Influence on Fragment Characteristics of Liner Thickness in Corrugated Liner Charge Under Explosive loads

The experimental and numerical researches were conducted to investigate the influence on fragment characteristics of liner thickness in corrugated liner charge under explosive loads in this paper. Experimental results show that both the 1.0 mm and 1.5 mm thick corrugated liner charges effectively control the fragmentation of the casing, and the former exhibit a higher average fragment mass and superior mass distribution characteristics. Meanwhile, observations under SEM reveal a 10% greater depth of energy focusing effect in 1.0 mm thick corrugated liner charge. Numerical simulations illustrate that the corrugated liner charges with different liner thicknesses can effectively control the fragmentation of casing, with the process of fragmentation containing the collapse of the corrugated liner under explosive loads, the localized effect on the casing of the energy focusing flows generated by corrugated liner and the controlled fragmentation of casing. Simulations demonstrate that the 1.0 mm thick corrugated liner charge achieves optimal performance in stress characteristics in the casing, average fragment mass and depth of energy focusing effect among the corrugated liner charges with different liner thicknesses. Additionally, numerical simulations show that the fragment velocity decreases as the thickness of the corrugated liner increases in corrugated liner charges with different liner thicknesses. The findings offer a reference for the design and optimization of the related charge configurations in the future.