Elastic-plastic dynamic response of fully backed sandwich plates under localized impulsive loading

In this paper a skyscrapers frame-core wall structure as an example in Kun Ming, using two independent software, SATWE and ETABS, analyzed the dynamic characteristics and dynamic response of structures with earthquake in linear elastic phase and the elastic-plastic phase respectively, so that could evaluate rationality of the design of the structure as a whole and seismic performance superior or not, and it could provide an idea for audit drawing or proofread their own.

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Dynamic Response of an Elastic-Plastic Free-Free Beam Subjected to Impact at any Cross-Section along its Span

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.177-180.273 ◽

2000 ◽

Vol 177-180 ◽

pp. 273-278 ◽

Cited By ~ 4

Author(s):

Jin Long Yang ◽

F. Xi

Keyword(s):

Dynamic Response ◽

Cross Section ◽

Elastic Plastic ◽

Free Beam

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Impulsive Forming of Shell Structures With Apertures

Applied Mechanics and Biomedical Technology ◽

10.1115/imece2003-41811 ◽

2003 ◽

Author(s):

V. Sabelkin

Keyword(s):

Dynamic Response ◽

High Explosive ◽

Impulsive Loading ◽

Shell Structures ◽

Plastic Properties ◽

Aperture Diameter ◽

Jet Engine ◽

Explosive Charges ◽

Explosive Forming ◽

Static And Dynamic Loading

Different modern shell structures are exposed to impulsive loading very often. Some of them may have different imperfections such as apertures, welds, and irregular thickness. These structures can be made by static or impulsive loading. To know fractureless dynamic response of shell structures with apertures is important in many cases, especially for forming processes, because of the first appeared fracture can extend through a shell blank especially if material is brittle with low plastic properties. The tooling for impact and static loading of flat and shell structures was developed. Dynamic response of shell structures with unsupported apertures on internal impulsive loading by point high explosive charges is described. Strain state of shaped shell structures with apertures after explosive forming is shown. The limit aperture diameter for dynamic fractureless response is determined. Distributions of strain intensities on a sample cross section for different aperture diameters, static and dynamic loading are shown. Different jet engine parts were made using developed technology.

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Dynamic Response of Metallic Y-Frame Core Sandwich Panels Subjected to Air Blast Loading: Numerical Investigation

Volume 3: Structures, Safety, and Reliability ◽

10.1115/omae2019-96628 ◽

2019 ◽

Author(s):

Ting Liu ◽

Yuansheng Cheng ◽

Jun Liu ◽

Ganchao Chen ◽

Changhai Chen ◽

...

Keyword(s):

Dynamic Response ◽

Sandwich Panel ◽

Sandwich Panels ◽

Face Sheet ◽

Front Face ◽

Sandwich Plates ◽

Air Blast ◽

Solid Plate ◽

Blast Performance ◽

Air Blast Loading

Abstract In this paper, the dynamic response of metallic Y-frame core sandwich plates subjected to air blast loading was investigated by employing the LS-DYNA software. The blast wave was generated by the directly detonation of TNT explosives. The deformation/failure modes and associated structural response were identified and analyzed in detail. Main attention was paid to explore the effects of face sheet thicknesses and core web thickness on the deformation response of Y-frame core sandwich plates. A comparison on the blast performance were drawn among the Y-frame core sandwich panel, corrugated core sandwich panel and solid plate in equal areal mass. Numerical results revealed that the Y-frame core sandwich panel experienced indent deformation in the front face, strut buckling in the core and large bending deformation in the back face under the stand-off distance of 100 mm. Increasing the face sheets and core web thicknesses could improve the blast performance of Y-frame core sandwich panels. The deflections of face sheets were sensitive to the variation of front face sheet and core thicknesses. Moreover, Y-frame sandwich panel has comparable anti-blast capacity with the corrugated counterparts and exhibits superior blast resistance than the solid plate.

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