}$ ), splitting and tearing (mode $\mathrm{II}c$ ), and fragment (mode $\mathrm{III}$ ) for the copper plate with a pre-notch.

【 授权许可】

Unknown