摘要
通过理论和数值方法,对冲击载荷下金属正交波纹夹芯结构的动态压缩响应进行了研究。考虑材料应变率影响,建立了金属正交波纹夹芯结构动态响应的理论模型,同时对它的动态压缩响应进行了有限元模拟。结果表明,考虑材料应变率影响的理论模型的预测结果与有限元模拟结果吻合较好。进一步对多层正交波纹夹芯结构的动态压缩响应进行了数值模拟,获得了不同速度冲击下的变形模式,分析了层数对其动态响应的影响。研究发现,通过增加层数能够有效地增强结构的缓冲吸能能力,但层数超过4层以后增强效果不明显。
In this paper,dynamic compression response of metal orthogonal corrugated sandwich structures under impact loading is investigated theoretically and numerically.Considering the effect of strain rate of material,analytical models of dynamic response of metal orthogonal corrugated sandwich structure is developed.Finite element simulation of its dynamic compressive response is carried out.It is shown that there is a good agreement between the results based on the analytical model and finite element simulation.Furthermore,the dynamic compressive response of multi-layer orthogonal corrugated sandwich structure is studied using finite element method.Deformation modes under different impact velocities are obtained and the influence of the number of layers on the dynamic response is analyzed.It is found that the mitigation and energy absorption capacity of the sandwich structures can be effectively enhanced by increasing the number of layers while the number of layers have mild influence after exceeding four.
作者
朱源
张建勋
秦庆华
ZHU Yuan;ZHANG Jianxun;QIN Qinghua(State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2020年第1期51-62,共12页
Explosion and Shock Waves
基金
国家自然科学基金（11572234,11872291）
关键词
正交波纹结构
多层夹芯结构
动态压缩
应变率效应
缓冲吸能
orthogonal corrugated structure
multi-layer sandwich structure
dynamic compression response
strain-rate effect
mitigation and energy absorption
