Anti-explosion performance analysis and dynamic response characteristics of titanium metal sandwich panels with various core configurations

TY - JOUR

T1 - Anti-explosion performance analysis and dynamic response characteristics of titanium metal sandwich panels with various core configurations

AU - Zhang, Changle

AU - Wang, Yangwei

AU - Bao, Jiawei

AU - Zhao, Pingluo

AU - He, Lei

AU - Zhang, Zhizu

AU - Liu, Han

AU - An, Rui

AU - Liu, Jintao

AU - Han, Yirui

AU - Geng, Xuran

AU - Xue, Da

AU - Guo, Zimeng

AU - Wu, Songlin

N1 - Publisher Copyright: © 2025 The Authors.

PY - 2026/1/1

Y1 - 2026/1/1

N2 - The titanium metal sandwich panel was designed to satisfy the ultimate demand of achieving outstanding anti-explosion performance. Compared with bonded steel honeycomb and aluminum alloy honeycomb, this paper prepared titanium metal honeycomb material using laser welding method. The honeycomb core was hot pressed and compounded with Ti–6Al–4V alloy plate through an autoclave process, highlighting the lightweight advantage. Using mechanical testing methods, it found that the specific energy absorption and platform stress of titanium metal honeycomb materials vary approximately proportional to their specific strength. Using the evaluation parameters of anti-convex deformation coefficient( P †c), energy dissipation, and clipping rate, air explosion tests and simulations were used to evaluate lattice and honeycomb sandwich panels with similar areal densities. The result showed that the honeycomb core had lower specific strength (reducing 2.8 kN m/kg) and better anti-explosion performance ( P †c increases 0.07), and innovatively proposed that the anti-explosion performance was approximately negatively correlated with the cores’ dynamic specific strength( c u). Namely, P †c = f ( c u) = 2.76785 × 10−4 c u2 - 0.04452 c u + 3.38518, and the c u should be selected within the range of 48.8–74.9 kN m/kg. The increase in c u can lead to more severe fracture failure of the front face of the sandwich panel, and may even cause fracture failure of the back face. The overall failure characteristics of the lattice and honeycomb sandwich panel is similar. But in the local failure mode, wrinkles and local buckling deformation occur on the side of the honeycomb cell near the blast surface, and a bifurcation phenomenon occurs between some of the cell wall welding points.

AB - The titanium metal sandwich panel was designed to satisfy the ultimate demand of achieving outstanding anti-explosion performance. Compared with bonded steel honeycomb and aluminum alloy honeycomb, this paper prepared titanium metal honeycomb material using laser welding method. The honeycomb core was hot pressed and compounded with Ti–6Al–4V alloy plate through an autoclave process, highlighting the lightweight advantage. Using mechanical testing methods, it found that the specific energy absorption and platform stress of titanium metal honeycomb materials vary approximately proportional to their specific strength. Using the evaluation parameters of anti-convex deformation coefficient( P †c), energy dissipation, and clipping rate, air explosion tests and simulations were used to evaluate lattice and honeycomb sandwich panels with similar areal densities. The result showed that the honeycomb core had lower specific strength (reducing 2.8 kN m/kg) and better anti-explosion performance ( P †c increases 0.07), and innovatively proposed that the anti-explosion performance was approximately negatively correlated with the cores’ dynamic specific strength( c u). Namely, P †c = f ( c u) = 2.76785 × 10−4 c u2 - 0.04452 c u + 3.38518, and the c u should be selected within the range of 48.8–74.9 kN m/kg. The increase in c u can lead to more severe fracture failure of the front face of the sandwich panel, and may even cause fracture failure of the back face. The overall failure characteristics of the lattice and honeycomb sandwich panel is similar. But in the local failure mode, wrinkles and local buckling deformation occur on the side of the honeycomb cell near the blast surface, and a bifurcation phenomenon occurs between some of the cell wall welding points.

KW - Anti-explosion performance

KW - Core material type

KW - Failure characteristics

KW - Honeycomb sandwich panel

KW - Specific strength

UR - https://www.scopus.com/pages/publications/105027631661

U2 - 10.1016/j.jmrt.2025.12.233

DO - 10.1016/j.jmrt.2025.12.233

M3 - Article

AN - SCOPUS:105027631661

SN - 2238-7854

VL - 40

SP - 3968

EP - 3987

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

ER -