Research On Anti-blast Characteristics And Influencing Factors Of High Performance Fiber Fabrics

Explosion accident in aviation aircraft has high risk and great social influence.In order to ensure flight safety,airworthiness regulations put forward design requirements for cabin explosion-proof.With the progress of material,high performance fibers have been developed in bullet-proof and anti-blast area for their light weight and high strength.At present,the research on the anti-blast performance of high-performance fabrics are relatively limited at home and abroad,so it is of great significance to study the anti-blast performance and influence factors of high-performance fabrics.In this paper,combined with the national key research and development project,domestic high-performance aramid fiber plain woven fabric F-268,carbon fiber HF30S-12 K fabric,ultra-high molecular weight polyethylene fiber fabric ZTZ-24 are selected to design hybrid fabrics to achieve anti-blast function.The mechanical properties test,blast test and numerical simulation of the fabrics were carried out.Based on the test and calculation results,the influencing factors of the blast resistance of the fabric were analyzed.The quasi-static and dynamic tensile tests were carried out on three kinds of fabrics respectively.The basic mechanical parameters and dynamic failure behaviors of the three fabrics were obtained.The constitutive relationship and failure model of the materials were calibrated;The blast test of fabrics were carried out,and the response behaviors such as oscillation,bulging deformation,shrinkage of free edge and yarn pulling off were observed.After the test,the failure modes such as hole,tear and burn appeared;The finite element model of fabrics and the analysis model were established by LS-DYNA.The accuracy of the model is verified by the dynamic response,failure mode and hole size of the fabric.The damage evolution and energy dissipation mechanism of the fabric during the impact process were obtained,and the blast resistance of the fabric is compared with that of steel and aluminum alloy;The effects of fabric thickness,different stack methods and stitching on the fabrics were studied.The results show that carbon fiber fabric is not suitable to be used as anti-blast material alone,UHMWPE fiber fabric is greatly affected by temperature,so it is not suitable to be used as front surface;stitching fabrics will affect the deformation mode of fabric,and enhance the anti-blast ability of fabric;changing the stacking angle of fabric can improve the anti-perforation ability of fabric,The peak deformation of each thickness of fabric is inversely proportional to the scaled distance.At the same time,the energy of UHMWPE fabric dissipates most of the energy under the blast load,increasing the proportion of UHMWPE layer can improve the energy absorption.Based on the study of the anti-blast performance and influencing factors of high performance fiber fabrics,the experimental and numerical analysis methods of flexible fabrics under blast impact are established,and the anti-blast ability of three kinds of fabrics is evaluated.The research conclusions can support the material selection and function design of flexible anti-blast structures.