摘要
基于纤维增强复合材料（FRC）层合板高速冲击下横向变形及破坏模式的分析，根据冲击动力学理论和应力波传播特性，建立了FRC层合板柱形弹高速冲击下的两阶段（剪切侵彻和连续侵彻）侵彻动力学分析模型。采用瞬态梯度变形锥理论分析了连续侵彻阶段的弹、靶相互作用，并编制相应计算程序，通过计算结果与实验测试结果的综合比较，弹体初速在300-900m／s范围内，剩余速度误差小于50m／s，验证了两阶段侵彻模型的适用性和稳定性，分析了实验现象，如梯度变形锥、背层花瓣开裂和面背层破坏模式差异等的产生及形成机理，提出了提高现有层板结构抗弹性能的新途径，如降低层间粘结强度、提高面层纤维的抗剪能力等。
According to the analysis of deformation and damage model of FRC laminates after ballistic impact, a two phase theoretical penetration model was presented, based on the impulsive dynamics and stress wave propagation analysis, which includes a shear penetration phase and the consecutive penetration phase. The transient trapezium deformation cone model was introduced firstly in this article, and the interaction between projectile and target in the consecutive penetration phase was discussed by this model. The calculation code by V-Fortran was compiled and the calculation results were perfect compared with experimental results. When the initial velocity is 300-900 m/s, the difference is less than 50 m/s. The emergence and come-into-being mechanisms of some experimental phenomena, such as trapezium deformation cone, petal breakage on back face and the difference in the damage model between FRC＇s front and back faces, have been made clear now, and some new ways and rules, which can be in favor of improving ballistic resistance capability of FRC, are put forward, such as： reduce the content of matrix and the interlaminate strength or increase the shearing resistance of front layers, etc.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2006年第2期143-149,共7页
Acta Materiae Compositae Sinica
基金
军队"十五"预研基金项目
关键词
高速冲击
FRC
应力波
瞬态梯度变形锥
high-velocity impact
FRC
stress wave
trapezium deformation cone model
