The influence of strain rate on the cavitation time and deformation of an underwater impulsively rectangular plate. (February 2022)

• Record Type: Journal Article
• Authors: Ramezannejad Azarboni, Habib; Darvizeh, Abolfazl
• Is Part Of: Journal of strain analysis for engineering design. Volume 57:Number 2(2022)
• Page Start: 155
• Page End: 164
• Publication Date: 2022-02
• Subjects: Underwater impulsive loading -- rectangular plate -- strain rate sensitivity -- cavitation time -- yield time -- Cowper-Symond constitutive equation; Strains and stresses -- Periodicals; Strain gages -- Periodicals; 624.176
• DOI: 10.1177/03093247211020840
• Languages: English
• ISSNs: 0309-3247

Abstract

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.