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<p>Aluminium foam-filled cylindrical shells are an excellent buffer used in many fields. When the missile penetrates the target at high speed, it will generate high impact load of tens of thousands or even hundreds of thousands of g (g is the acceleration of gravity), which often affects or even destroys the core devices inside the missile (including explosives, fuses and circuit boards, etc.), thus greatly reducing the safety and destructive power of the missile, so it is necessary to efficiently reduce the overload value of the core devices in a very short period of time, and the ordinary cylindrical shells face the problems of insufficient deformation efficiency and buffer energy absorption efficiency, so it needs to be structurally optimised, such as grooving, to change its deformation mode during the working process, to improve its deformation efficiency and buffer energy absorption efficiency, so that it can be applied to the scenario of efficiently reducing the impact loads. In this paper, the mechanical behaviour (including deformation patterns, energy absorption properties and macroscopic properties) and reduced-height overload effects of aluminium-foam-filled (grooved) cylindrical shells are investigated by means of mechanical tests loaded with different strain rates and numerical simulations of reduced-height overload effects. The results show that the buffer composite material assembled in the combat section can efficiently reduce the impact load on the core device, and the buffer energy absorption efficiency of the aluminium foam-filled 5-mm-thick outer grooved cylindrical shell is the best when the penetration speed is 1700m/s, in which the peak overload value of the stage of the penetration of the bullet shielding layer is reduced to 43,600&#xa0;g, and the peak overload value of the stage of the penetration of the support layer is reduced to 29,500&#xa0;g, and the impulse-isolation efficiency in the stage of the penetration of the bullet shielding layer of the combat section reaches 67.12%, and the impulse-isolation efficiency in the stage of the penetration of the combat section reaches 71.02%. The data from the tests and simulations in this paper can be used as a reference for the design and manufacture of practical engineering.</p>

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Mechanical behaviour of aluminium foam-filled grooved cylindrical shells and its height reduction overload effect study

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Heng Ye,
  • Chun Cheng,
  • Xiangfei Peng,
  • Weiying Wen,
  • Xiaoming Chen

摘要

Aluminium foam-filled cylindrical shells are an excellent buffer used in many fields. When the missile penetrates the target at high speed, it will generate high impact load of tens of thousands or even hundreds of thousands of g (g is the acceleration of gravity), which often affects or even destroys the core devices inside the missile (including explosives, fuses and circuit boards, etc.), thus greatly reducing the safety and destructive power of the missile, so it is necessary to efficiently reduce the overload value of the core devices in a very short period of time, and the ordinary cylindrical shells face the problems of insufficient deformation efficiency and buffer energy absorption efficiency, so it needs to be structurally optimised, such as grooving, to change its deformation mode during the working process, to improve its deformation efficiency and buffer energy absorption efficiency, so that it can be applied to the scenario of efficiently reducing the impact loads. In this paper, the mechanical behaviour (including deformation patterns, energy absorption properties and macroscopic properties) and reduced-height overload effects of aluminium-foam-filled (grooved) cylindrical shells are investigated by means of mechanical tests loaded with different strain rates and numerical simulations of reduced-height overload effects. The results show that the buffer composite material assembled in the combat section can efficiently reduce the impact load on the core device, and the buffer energy absorption efficiency of the aluminium foam-filled 5-mm-thick outer grooved cylindrical shell is the best when the penetration speed is 1700m/s, in which the peak overload value of the stage of the penetration of the bullet shielding layer is reduced to 43,600 g, and the peak overload value of the stage of the penetration of the support layer is reduced to 29,500 g, and the impulse-isolation efficiency in the stage of the penetration of the bullet shielding layer of the combat section reaches 67.12%, and the impulse-isolation efficiency in the stage of the penetration of the combat section reaches 71.02%. The data from the tests and simulations in this paper can be used as a reference for the design and manufacture of practical engineering.