Modified spherical cavity-expansion model for projectile penetration into concrete targets

查看全文 作　　者：[1]Y.Peng;[2,3]H.Wu;[4]Q.Fang;[4]X.Z.Kong

机构地区：[1]College of Liberal Arts and Sciences,National University of Defense Technology,Changsha 410073,China;[2]Key Laboratory of Performance Evolution and Control for Engineering Structures,Tongji University,Shanghai 200092,China;[3]Research Institute of Structural Engineering and Disaster Reduction,College of Civil Engineering,Tongji University,Shanghai 200092,China;[4]State Key Laboratory for Disaster Prevention and Mitigation of Explosion and Impact,PLA Amy Engineering University,Nanjing 210007,China

出　　处：《Acta Mechanica Sinica》索引2019年第35卷第3期,共17页

基　　金：the National Natural Science Foundations of China (Grants 51522813 and 51438003). 摘　　要：A modified spherical cavity-expansion model is developed in this paper.(1) We introduce a piecewise hyperbolic yield criterion suitable for pressure less than fc/3 to describe the mechanical behavior in the elastic region for the elastic-plastic response and modify the crack occurrence condition for the elastic-cracked-plastic response.(2) The hyperbolic yield criterion and a piecewise equation of state (EOS) are adopted for a better description of the plastic behavior of concrete material. Then, the modified model is validated by several projectile penetration tests in both the normal strength concrete (NSC) and ultra-high performance cement-based composite (UHPCC) targets. Finally, the hydrostatic pressure of the targets under rigid ogive-nosed projectile penetrations is found to be nearly within (0, 1.6 GPa), which usually exceeds the range that the shear strength-pressure test data covered. The influence of yield criterion on depth of penetration is discussed and it is recommended that the pressure should arrive at least 400 MPa in the related triaxial compression tests. 关键词：Dynamic cavity-expansion model PROJECTILE PENETRATION CONCRETE DEPTH of PENETRATION

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Modified spherical cavity-expansion model for projectile penetration into concrete targets

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