1.College of Field Engineering,Army Engineering University of PLA,Nanjing 210007,China；
2.Northwest Institute of Nuclear Technology，Xi'an 710024,China
Abstract：Combining field tests and numerical simulations, influences of initial conditions on damage and failure effect of steel square tubes under lateral local explosion loading were studied. Q235 steel square tubes with 3 kinds of wall thickness including 3mm, 3.5mm and 4mm and each cross-section width of 100mm were set in an explosion field produced by 160g TNT explosive to conduct impact tests. Influences of charge’s scaled distance Z and width-thickness ratio W of square tube on important damage deformation feature parameters, such as, center deflection of tube’s exploding surface, radial width and axial length of depression deformation zone etc. were analyzed. Numerical simulations for deformation and failure process of square tubes were done with the dynamic finite element program LS-DYNA and the fluid-solid coupled algorithm. The calculated results agreed well with test phenomena. Based on strain-time curves of tube’s key nodes, deformation’s different stages of tube exploding surface’s center point and right vertex of tube’s cross-section were analyzed. The study provided an important scientific basis for structural design and engineering protection calculation of steel square tubes.
余洋1，纪冲1，周游2，龙源1，谢兴博1. 侧向局部爆炸荷载下钢质方管的损伤破坏及影响因素研究[J]. 振动与冲击, 2018, 37(15): 191-198.
YU Yang1,JI Chong1,ZHOU You2,LONG Yuan1,XIE Xingbo1. Damage and failure of steel square tubes under lateral local explosion loading and their influencing factors. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(15): 191-198.
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