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A comparative study of impulse-resistant metal sandwich

Nov 01, 2004 · The performance of metal sandwich plates under impulsive blast loads is compared to that of solid plates made of the same material and having the same weight. Three core geometries are considered:pyramidal truss, square honeycomb and folded plate. Plates of infinite length and clamped along their sides are subject to uniform impulsive load. ASTM D6416 / D6416M - 16e1 Standard Test Method for 1.1 This test method determines the two-dimensional flexural properties of sandwich composite plates subjected to a distributed load. The test fixture uses a relatively large square panel sample which is simply supported all around and has the distributed load provided by a water-filled bladder.

Ballistic performance of composite metal foams - ScienceDirect

Jul 01, 2015 · High-performance hard armor systems for ballistic protection of aircraft, ground and amphibious vehicles, and personnel have always been the subject of study for researchers. Hard armor systems typically consists of multiple layers, with a ceramic or ceramic composite plate at the strike face, backed with a ductile material such as ballistic Blast resistance and energy absorption of sandwich panels Mar 01, 2017 · The dynamic response, blast resistance and energy absorption capability of clamped square sandwich panels comparing two aluminum alloy face-sheets and a layered gradient metallic foam core, subjected to air-blast loading, were studied numerically in this paper. CiteSeerX JOURNAL OF MECHANICS OF MATERIALS AND The primary fracture modes of the sandwich plates are necking and subsequent tearing of the face sheets and webs and shear delamination of the core webs from the faces. Plates with square honeycomb cores have higher damage tolerance than those with folded plate cores in that they can withstand much larger loads above those at which the first signs of fracture appear.

Comparative performance of composite sandwich panels and

Jan 14, 2015 · The performance of non-composite panels built of steel plates, concrete slabs, and composite sandwich panels in blast response reduction is examined and compared in the present study. The dynamic response of steel stiffened and unstiffened plates, plain concrete, reinforced concrete, and steel fiber reinforced concrete slabs, stiffened and unstiffened steel-foam-steel, and steel-sand-steel sandwich Constitutive model for quasistatic deformation of Allmetal sandwich construction holds promise for significant improvements in stiffness, strength and blast resistance for builtup plate structures. Analysis of the performance of sandwich plates under various loads, static and dynamic, requires modelling of face sheets and core with some fidelity. Experimental Investigation of Low-Velocity Repeated Sep 08, 2011 · The aim of this study was to experimentally investigate the effect of repeated low-velocity impacts on tensile strength of fiber metal laminates (FMLs) using instrumented drop weight impact tester. FMLs were fabricated layer by layer intercalating three layers of aluminum 6061 and two layers of glass fiber-reinforced epoxy. The FMLs were subjected to repeated low-velocity impacts (<10 m/s) at

Sandwich plates with functionally graded metallic foam

Jul 01, 2014 · 1. Introduction. Lightweight all-metallic sandwich plates consisting of two thin and strong face-sheets separated by thick and weak cellular cores have been increasingly exploited as blast resistant structures , , , , , , , , .The face-sheets are typically made of high strength solid material whilst the cellular metallic cores are highly porous, such as metallic foams with random cell The Resistance of Clamped Sandwich Beams to Shock Jun 22, 2004 · The structural response of the sandwich beam is split into three sequential steps:stage I is the one-dimensional fluid-structure interaction problem during the blast loading event, and results in a uniform velocity of the outer face sheet; during stage II the core crushes and the velocities of the faces and core become equalized by momentum sharing; stage III is the retardation phase over which the The Response of Metallic Sandwich Panels to Water Blast Metallic sandwich panels subject to underwater blast respond in a manner dependent on the relative time scales for core crushing and water cavitation. This article examines the response at impulses representative of an (especially relevant) domain:wherein the water cavitates before the core crushes.

Thermally Induced Stress Cycling (Thermal Shock) in

Thermally induced cyclic stresses are due to the resistance of the boiler structure to movement caused by thermal expansions and contractions within the boiler. The stresses occur every firing cycle (burner on, burner off), in varying magnitudes. Failures of this type may appear as leaks at the tube-to-tubesheet joints, cracked tubesheet Journal of Mechanics of Materials and Structures Vol. 2 Performance and failure of metal sandwich plates subjected to shock loading Ashkan Vaziri, Zhenyu Xue and John W. Hutchinson Vol. 2 (2007), No. 10, 19471963