摘要
为了揭示造成爆炸焊接边界效应的机理,文中借助LS-DYNA软件,采用无网格的SPH法分别对复板厚度为2 mm、基板厚度为16 mm的Q235/Q235、TA2/Q235、304不锈钢/Q235复合板进行爆炸焊接边界效应的二维数值模拟.观察不同组模拟过程中的复板飞行姿态,复板撕裂均发生在与基板碰撞之前.当基板保持一致,炸药分别为乳化炸药与膨化铵油混合炸药,复板为TA2时均比复板为Q235钢以及304不锈钢的撕裂尺寸更大;当基板、复板均为Q235钢,乳化炸药条件下比膨化铵油混合炸药条件下复板的撕裂尺寸更大.结果表明,在复板、炸药变化的情况下,爆炸焊接的边界效应依旧存在,只是产生的边界效应的严重程度有所不同;复板极限抗拉强度越低或炸药爆轰速度越高,边界效应现象越严重.
In order to reveal the mechanism of explosive welding boundary effect,LS-DYNA software and meshless SPH method is used to carry out two-dimensional numerical simulation of explosive welding boundary effect on TA2/Q235,Q235/Q235,Q235/TA2 and 304 stainless steel/Q235 composite plates respectively in this paper.The thickness of the flyer plate is 2 mm and the thickness of the based plate is 16 mm.By observing the flight attitude of the flyer plate in different simulation groups,it revealed that the tearing of the flyer plate occurs before the collision with the base plate.When the base plate is consistent and the explosives are emulsion explosives and expanded ammonium oil mixed explosives,the tearing size of the TA2 is larger than the Q235 steel and 304 stainless steel.When the base plate and flyer plate are made of Q235 steel,the tearing size of the flyer plate under the condition of emulsion explosive is larger than that under the condition of expanded ammonium oil mixed explosive.The above results show that the boundary effect of explosive welding still exists when the flyer plate and explosive change,but the severity of the boundary effect is different.The lower the ultimate tensile strength of the flyer plate or the higher the explosive velocity,the more serious the boundary effect phenomenon.
作者
缪广红
艾九英
胡昱
马宏昊
沈兆武
MIAO Guanghong;AI Jiuying;HU Yu;MA Honghao;SHEN Zhaowu(Anhui University of Science and Technology,Huainan,232001,China;CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei,230027,China)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2021年第9期61-66,I0004,I0005,共8页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(11902003,51874267)
安徽省高校自然科学基金重点项目(KJ2017A089)
高校优秀青年骨干人才国外访学研修项目(gxgwfx2019017).
关键词
爆炸焊接
边界效应
数值模拟
乳化炸药
explosive welding
boundary effect
numerical simulation
emulsion explosive
