动载作用下高强度钢的层裂特性研究  

Study on spalling characteristics of high strength steel under dynamic load

作　　者：初建鹏 冯建程 鞠翔宇 姜涛[1] CHU Jianpeng;FENG Jiancheng;JU Xiangyu;JIANG Tao(PLA Naval Submarine Academy,Qingdao 266044,China)

机构地区：[1]海军潜艇学院,山东青岛266044

出　　处：《兵器材料科学与工程》2024年第2期129-135,共7页Ordnance Material Science and Engineering

摘　　要：结合VISAR测试技术,进行平板撞击试验,得到G50和30CrMnSiNi2A钢试件的自由面速度-时间曲线,分析材料的层裂强度、层裂片厚度及各自的应变率;用LS-DYNA结合Johnson-Cook本构模型和最大拉应力断裂准则,数值模拟了平板撞击层裂现象。结果表明:G50钢抵抗冲击的能力优于30CrMnSiNi2A钢;层裂强度和弹性屈服极限随应变率增加而增加;最大拉应力断裂准则较好地描述了这两种材料的层裂现象;数值模拟结果与试验结果较吻合,验证了模型的可靠性。The free surface velocity-time curves of G50 and 30CrMnSiNi2A steel specimens were obtained by plate impact tests combined with VISAR testing technology,and the spall strength,spall thickness and strain rates of the materials were analyzed;The spallation phenomenon of plate impact was numerically simulated by using LS-DYNA combined with Johnson-Cook constitutive model and the maximum tensile stress fracture criterion.The results show that the impact resistance of G50 steel is better than that of 30CrMnSiNi2A steel.The spall strength and elastic yield limit increase with the strain rate rising.The maximum tensile stress fracture criterion could preferably describe the spallation phenomenon of these two materials.The numerical simulation results are in good agreement with the experimental results,which verifies the reliability of the model.

关 键 词：平板撞击试验 G50钢 30CRMNSINI2A钢 层裂 Johnson-Cook 数值模拟 

分 类 号：O347[理学—固体力学]