Simulating blast effects on steel beam-column members: Methods

Guzas, Emily; Earls, Christopher J.

doi:10.1016/j.compstruc.2011.08.014

Cited by 13 publications

(8 citation statements)

References 19 publications

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“…The test plate was modeled with parameters for annealed 304 stainless steel [36,37]. The parameters for A-36 steel were taken from ASTM-A36 [38]. The parameters for the 350 grade maraging steel were those of a similar, VascoMax 300 alloy [39], but with an adjusted yield strength of 2.195 GPa to better represent the C-350 grade steel used here [40].…”

Section: The Particle Contact Modelmentioning

confidence: 99%

High intensity impact of granular matter with edge-clamped ductile plates

Kyner

Dharmasena

Williams

et al. 2018

International Journal of Impact Engineering

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The deformation of ductile square stainless steel plates during central impact by high velocity, spherically symmetric granular particle shells has been investigated using an approach that combined large-scale experiments with numerical simulation. The study used suspended spherical explosive charges to accelerate 25 to 150 kg concentric shells of water saturated glass or higher density zirconia particles to velocities of 500-1200 m/s. The test charges were positioned above the center of 2.54 cm thick, 1.32 m x 1.32 m wide edge clamped panels made of 304 stainless steel, and their permanent deflection fields measured after testing. A novel edge restraint approach was utilized to avoid disruption of reflected particle flow over the impacted surface of the sample and so avoid plate failure near the gripped regions. The end of a Kolsky bar was positioned at a location symmetrically equivalent to the plate center, and was used to measure both the pressure and the specific impulse applied to the plate center. The evolution of the granular shell topology following charge detonation was characterized by analysis of high-speed video images. The radial expansion of the granular shells, the pressure and impulse that they transferred to the Kolsky bar, and the test plates out of plane displacement field were all well predicted by a discrete particlebased simulation approach. The study confirms earlier simplified model estimates of an approximately linear dependence of the plates out of plane displacement upon incident impulse, and validates the use of the edge restraint concept. It also experimentally identifies the existence of a granular shell velocity dependent instability at the leading edge of the fastest expanding granular shells.

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Section: The Particle Contact Modelmentioning

confidence: 99%

High intensity impact of granular matter with edge-clamped ductile plates

Kyner

Dharmasena

Williams

et al. 2018

International Journal of Impact Engineering

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“…To compare the displacements of the solid plates and the sandwich panels to the same test charge configuration, an additional set of simulations was performed using a fixed standoff distance (47.54 cm) to the back of both the solid plates and sandwich panels. The detonation was initiated on the surface of the HE sphere at the detonator location shown in The same Johnson-Cook parameters used in the reference solid plate study [34] were used to define the material properties for the 304 stainless steel honeycomb panels [40,41], the A-36 test support frame [42], the C-350 grade age hardened, maraging steel Kolsky bar [43,44], and the four carbon steel bolts that attached the panel to the support structure [45]. There was no fracture of the honeycomb panels or cells observed after testing.…”

Section: Fe Geometry Modelmentioning

confidence: 99%

Response of square honeycomb core sandwich panels to granular matter impact

Kyner

Dharmasena

Williams

et al. 2018

International Journal of Impact Engineering

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights  The out of plane displacement of edge restrained, grade 304 stainless steel sandwich panels has been measured after impact by rapidly expanding spherical shells of water saturated granular media at various velocities.  The radial expansion of the spherical shells was imaged using high-speed video techniques and the radial velocity shown to vary from 500 to1200 m/s. The impact pressure and transmitted impulse were also measured using a Kolsky bar positioned at a symmetric location to the panel center.  Discrete particle-based simulations successfully predicted particle front positions, velocities, impact pressures and plate deformations.  The study has confirmed recent predictions that the panels out of plane displacement would be less than that of an equivalent solid plate provided the deflection did not exceed the panel thickness.

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“…The J-C model parameters for 304SS were reported by Dean et al [83] and by Mori et al [84] for annealed 304SS. For the A-36 steel constitutive model, the model parameters for ASTM-A36 were assumed [85]. The J-C parameters for 350 grade, maraging steel were taken from parameters for a similar VascoMax 300 alloy [86], assuming approximately equivalent material properties with an adjusted yield strength parameter for 350 grade steel.…”

Section: Materials Modelsmentioning

confidence: 99%

“…The test plate was modeled with parameters for annealed 304 stainless steel [83,84]. The parameters for A-36 steel were taken from ASTM-A36 [85]. The parameters for the 350 grade maraging steel were those of a similar, VascoMax 300 alloy [86], but with an adjusted yield strength of 2.195 GPa to better represent the C-350 grade steel used here [87].…”

Section: Fe Geometry Modelmentioning

confidence: 99%

“…The spherical charge was suspended in space with specified standoff distances in Table 5. Johnson-Cook parameters were used to define the material properties for the 304 stainless steel honeycomb panels [83,84], the A-36 test support frame [85], the C-350 grade age hardened, maraging steel Kolsky bar [86,87], and the carbon steel bolts [88]. The material constants and…”

Section: Fe Geometry Modelmentioning

confidence: 99%

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Impulse Mitigation of Structures Impacted by Granular Media

Kyner¹

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as well as technical interest [18-20]. The impact of the granular media on a structure applies a net force for the duration of the loading. This change in momentum, ∆ = ∆ , results in a total impulse, I, applied to the structure with a specific impulse, Io, that represents the impulse per unit area on the impacted surface. The need for robust structural designs has led to the Chapter 1. Chapter 3. High intensity impulsive loading by explosively accelerated granular matter

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Simulating blast effects on steel beam-column members: Methods

Cited by 13 publications

References 19 publications

High intensity impact of granular matter with edge-clamped ductile plates

High intensity impact of granular matter with edge-clamped ductile plates

Response of square honeycomb core sandwich panels to granular matter impact

Impulse Mitigation of Structures Impacted by Granular Media

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