The dynamic response of clamped rectangular Y-frame and corrugated core sandwich plates

The dynamic response of fully clamped, monolithic and sandwich plates of equal areal mass has been measured by loading rectangular plates over a central patch with metal foam projectiles. All plates are made from AISI 304 stainless steel, and the sandwich topologies comprise two identical face-sheet...

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Bibliographic Details
Published in:European journal of mechanics, A, Solids A, Solids, 2009-01, Vol.28 (1), p.14-24
Main Authors: Rubino, V., Deshpande, V.S., Fleck, N.A.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Corrugated plates
Deflection
Dynamic response
Exact sciences and technology
FE simulations
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Inelasticity (thermoplasticity, viscoplasticity...)
Lattice materials
Mathematical analysis
Physics
Plastic deformation
Plates
Projectiles
Sandwich plates
Solid mechanics
Structural and continuum mechanics
Tearing
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:The dynamic response of fully clamped, monolithic and sandwich plates of equal areal mass has been measured by loading rectangular plates over a central patch with metal foam projectiles. All plates are made from AISI 304 stainless steel, and the sandwich topologies comprise two identical face-sheets and either Y-frame or corrugated cores. The resistance to shock loading is quantified by the permanent transverse deflection at mid-span of the plates as a function of projectile momentum. At low levels of projectile momentum both types of sandwich plate deflect less than monolithic plates of equal areal mass. However, at higher levels of projectile momentum, the sandwich plates tear while the monolithic plates remain intact. Three-dimensional finite element (FE) calculations adequately predict the measured responses, prior to the onset of tearing. These calculations also reveal that the accumulated plastic strains in the front face of the sandwich plates exceed those in the monolithic plates. These high plastic strains lead to failure of the front face sheets of the sandwich plates at lower values of projectile momentum than for the equivalent monolithic plates.
ISSN:0997-7538
1873-7285
DOI:10.1016/j.euromechsol.2008.06.001