Study On Hypervelocity Impact Of Energy Material Rod

Energy rod is a certain size of the rod that energy reactive material made through a certain process,the energy reactive material is a new type o f energy material,such as PTFE/Al,N i/Al and so on,which can initiate by high speed impact to damage to the target.Therefore,energy rod is different from ordinary metal rod on hypervelocity impacting.This paper mainly studied the PTFE/Zr rod,N i/Al rod and aluminum rod damage characteristics on thin and thick metal target.This paper is studied based on the experimental research,numerical simulation and theoretical analysis method,the concrete content is as follows:1.The energy rod of length to diameter ratio which is self-designed is 3:1 and 5:1.Using the secondary light gas gun of C hina Aerodynamic Research and Development Center launch it,launch speed is 1.8~5.2 km/s.The process of energy rod hypervelocity impact is photographed by high-speed camera,and obtained the perforation and crater data.The experimental results showed: the bowl-shaped crater is formed on thick steel rod and thick aluminum target by PTFE/Zr rod,the crater depth and diameter ratio(p/d value)is between 0.22~0.32,which is a minimum compared with the metal rod in the same conditions.PTFE/Zr rod and N i/Al rod can form a continuous luminous reaction debris cloud by impacting thin target,the damage results is far stronger than the metal rod;2.This paper simulated energy rod and metal hypervelocity impact thin and thick metal target by ANSYS/ls-dyna soft under different impact angle and velocity,The results showed: The energy rod model and parameters After debugging can calculat a result which is in good agreement with experimental data,p/d value of crater by Energy rod is smaller than aluminum rod under same condition,which is mainly related to target characteristic,impact velocity and impact angle;3.Analysis of the damage theory of energy rod is studied through combining experiment with numerical simulation,crater of energy rod impacted has a characteristic of big mouth but shallow pit.The perforation diameter on thin multilayer target is much larger than metal rod,which is caused by energy release in penetrating.