A customized pulse load test system and method based on gradient aluminum foam

Abstract

The invention discloses a test method for customizing pulse loads based on gradient foamed aluminum. The method comprises the following steps that according to the waveform of the pulse load needing to be customized, the length, the gradient sequence and the shot speed of a gradient foamed aluminum shot are designed; the designed gradient foamed aluminum shot is prepared; and the prepared gradient foamed aluminum shot is ejected out from a first-level light-gas gun with the designed shot speed, and accordingly the customized pulse load waveform is formed at the position of a shot target hitting position. According to the method, the method capable of generating different waveforms of pulse loads in a customizing manner is provided for researchers and project designers, and by means of the method, multiple waveforms including a triangular pulse load, a rectangular pulse load and an explosion pulse load can be customized. The method can be widely applied to test simulation of the explosion impact load in the fields of traffic transportation, safety protection, military and the like, the test cost can be effectively saved, and considerable economic benefits are achieved.

Description

technical field

[0001] The invention belongs to the technical field of pulse load test loading, in particular to a customized pulse load test system and method based on gradient aluminum foam, in particular to a method for customizing pulse loads with different waveforms in a laboratory. Background technique

[0002] The dynamic response of structures under impulse loads such as explosive shocks is an important research topic that widely exists in the fields of transportation, security protection, and military affairs, and has attracted extensive attention from researchers from all over the world. However, experimental research on this topic lags far behind theoretical and numerical methods. The reason is that the test loading of pulse loads such as explosive shocks often involves high-energy explosives. This loading method has disadvantages such as poor safety, the need for a special test site, complex technology, and high cost, especially the inability to customize the req...

Examples

Embodiment 1

[0050] to get attached Figure 4As shown in the triangular waveform, first design the gradient sequence of the gradient aluminum foam projectile (in the form of density gradient) so that the relative density of the foam aluminum layer decreases linearly from 0.15 to 0.05 from the warhead to the tail.

[0051] Cut ten kinds of aluminum foams with different densities (relative density is 0.05-0.15) into column blocks (including at least three cells) with a cross-sectional diameter of 57mm and a thickness of 10mm; stack each column block in turn according to the designed density gradient sequence In general, the layers are connected by flux-free brazing method, and the brazing material used is Zn-Al-Cu-based alloy, see figure 2 .

[0052] After the welding is completed, the gradient aluminum foam projectile is left to cool down, and then the surface of the gradient foam aluminum projectile is polished to make it smooth.

[0053] Finally, fill the gradient aluminum foam project...

Embodiment 2

[0055] to get Figure 5 The rectangular waveform shown in , firstly, the gradient sequence (in the form of density gradient) of the gradient foam aluminum projectile is designed so that the relative density of the foam aluminum layer increases linearly from 0.08 to 0.12 from the warhead to the tail.

[0056] Cut ten kinds of aluminum foams with different densities (relative density is 0.08-0.12) into column blocks (including at least three cells) with a cross-sectional diameter of 57mm and a thickness of 10mm; stack each column block in sequence according to the designed density gradient sequence In general, the layers are connected by flux-free brazing method, and the brazing material used is Zn-Al-Cu-based alloy, see figure 2 .

[0057] After the welding is completed, the gradient aluminum foam projectile is left to cool down, and then the surface of the gradient foam aluminum projectile is polished to make it smooth.

[0058] Finally, fill the gradient aluminum foam proj...

technical field

[0001] The invention belongs to the technical field of pulse load test loading, in particular to a customized pulse load test system and method based on gradient aluminum foam, in particular to a method for customizing pulse loads with different waveforms in a laboratory. Background technique

[0002] The dynamic response of structures under impulse loads such as explosive shocks is an important research topic that widely exists in the fields of transportation, security protection, and military affairs, and has attracted extensive attention from researchers from all over the world. However, experimental research on this topic lags far behind theoretical and numerical methods. The reason is that the test loading of pulse loads such as explosive shocks often involves high-energy explosives. This loading method has disadvantages such as poor safety, the need for a special test site, complex technology, and high cost, especially the inability to customize the req...

Examples

Embodiment 1

[0050] to get attached Figure 4As shown in the triangular waveform, first design the gradient sequence of the gradient aluminum foam projectile (in the form of density gradient) so that the relative density of the foam aluminum layer decreases linearly from 0.15 to 0.05 from the warhead to the tail.

[0051] Cut ten kinds of aluminum foams with different densities (relative density is 0.05-0.15) into column blocks (including at least three cells) with a cross-sectional diameter of 57mm and a thickness of 10mm; stack each column block in turn according to the designed density gradient sequence In general, the layers are connected by flux-free brazing method, and the brazing material used is Zn-Al-Cu-based alloy, see figure 2 .

[0052] After the welding is completed, the gradient aluminum foam projectile is left to cool down, and then the surface of the gradient foam aluminum projectile is polished to make it smooth.

[0053] Finally, fill the gradient aluminum foam project...

Embodiment 2

[0055] to get Figure 5 The rectangular waveform shown in , firstly, the gradient sequence (in the form of density gradient) of the gradient foam aluminum projectile is designed so that the relative density of the foam aluminum layer increases linearly from 0.08 to 0.12 from the warhead to the tail.

[0056] Cut ten kinds of aluminum foams with different densities (relative density is 0.08-0.12) into column blocks (including at least three cells) with a cross-sectional diameter of 57mm and a thickness of 10mm; stack each column block in sequence according to the designed density gradient sequence In general, the layers are connected by flux-free brazing method, and the brazing material used is Zn-Al-Cu-based alloy, see figure 2 .

[0057] After the welding is completed, the gradient aluminum foam projectile is left to cool down, and then the surface of the gradient foam aluminum projectile is polished to make it smooth.

[0058] Finally, fill the gradient aluminum foam proj...

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