Dynamic response of metallic lattice sandwich structures to impulsive loading

• Published in: International journal of impact engineering Vol. 43; pp. 1 - 5
• Main Authors: Cui, Xiaodong, Zhao, Longmao, Wang, Zhihua, Zhao, Han, Fang, Daining
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2012; Elsevier
• Subjects: Air blast testing; Applied sciences; Deflection; Density; Dynamic response; Exact sciences and technology; Forming; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Impulsive loading; Impulsive resistant performance; Inelasticity (thermoplasticity, viscoplasticity...); Lattice sandwich plate; Lattices; Metals. Metallurgy; Perforated metals; Physics; Plates; Press forming of metal foils and wires; Production techniques; Sandwich structures; Sheet metal; Solid mechanics; Structural and continuum mechanics; Air blast testing; Impulsive loading; Lattice sandwich plate; Impulsive resistant performance; Cable; Vibration; Perforated plate; Welding; Rupture; Sandwich structure; Tetrahedral shape; Mechanical properties; Forming; Experimental study; Shock wave; Truss structure; Honeycomb structure; Pulse response; Sheet metal; Blast wave; Ballistics; Lattice structure; Impact test; Dynamic load
• ISSN: 0734-743X; 1879-3509
• DOI: 10.1016/j.ijimpeng.2011.11.004

The dynamic response of metallic lattice sandwich plates under impulsive loading is studied by experimental investigation. The sandwich structures composed of two identical face sheets and tetrahedral lattice cores, were designed and fabricated through perforated metal sheet forming and welding technology. The air blast experiment of lattice sandwich structures was performed by use of a four-cable ballistic pendulum system. The deformation/failure mechanisms were investigated through experimental observation and analysis. The impulsive resistance of the tetrahedral lattice sandwich structures is quantified by the maximum permanent transverse deflection of the back face sheet as a function of transmitted impulse. The maximum transverse deflections of tetrahedral lattice sandwich plates are compared with that of hexagonal honeycomb ones with identical parent materials and core relative density. The comparison implies that the tetrahedral lattice sandwich structures possess a better impulsive resistance.