Numerical Analysis for Impact Resistance of Nacre-Like Composites

Gao, Dongyang; Chen, Pengcheng; Lu, Guifang; Yang, Huiwei

doi:10.2139/ssrn.4387242

Cited by 1 publication

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“…Therefore, the resistance mechanism and morphological damage under different impact velocity need to be clearly explained, and provide guidance for the overall performance evaluation of the structure. For different nacre-like composites, the residual velocity of the bullets and the failure process of the structure were analyzed [37][38][39][40]. From the results, the velocity or kinetic energy reduced by the bullet penetrating the composite usually demonstrated non-linear characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Ballistic Performance of Semi-Cylindrical Nacre-like Composite Shells under High-Velocity Impact

et al. 2023

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The nacre has excellent impact resistance performance, and it is attracting attention in the field of aerospace composite research. Inspired by the layered structure from nacre, semi-cylindrical nacre-like composite shells of brittle silicon carbide ceramic (SiC) and aluminum (AA5083-H116) were established. Two types of tablet arrangements (regular hexagonal and Voronoi polygons) of the composites were designed, and the same size of ceramic and aluminum shell were established for the impact resistance analyzed numerically. In order to better compare the resistance performance of the four types of structures under different impact velocity, the following parameters were analyzed including energy variation, damage characteristic, bullet residual velocity, and semi-cylindrical shell displacement. The results show that the semi-cylindrical ceramic shells have higher rigidity and ballistic limit, but the severe vibration after impact causes penetrating cracks, and the whole structure failure occurred eventually. The nacre-like composites have higher ballistic limits than semi-cylindrical aluminum shells, and the impact of bullets only causes local failure. In the same conditions, the impact resistance of regular hexagons is better than Voronoi polygons. The research analyzes the resistance characteristic of nacre-like composites and single materials, and provides a reference for the design of nacre-like structures.

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Section: Introductionmentioning

confidence: 99%