Study on a Method to Determine the Transverse Impact Strength of Propellants Based on Impact Absorbing Energy,Propellants, Explosives, Pyrotechnics

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Study on a Method to Determine the Transverse Impact Strength of Propellants Based on Impact Absorbing Energy
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-06-30 , DOI: 10.1002/prep.202100084
Ji‐Hua Liu ₁ , Chang‐Hui He ₁ , Rui‐Hua Zhang ₁ , Hong‐Li Zhao ₁ , Qiong‐Lin Wang ₁

Affiliation

In this paper, a measurement method of the transverse impact strength of propellant based on the initial fracture impact absorbing energy in the drop weight impact test is proposed. According to the relationship between load and time, displacement was deduced. The correctness and reliability of the displacement were confirmed by comparing it with the displacement by the digital image correlation method (DIC). Combined with a high-speed camera, the impact process image was collected, and the initial fracture point was determined by the load-displacement curve. Then the impact absorbing energy corresponding to the initial fracture point was obtained by integrating the displacement with a load. The transverse impact strength of the propellant can be acquired based on the initial cross-sectional area of the sample. By comparison, it is found that the coefficient of variation and dispersion degree of the measurement results by the proposed method at low and room temperature are significantly less than those by the traditional pendulum test. That is, the consistency and repeatability of the proposed method are better. The result proves the feasibility and reliability of the method based on the initial fracture impact absorbing energy to measure the transverse impact strength of propellants.

中文翻译：

基于冲击吸收能确定推进剂横向冲击强度的方法研究

本文提出了一种基于落锤冲击试验初始断裂冲击吸收能的推进剂横向冲击强度测量方法。根据载荷与时间的关系，推导出位移。位移的正确性和可靠性通过数字图像相关法(DIC)与位移的比较得到证实。结合高速摄像机采集冲击过程图像，根据载荷位移曲线确定初始断裂点。然后通过对位移与载荷的积分得到对应于初始断裂点的冲击吸收能量。推进剂的横向冲击强度可以根据样品的初始横截面积获得。通过比较，结果表明，所提方法在低温和常温下测量结果的变异系数和离散程度均显着小于传统摆锤试验。即所提方法的一致性和可重复性较好。结果证明了基于初始断裂冲击吸收能量测量推进剂横向冲击强度的方法的可行性和可靠性。

更新日期：2021-06-30

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