Deformation and failure of blast-loaded metallic sandwich panels—Experimental investigations

• Published in: International journal of impact engineering Vol. 35; no. 8; pp. 937 - 951
• Main Authors: Zhu, Feng, Zhao, Longmao, Lu, Guoxing, Wang, Zhihua
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2008; Elsevier Science
• Subjects: Blast loading; Deformation/failure modes; Exact sciences and technology; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Honeycomb; Inelasticity (thermoplasticity, viscoplasticity...); Physics; Sandwich panel; Solid mechanics; Structural and continuum mechanics; Sandwich panel; Deformation/failure modes; Blast loading; Honeycomb; High strain; Measurement sensor; Rupture; Sandwich structure; Experimental study; Modeling; Finite element method; Inelasticity; Honeycomb structure; Experimental design; Plasticity; Blast wave; Ballistics; Pendulum; Inelastic shock; Structural analysis; Mechanical shock
• ISSN: 0734-743X; 1879-3509
• DOI: 10.1016/j.ijimpeng.2007.11.003

Metallic sandwich panels with a cellular core such as honeycomb have the capability of dissipating considerable energy by large plastic deformation under impact/blast loading. To investigate the structural response of sandwich panels loaded by blasts, a large number of experiments have been conducted, and the experimental results are reported and discussed in this paper. Quantitative results were obtained based on the measurement in the tests by a ballistic pendulum with corresponding sensors, and then the deformation/failure modes of specimen were classified and analysed systematically. The experimental programme was designed to investigate the effects on the structural response of face-sheet and core configurations, i.e. face-sheet thickness, cell size and foil thickness of the honeycomb, and mass of charge. The experimental data were then compared with the predicted data from finite element simulations, and the results show a good agreement between the experimental and computational studies.