A Study on the Structural Stability according to the Shapes and Load Conditions for Single-Layer Latticed Spherical Dome with Span 300m

In this article, the design procedure for a single layer spherical dome engineering project, with openings and large depth-to-span ratio is introduced and its installation method is explained briefly. The supporting node and the connection node are described in detail. Using the 3-D straight beam element with constant cross section in T.L. Formulation, the eigen-buckling of this spherical dome is analyzed by the Block Lanczos Method and the equilibrium path is traced taking the initial geometric imperfection into account by the Cylindrical Arc Length Method. The influence of the wind force on the load capacity of the dome is discussed. Using the Subspace Iteration Method, the first 20 frequencies and their vectors are calculated. Some properties are also discussed. Conclusions are drawn and several suggestions are put forward in the paper.

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Structural stability analysis of single-layer reticulated shells with stochastic imperfections

Engineering Structures ◽

10.1016/j.engstruct.2016.06.046 ◽

2016 ◽

Vol 124 ◽

pp. 473-479 ◽

Cited By ~ 19

Author(s):

Huijuan Liu ◽

Wei Zhang ◽

Hao Yuan

Keyword(s):

Stability Analysis ◽

Structural Stability ◽

Single Layer

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Structural stability of single-layer PdSe2 with pentagonal puckered morphology and its nanotubes

Physical Chemistry Chemical Physics ◽

10.1039/d0cp00979b ◽

2020 ◽

Vol 22 (16) ◽

pp. 8289-8295 ◽

Cited By ~ 1

Author(s):

Artem V. Kuklin ◽

Hans Ågren ◽

Pavel V. Avramov

Keyword(s):

Structural Stability ◽

2D Materials ◽

Single Layer ◽

First Principle ◽

First Principle Calculations ◽

Stability And Instability

Based on first-principle calculations, we demonstrate structural stability and instability of several recently proposed 2D materials with pentagonal morphology including the experimentally exfoliated single-layer PdSe2.

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Investigation of RBC Remodeling With a Multiscale Model

ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology ◽

10.1115/nemb2010-13121 ◽

2010 ◽

Author(s):

Qiang Zhu ◽

Zhangli Peng ◽

Robert J. Asaro

Keyword(s):

Blood Cell ◽

Lipid Bilayer ◽

Structural Stability ◽

Composite Membrane ◽

Red Blood Cell ◽

Normal State ◽

Single Layer ◽

Multiscale Model ◽

The Other ◽

Mechanical Loads

Erythrocyte (red blood cell, or RBC) possesses one of the simplest and best characterized molecular architectures among all cells. It contains cytosol enclosed inside a composite membrane consisting of a fluidic lipid bilayer reinforced by a single layer of protein skeleton pinned to it. In its normal state, this system demonstrates tremendous structural stability, manifested in its ability to sustain large dynamic deformations during circulation. On the other hand, it has been illustrated in experiments that triggered by mechanical loads structural remodeling may occur. A canonical example of this remodeling is vesiculation, referring to the partial separation of the lipid bilayer from the protein skeleton and the formation of vesicles that contain lipids only.

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Crystalline order to a resolution of 4.7 A in the sheath of Methanospirilium hungatii: A cross-beta structure

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111185 ◽

1984 ◽

Vol 42 ◽

pp. 214-215

Author(s):

Murray Stewart ◽

T.J. Beveridge ◽

D. Sprott

Keyword(s):

Cell Wall ◽

Single Layer ◽

Uranyl Acetate ◽

Optical Diffraction ◽

Tube Axis ◽

Basic Subunit ◽

Beta Structure ◽

Diffraction Patterns ◽

Protein Treatment ◽

General Appearance

The archaebacterium Methanospirillum hungatii has a sheath as part of its cell wall which is composed mainly of protein. Treatment with dithiothreitol or NaOH released the intact sheaths and electron micrographs of this material negatively stained with uranyl acetate showed flattened hollow tubes, about 0.5 μm diameter and several microns long, in which the patterns from the top and bottom were superimposed. Single layers, derived from broken tubes, were also seen and were more simply analysed. Figure 1 shows the general appearance of a single layer. There was a faint axial periodicity at 28.5 A, which was stronger at irregular multiples of 28.5 A (3 and 4 times were most common), and fine striations were also seen at about 3° to the tube axis. Low angle electron diffraction patterns (not shown) and optical diffraction patterns (Fig. 2) from these layers showed a complex meridian (as a result of the irregular nature of the repeat along the tube axis) which showed a clear maximum at 28.5 A, consistent with the basic subunit spacing.

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Time-resolved high-resolution electron microscopy of structural stability in mgo clusters

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100165823 ◽

1996 ◽

Vol 54 ◽

pp. 672-673

Author(s):

T. Kizuka ◽

N. Tanaka

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

Magnesium Oxide ◽

Structural Stability ◽

High Resolution Electron Microscopy ◽

Video Tape ◽

Solid State Physics ◽

Time Resolved ◽

Resolution Electron ◽

Structural And Functional Properties

Structure and stability of atomic clusters have been studied by time-resolved high-resolution electron microscopy (TRHREM). Typical examples are observations of structural fluctuation in gold (Au) clusters supported on silicon oxide films, graphtized carbon films and magnesium oxide (MgO) films. All the observations have been performed on the clusters consisted of single metal element. Structural stability of ceramics clusters, such as metal-oxide, metal-nitride and metal-carbide clusters, has not been observed by TRHREM although the clusters show anomalous structural and functional properties concerning to solid state physics and materials science.In the present study, the behavior of ceramic, magnesium oxide (MgO) clusters is for the first time observed by TRHREM at 1/60 s time resolution and at atomic resolution down to 0.2 nm.MgO and gold were subsequently deposited on sodium chloride (001) substrates. The specimens, single crystalline MgO films on which Au particles were dispersed were separated in distilled water and observed by using a 200-kV high-resolution electron microscope (JEOL, JEM2010) equipped with a high sensitive TV camera and a video tape recorder system.

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Differentiation Processes of the Ocellar Retina of the Honeybee (Apis Mellifera L.)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100159692 ◽

1990 ◽

Vol 48 (3) ◽

pp. 430-431

Author(s):

Maria Anna Pabst

Keyword(s):

Apis Mellifera ◽

Distal Part ◽

Cell Layer ◽

Single Layer ◽

Photoreceptor Cells ◽

Distal Segment ◽

Compound Eyes ◽

Thin Sections ◽

Ultrastructural Studies ◽

Adult Worker

In addition to the compound eyes, honeybees have three dorsal ocelli on the vertex of the head. Each ocellus has about 800 elongated photoreceptor cells. They are paired and the distal segment of each pair bears densely packed microvilli forming together a platelike fused rhabdom. Beneath a common cuticular lens a single layer of corneagenous cells is present.Ultrastructural studies were made of the retina of praepupae, different pupal stages and adult worker bees by thin sections and freeze-etch preparations. In praepupae the ocellar anlage consists of a conical group of epidermal cells that differentiate to photoreceptor cells, glial cells and corneagenous cells. Some photoreceptor cells are already paired and show disarrayed microvilli with circularly ordered filaments inside. In ocelli of 2-day-old pupae, when a retinogenous and a lentinogenous cell layer can be clearly distinguished, cell membranes of the distal part of two photoreceptor cells begin to interdigitate with each other and so start to form the definitive microvilli. At the beginning the microvilli often occupy the whole width of the developing rhabdom (Fig. 1).

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