Local buckling strength of steel foam sandwich panels

Szyniszewski, Stefan; Smith, B.H.; Hajjar, Jerome F.; Arwade, Sanjay R.; Schafer, Benjamin W.

doi:10.1016/j.tws.2012.04.014

Cited by 35 publications

(17 citation statements)

References 18 publications

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“…The model was expanded and validated for aluminum foams by Hanssen [14] to include nonlinear hardening, and later to also account for tensile fracture by Reyes et al [15]. Our experiments provided data for calibration of Deshpande-Fleck plasticity and enabled simulations of structural components discussed elsewhere [16]. The continuum level plasticity requires parameters from uni-axial compressive test.…”

Section: Macroscopic Constitutive Modelsmentioning

confidence: 96%

Characterization of Steel Foams for Structural Components

Smith

Szyniszewski

Hajjar

et al. 2012

Metals

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Experimentally measured mechanical properties of hollow sphere steel foam are the subject of this paper. The characterization of the hollow sphere foam encompasses compressive yield stress and densification strain, compressive plastic Poisson's ratio, and compressive unloading modulus, as well as tensile elastic modulus, tensile unloading modulus, tensile yield stress, and tensile fracture strain. Shear properties are also included. These tests provide sufficient information to allow calibration of a macroscopic, continuum constitutive model. Calibrated foam plasticity parameters are tabulated, and unique feature of foam plasticity are explained. Also, initial development of mesoscale simulations, which explicitly model voids and sintered hollow spheres, is reported. This work is part of a larger effort to help the development of steel foam as a material with relevance to civil engineering applications.

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Section: Macroscopic Constitutive Modelsmentioning

confidence: 96%

Characterization of Steel Foams for Structural Components

Smith

Szyniszewski

Hajjar

et al. 2012

Metals

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“…Sandwich panels, with a metallic foam core, increase buckling resistance even further [10]. "An important structural advantage of metallic foams that has not been demonstrated to date is the conversion of limit states from unstable buckling modes with little or no energy dissipation to stable modes with crashing and/or post-buckling" [1].…”

mentioning

confidence: 99%

The mechanical properties and modeling of a sintered hollow sphere steel foam

Szyniszewski

Smith

Hajjar

et al. 2014

Materials & Design (1980-2015)

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“…By comparison, the thickness of the honeycomb core wall of the aluminium alloy honeycomb sandwich structure is approximately 0.05 mm, which is approximately 1/40 of the former. The latter is more suitable for a large span spatial structure, which is especially sensitive to dead weight [11][12][13]. Therefore, this paper proposes a spatial assembly of an aluminium alloy honeycomb sandwich structure via a special connector to form a skeleton-free prefabricated large span Vierendeel roof system (referred to as a "honeycomb sandwich structure system" (HSSS)) [14].…”

Section: Introductionmentioning

confidence: 99%

Shear Strengths of Different Bolt Connectors on the Large Span of Aluminium Alloy Honeycomb Sandwich Structure

Zhao

Zheng

et al. 2017

Applied Sciences

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This study investigates the shear capacity of aluminum alloy honeycomb sandwich plates connected by high-strength, ordinary, or self-tapping bolts. For that purpose, experimental tests and finite elements are carried out. The failure of a high-strength bolt connector is driven by bending deformations developed in the bolt that deform connection plate and pad openings. In the case of ordinary bolt connectors, stress concentration on the bolt shear surface causes a large shear deformation that finally leads to failure. In the case of self-tapping bolt connectors, the insufficient mechanical bite force of the screw thread yields the bolt misalignment and concentrates shear deformation. As a result, the high-strength bolt connector is the most efficient design solution. If the bolt hole edge distance is more than 1.5 times as much as the bolt diameter, the connection performance becomes insensitive to this parameter. The practical formula for evaluating the connector shear capacity is derived from experimental data.

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Local buckling strength of steel foam sandwich panels

Cited by 35 publications

References 18 publications

Characterization of Steel Foams for Structural Components

Characterization of Steel Foams for Structural Components

The mechanical properties and modeling of a sintered hollow sphere steel foam

Shear Strengths of Different Bolt Connectors on the Large Span of Aluminium Alloy Honeycomb Sandwich Structure

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