应变速率对水下脉冲矩形板空化时间和变形的影响

IF 1.4 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Strain Analysis for Engineering Design Pub Date : 2021-06-02 DOI:10.1177/03093247211020840

H. Ramezannejad Azarboni, A. Darvizeh

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引用次数: 1

摘要

本文分析和数值研究了应变速率对水下爆炸荷载作用下矩形钢板空化时间和弹塑性变形的影响。空化时间消除了爆炸总压力，使得空化时间对水下爆炸成形板的弹塑性变形有显著影响。考虑应变率效应，采用了低碳钢的copper - symond本构方程。利用本征函数得到了脉冲板动力响应的精确线性解，利用有限差分法得到了脉冲板动力响应的线性和非线性数值解。采用线性加工硬化，计算了加载各步骤的应力、应变、位移和速度。利用copper - symond本构方程可以在弹性或塑性条件下识别空化时间。在考虑应变速率影响的情况下，研究了电荷质量和距离对矩形板空化和随时间变化的变形和速度的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The influence of strain rate on the cavitation time and deformation of an underwater impulsively rectangular plate

The effect of strain rate on the cavitation time and elastoplastic deformation of steel rectangular plate subjected to underwater explosion load is analytically and numerically investigated in this study. At the cavitation time, the total pressure of the explosion is eliminated so that the cavitation time plays a significant role in the elastoplastic deformation of underwater explosive forming of plate. Taking into account the strain rate effect, the Cowper-Symond constitutive equation of mild steel is employed. Exact linear solution using the Eigen function and numerical linear and nonlinear solution using finite difference method (FDM) of dynamic response of impulsively plate is obtained. Implementing the linear work hardening, the stress, strain, displacement, and velocity in any steps of loading are calculated. The time of cavitation can be recognized in elastic or plastic regimes by applying the Cowper-Symond constitutive equation. Considering the strain rate influence, the effects of charge mass and standoff are investigated to occur of cavitation and time dependent deflection and velocity of a rectangular plate.

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来源期刊

Journal of Strain Analysis for Engineering Design 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Strain Analysis for Engineering Design provides a forum for work relating to the measurement and analysis of strain that is appropriate to engineering design and practice. "Since launching in 1965, The Journal of Strain Analysis has been a collegiate effort, dedicated to providing exemplary service to our authors. We welcome contributions related to analytical, experimental, and numerical techniques for the analysis and/or measurement of stress and/or strain, or studies of relevant material properties and failure modes. Our international Editorial Board contains experts in all of these fields and is keen to encourage papers on novel techniques and innovative applications." Professor Eann Patterson - University of Liverpool, UK This journal is a member of the Committee on Publication Ethics (COPE).