Study Of The Impact Protection Performance Of Fuze Micro-Stacked Structures

This paper introduces the application of laminated composite structures in the field of fuze protection.With the continuous progress of science and technology and the continuous renewal of weapons and equipment,the requirements for fuze protection technology are becoming higher and higher,and laminated composite structures,as an effective protection measure,have a wide range of application prospects and development space.The laminated composite structure is made up of multiple layers of alternating materials,which can be used for both shock wave dissipation and mechanical wave selective filtering.In fuse protection,the design of the laminated composite structure is very important.Generally,the structure consists of two different materials,a high-density metal or ceramic material for absorbing the energy of the shock wave and a low-density polymer or foam material for reducing the weight of the structure and improving its selective filtering effect.Therefore,an in-depth study of its material properties,preparation process and application effect,through reasonable material selection and structural design,can achieve the attenuation and selective filtering of shock waves,thus improving the safety and reliability of the fuze.This paper firstly introduces the ductile Ti and brittle Al₃Ti layers that make up the Ti/Al₃Ti microstack composites,and selects suitable material ontological models for the two components with different mechanical properties;Then the laminated material is used as the core of the protective housing application for high-impact electronic devices.The structure design and the matching relationship between the impedance and thickness of each layer are determined,and the stress-strain curve of the laminated composite protective shell under dynamic impact is predicted by this intrinsic relationship,so as to obtain a laminated structure that meets the requirements;Afterwards,the simulation analysis of the projectile penetration target plate is carried out by LS-DYNA software to verify the anti-penetration performance of the designed laminated structure.Finally,the structure of the Ti/Al₃Ti laminated composite was optimised and the intrusion resistance of the Ti/Al₃Ti laminated structure was analysed by simulating the Ti volume fraction,the number of layers and the gradient of layer thickness for different parameters in the laminated structure.The results show that when the volume fraction of Ti in the laminated material is increased,the anti-intrusion performance of the laminated material is improved to a certain extent;When the total number of layers of the laminated material is increased,the anti-intrusion performance of the laminated material is improved to a certain extent;When the gradient of the layer thickness of the laminated material is increased in the positive direction along the impact load,the anti-intrusion performance of the laminated material is improved to a certain extent.