Frangibility of frangible bullet upon impact on a hard target

Bui, Xuan Son; Komenda, Jan; Vítek, Roman

doi:10.1109/miltechs.2017.7988721

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…it caused the strength bonding relate on transfer load from matrix to reinforcement [16]. The range of density value of this experiment is suitable on requirement properties of frangible ammunition [17][18]…”

Section: Resultsmentioning

confidence: 99%

Optimization of Mixing Speed Parameter for Homogeneous Cu-Sn Composite

Widyastuti

Kurniawan

Sa'di

et al. 2023

KEM

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The crucial manufacturing process in powder metallurgy (PM) is the mixing process. This process ensures blending sufficiently to achieve a uniform and consistent product. Various mixing parameters provide an impact on product properties and fluency during the mixing process. The mixing speed is the most considered parameter which affects the homogeneity and properties of the PM product. The powder of 89,95% wt Cu and 10%wt Sn was mixed at 14, 22, 30, 38 rpm respectively for 120 minutes using a double cone mixer to obtain homogeneity pow-der mixture at 40% filling rate mixer. The mixed powder was compacted at 700 MPa in the 4-column compacting machine. Green compact product was sintered at 200°C for 20 minutes. Sintered specimens were investigated on densification and hardness test. The microstructure was investigated by SEM/EDX and X-ray diffraction. The result showed that the Cu particle form to flake shape, while the Sn particle tends to form irregular rod-like. Particle size on Cu-Sn composite most being finer along with increasing mixing speed. Homogenously distributed dispersed Cu and Sn particles can be achieved successfully at 30 rpm. Furthermore, the hardness test value was 94,2 HRF. The density was 7,45 g/cm3 and the porosity was 15,19% Particle size decrease to 4.517 μm with increasing mixing speed.

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Section: Resultsmentioning

confidence: 99%

Optimization of Mixing Speed Parameter for Homogeneous Cu-Sn Composite

Widyastuti

Kurniawan

Sa'di

et al. 2023

KEM

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“…The captured fragments were divided into five size classes according to the external size of the individual fragment, and the fragments were distinguished using a fixed mesh size sieve. The fragility of the projectile was quantified using the frangibility factor (FF E ) [18], defined by Equation ( 4):…”

Section: Low-speed Impact Testsmentioning

confidence: 99%

Effect of aging on damage properties and reaction characteristics of typical 2,4‐dinitroanisole (DNAN)‐based melt‐cast explosives under low‐velocity impact

Ma,

Yang,

Luo

et al. 2023

Propellants Explo Pyrotec

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The effects of aging degradation on the safety performance of typical 2,4‐dinitroanisole (DNAN)‐based melt‐cast explosives (MCEs) were studied. An in‐house‐designed low‐velocity impact device and a closed bomb were used to study the effects of aging on the fragmentation and reactivity of DNAN‐based MCEs under impact damage. The test results showed that after artificially accelerated aging of the bare grain, the mass decreased, volume increased, and compressive strength increased, resulting in physical defects such as cracks and debonding occurring inside the explosive. The degree of damage to the DNAN‐based melt‐cast explosive increased with an increase in the impact velocity. Artificial aging increases the degree of damage and impact sensitivity of explosives. The relationship between the degree of fragmentation and the impact velocity under different aging times was revealed through the frangibility factor (FFE) and dynamic activity (L). The microcracks formed by DNAN sublimation and aging significantly affected the sample reaction violence.

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